Tests - increase code coverage

Details: https://github.com/phingofficial/phing/issues/716

.docker/config/Dockerfile

@@ -0,0 +1,64 @@
+FROM php:5.5-cli
+
+#
+# Tools & libraries
+#
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        vim \
+        git \
+        zip \
+        unzip \
+        zlib1g-dev \
+        libicu-dev \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+#
+# PHP extensions
+#
+RUN docker-php-ext-install \
+    zip \
+    intl \
+    mbstring
+
+#
+# PHP configuration:
+# - default configuration
+# - timezone
+#
+COPY php.ini /usr/local/etc/php/php.ini
+ARG TIMEZONE
+RUN echo "\n""date.timezone = $TIMEZONE""\n" >> /usr/local/etc/php/php.ini
+
+#
+# Xdebug
+#
+RUN pecl install xdebug \
+    && docker-php-ext-enable xdebug
+COPY xdebug.ini /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
+
+#
+# Phing
+#
+RUN pear channel-discover pear.phing.info \
+    && pear install [--alldeps] phing/phing
+
+#
+# Composer + https://packagist.org/packages/hirak/prestissimo package
+#
+RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
+    && php -r "if (hash_file('SHA384', 'composer-setup.php') === \
+    '544e09ee996cdf60ece3804abc52599c22b1f40f4323403c44d44fdfdd586475ca9813a858088ffbc1f233e9b180f061') { echo \
+    'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" \
+    && php composer-setup.php --install-dir=/usr/local/bin --filename=composer \
+    && php -r "unlink('composer-setup.php');" \
+    && composer global require --no-plugins --no-scripts hirak/prestissimo \
+    && rm -rf /root/.composer/cache/*
+
+#
+# Bash
+#
+RUN sed -i 's/^# export/export/g' /root/.bashrc \
+    && sed -i 's/^# alias/alias/g' /root/.bashrc \
+    && echo "\n"'export PATH=/project/vendor/bin:$PATH'"\n" >> /root/.bashrc

.docker/config/php.ini

@@ -0,0 +1,3 @@
+display_errors = On
+display_startup_errors = On
+error_reporting = E_ALL

.docker/config/xdebug.ini

@@ -0,0 +1,6 @@
+[xdebug]
+zend_extension=xdebug.so
+
+xdebug.remote_enable=1
+xdebug.remote_port=9001
+xdebug.remote_host=10.254.254.254

.env

@@ -0,0 +1 @@
+TIMEZONE=Europe/Warsaw

.gitignore

@@ -7,13 +7,14 @@
 # ----------------------------------------------------------------------------------------------------------------------
 ### Composer
 # ----------------------------------------------------------------------------------------------------------------------
+/composer.lock
 /composer.phar
 
 
 # ----------------------------------------------------------------------------------------------------------------------
 ### Phing
 # ----------------------------------------------------------------------------------------------------------------------
-/phing/properties
+/.phing/properties
 
 
 # ----------------------------------------------------------------------------------------------------------------------
@@ -28,10 +29,16 @@
 /.php_cs.cache
 
 
+# ----------------------------------------------------------------------------------------------------------------------
+### Build files
+# ----------------------------------------------------------------------------------------------------------------------
+/.build/
+
+
 # ----------------------------------------------------------------------------------------------------------------------
 ### Generated databases
 # ----------------------------------------------------------------------------------------------------------------------
-/data/tmp
+/.data/tmp
 *.sql
 *.sqlite
 
@@ -54,60 +61,9 @@
 
 
 # ----------------------------------------------------------------------------------------------------------------------
-### JetBrains template
+### JetBrains
 # ----------------------------------------------------------------------------------------------------------------------
-# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+/.idea
-# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
-
-# User-specific stuff:
-.idea/**/workspace.xml
-.idea/**/tasks.xml
-.idea/dictionaries
-.idea/vcs.xml
-.idea/jsLibraryMappings.xml
-
-# Sensitive or high-churn files:
-.idea/**/dataSources/
-.idea/**/dataSources.ids
-.idea/**/dataSources.xml
-.idea/**/dataSources.local.xml
-.idea/**/sqlDataSources.xml
-.idea/**/dynamic.xml
-.idea/**/uiDesigner.xml
-
-# Gradle:
-.idea/**/gradle.xml
-.idea/**/libraries
-
-# CMake
-cmake-build-debug/
-
-# Mongo Explorer plugin:
-.idea/**/mongoSettings.xml
-
-## File-based project format:
-*.iws
-
-## Plugin-specific files:
-
-# IntelliJ
-out/
-
-# mpeltonen/sbt-idea plugin
-.idea_modules/
-
-# JIRA plugin
-atlassian-ide-plugin.xml
-
-# Cursive Clojure plugin
-.idea/replstate.xml
-
-# Crashlytics plugin (for Android Studio and IntelliJ)
-com_crashlytics_export_strings.xml
-crashlytics.properties
-crashlytics-build.properties
-fabric.properties
-
 
 
 # ----------------------------------------------------------------------------------------------------------------------

.idea/.name

@@ -1 +0,0 @@
-Common Library (GitHub)

.idea/Common Library (GitHub).iml

@@ -1,210 +0,0 @@
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-      <sourceFolder url="file://$MODULE_DIR$/src/Meritoo/Common" isTestSource="false" packagePrefix="Meritoo\Common\" />
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
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-      <excludeFolder url="file://$MODULE_DIR$/vendor/composer" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/annotations" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/cache" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/collections" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/common" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/dbal" />
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-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/console" />
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-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/dependency-injection" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/event-dispatcher" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/filesystem" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/finder" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/http-foundation" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
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-      <excludeFolder url="file://$MODULE_DIR$/vendor/theseer/fdomdocument" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/webmozart/assert" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="module-library">
-      <library name="PHP" type="php">
-        <CLASSES>
-          <root url="file://$MODULE_DIR$/vendor/behat/transliterator" />
-          <root url="file://$MODULE_DIR$/vendor/composer" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/annotations" />
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.idea/composerJson.xml

@@ -1,9 +0,0 @@
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.idea/encodings.xml

@@ -1,6 +0,0 @@
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@@ -1,8 +0,0 @@
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-      <path value="$PROJECT_DIR$/vendor/sebastian/exporter" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/code-unit-reverse-lookup" />
-      <path value="$PROJECT_DIR$/vendor/webmozart/assert" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/resource-operations" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/version" />
-      <path value="$PROJECT_DIR$/vendor/psr/log" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/diff" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/environment" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/comparator" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/global-state" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/dbal" />
-      <path value="$PROJECT_DIR$/vendor/psr/container" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/object-enumerator" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/recursion-context" />
-      <path value="$PROJECT_DIR$/vendor/friendsofphp/php-cs-fixer" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/type-resolver" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/phpunit" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/reflection-docblock" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/orm" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/reflection-common" />
-      <path value="$PROJECT_DIR$/vendor/pdepend/pdepend" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/phpcpd" />
-      <path value="$PROJECT_DIR$/vendor/phploc/phploc" />
-      <path value="$PROJECT_DIR$/vendor/squizlabs/php_codesniffer" />
-      <path value="$PROJECT_DIR$/vendor/phpmd/phpmd" />
-      <path value="$PROJECT_DIR$/vendor/paragonie/random_compat" />
-      <path value="$PROJECT_DIR$/vendor/myclabs/deep-copy" />
-      <path value="$PROJECT_DIR$/vendor/gedmo/doctrine-extensions" />
-    </include_path>
-  </component>
-  <component name="PhpUnit">
-    <phpunit_settings>
-      <PhpUnitSettings load_method="CUSTOM_LOADER" custom_loader_path="$PROJECT_DIR$/vendor/autoload.php" phpunit_phar_path="" />
-    </phpunit_settings>
-  </component>
-</project>

.idea/webResources.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="WebResourcesPaths">
-    <contentEntries>
-      <entry url="file://$PROJECT_DIR$">
-        <entryData>
-          <resourceRoots>
-            <path value="file://$PROJECT_DIR$/data" />
-          </resourceRoots>
-        </entryData>
-      </entry>
-    </contentEntries>
-  </component>
-</project>

.phing/app.xml

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project name="Meritoo Common Library" basedir="." default="build:main" phingVersion="2.14.0">
+<project name="Meritoo Package" basedir="." default="build:main" phingVersion="2.14.0">
     <!-- Properties -->
     <if>
-        <available file="phing/properties" property="custom.properties.available"/>
+        <available file=".phing/properties" property="custom.properties.available"/>
         <then>
-            <property file="phing/properties" />
+            <property file=".phing/properties" />
         </then>
         <else>
-            <property file="phing/properties.dist" />
+            <property file=".phing/properties.dist" />
         </else>
     </if>
 

.phing/properties.dist

@@ -28,7 +28,13 @@ assets.installWithSymlink = true
 
 # Clear cache with the "warmup" option
 #
-cache.clearWithWarmup = true
+# The cache:clear command should always be called with the --no-warmup option. Warmup should be done via the cache:warmup command.
+# https://github.com/symfony/symfony/blob/master/UPGRADE-3.3.md#frameworkbundle
+#
+# Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+# 2017-06-06
+#
+cache.clearWithWarmup = false
 
 # --------------------------------------------------------------------------------
 # Composer
@@ -59,7 +65,7 @@ composer.validate = false
 
 # System directories
 #
-dir.data = ${project.basedir}/data
+dir.data = ${project.basedir}/.data
 dir.src = ${project.basedir}/src
 dir.tests = ${project.basedir}/tests
 
@@ -67,7 +73,7 @@ dir.tests = ${project.basedir}/tests
 # Build directories
 # --------------------------------------------------------------------------------
 
-dir.build = ${project.basedir}/build
+dir.build = ${project.basedir}/.build
 dir.reports = ${dir.build}/logs
 dir.reports.pdepend = ${dir.reports}/pdepend
 dir.reports.coverage = ${dir.reports}/phpunit_coverage

.phing/tests.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project name="Meritoo Common Library" basedir="." default="build:main" phingVersion="2.14.0">
+<project name="Meritoo Package" basedir="." default="build:main" phingVersion="2.14.0">
     <!--
     The AutoloaderTask is required to load binaries installed by Composer.
     The "autoloaderpath" attribute of this task is not required, because it's default value is: vendor/autoload.php.
@@ -11,12 +11,12 @@
 
     <!-- Properties -->
     <if>
-        <available file="phing/properties" property="custom.properties.available"/>
+        <available file=".phing/properties" property="custom.properties.available"/>
         <then>
-            <property file="phing/properties" />
+            <property file=".phing/properties" />
         </then>
         <else>
-            <property file="phing/properties.dist" />
+            <property file=".phing/properties.dist" />
         </else>
     </if>
 

.styleci.yml

@@ -0,0 +1,8 @@
+preset: symfony
+
+disabled:
+    - phpdoc_annotation_without_dot
+    - cast_spaces
+    - concat_without_spaces
+    - blank_line_before_return
+    - trim_array_spaces

.travis.yml

@@ -0,0 +1,12 @@
+language: php
+
+php:
+  - 5.6
+  - 7.0
+  - 7.1
+
+install:
+  - composer install
+
+script:
+  - php ./vendor/bin/phpunit

README.md

@@ -1,38 +1,114 @@
 # Meritoo Common Library
-Useful classes, methods, extensions etc.
+Common and useful classes, methods, exceptions etc.
+
+[![Travis](https://img.shields.io/travis/rust-lang/rust.svg?style=flat-square)](https://travis-ci.org/meritoo/common-library) [![Packagist](https://img.shields.io/packagist/v/meritoo/common-library.svg?style=flat-square)](https://packagist.org/packages/meritoo/common-library) [![StyleCI](https://styleci.io/repos/101790028/shield?branch=master)](https://styleci.io/repos/101790028) [![license](https://img.shields.io/github/license/meritoo/common-library.svg?style=flat-square)](https://github.com/meritoo/common-library) [![GitHub commits](https://img.shields.io/github/commits-since/meritoo/common-library/0.0.1.svg?style=flat-square)](https://github.com/meritoo/common-library) [![Coverage Status](https://coveralls.io/repos/github/meritoo/common-library/badge.svg?branch=master)](https://coveralls.io/github/meritoo/common-library?branch=master)
 
 ## Installation
 
-#### Composer
+Run [Composer](https://getcomposer.org) to install this package in your project:
 
-1. Open ```composer.json``` and add address of repository in ```repositories``` section:
+```bash
-
+$ composer require meritoo/common-library
-    ```json
+```
-	"repositories": [
-		{
-			"type": "vcs",
-			"url": "git@github.com:meritoo/common-library.git"
-		}
-	]
-	```
-
-2. Run [Composer](https://getcomposer.org) to install new package:
-
-    ```bash
-    $ composer require meritoo/common-library
-    ```
 
 > How to install Composer: https://getcomposer.org/download
 
-## Usage
+## Rebuilding project and tests running
 
-This package contains a lot of static methods, so usage is not so complicated. Just run the static method who would you like to use. Example:
+```bash
+$ docker-compose up -d
+$ docker-compose exec php-cli phing
+```
+
+> What is Docker? https://www.docker.com/what-docker
+
+## Static methods
+
+This package contains a lot of class with static methods, so usage is not so complicated. Just run the static method who would you like to use. Example:
 
 ```php
 use Meritoo\Common\Utilities\Arrays;
 
-$firstElement = Arrays::getFirstElement(['lorem' 'ipsum']);
+$firstElement = Arrays::getFirstElement(['lorem', 'ipsum']);
-// result: "lorem"
+var_dump($firstElement); // string(5) "lorem"
+```
+
+## Base test case with common methods and data providers
+
+Located here: `Meritoo\Common\Test\Base\BaseTestCase`. Just extend the `BaseTestCase` class and use it like in `Meritoo\Common\Test\Utilities\DateTest` class:
+
+```php
+class DateTest extends BaseTestCase
+{
+    /**
+     * @param mixed $value Empty value, e.g. ""
+     * @dataProvider provideEmptyValue
+     */
+    public function testGetDateTimeEmptyValue($value)
+    {
+        self::assertFalse(Date::getDateTime($value));
+    }
+
+	(...)
+}
+```
+
+or in `Meritoo\Common\Test\Utilities\MimeTypesTest` class:
+
+```php
+class MimeTypesTest extends BaseTestCase
+{
+	(...)
+
+    /**
+     * @param bool $mimeType The mime type, e.g. "video/mpeg"
+     * @dataProvider provideBooleanValue
+     */
+    public function testGetExtensionBooleanMimeType($mimeType)
+    {
+        self::assertEquals('', MimeTypes::getExtension($mimeType));
+    }
+
+	(...)
+}
+```
+
+## Collection of elements
+
+Located here: `Meritoo\Common\Collection\Collection`. It's a set of some elements, e.g. objects. It's iterable and countable. Provides very useful methods. Some of them:
+- `getFirst()` - returns the first element in the collection
+- `getLast()` - returns the last element in the collection
+- `isEmpty()` - returns information if collection is empty
+- `add($element, $index = null)` - adds given element (at the end of collection)
+- `addMultiple($elements, $useIndexes = false)` - adds given elements (at the end of collection)
+- `prepend($element)` - prepends given element (adds given element at the beginning of collection)
+- `remove($element)` - removes given element
+
+Examples of usage below.
+
+#### An empty collection
+
+```php
+use Meritoo\Common\Collection\Collection;
+
+$emptyCollection = new Collection();
+var_dump($emptyCollection->isEmpty()); // bool(true)
+```
+
+#### Simple collection
+
+```php
+use Meritoo\Common\Collection\Collection;
+
+$elements = [
+    'lorem',
+    'ipsum',
+    123 => 'dolor',
+    345 => 'sit',
+];
+
+$simpleCollection = new Collection($elements);
+var_dump($simpleCollection->has('dolor')); // bool(true)
 ```
 
 Enjoy!

build.xml

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project name="Meritoo Common Library" basedir="." default="build:main" phingVersion="2.14.0">
+<project name="Meritoo Package" basedir="." default="build:main" phingVersion="2.14.0">
     <!-- Properties -->
     <if>
-        <available file="phing/properties" property="custom.properties.available"/>
+        <available file=".phing/properties" property="custom.properties.available"/>
         <then>
-            <property file="phing/properties" />
+            <property file=".phing/properties" />
         </then>
         <else>
-            <property file="phing/properties.dist" />
+            <property file=".phing/properties.dist" />
         </else>
     </if>
 
@@ -18,12 +18,12 @@
 
     <!-- Build app -->
     <target name="build:app" description="Prepares app to build and tests">
-        <phing phingfile="phing/app.xml" haltonfailure="true" />
+        <phing phingfile=".phing/app.xml" haltonfailure="true" />
     </target>
 
     <!-- Build tests -->
     <target name="build:tests" description="Runs all tests, checks and creates docs">
-        <phing phingfile="phing/tests.xml" haltonfailure="true" />
+        <phing phingfile=".phing/tests.xml" haltonfailure="true" />
 
         <!--
         Conditional running of tests.
@@ -35,7 +35,7 @@
         <if>
             <equals arg1="${env}" arg2="test" />
             <then>
-                <phing phingfile="phing/tests.xml" haltonfailure="true" />
+                <phing phingfile=".phing/tests.xml" haltonfailure="true" />
             </then>
             <else>
                 <echo message="[Skipped] Running tests, checks and creating docs, because it's a not 'test' environment..." />

composer.json

@@ -2,7 +2,7 @@
     "name": "meritoo/common-library",
     "description": "Useful classes, methods, extensions etc.",
     "license": "MIT",
-    "version": "0.0.1",
+    "version": "0.0.18",
     "authors": [
         {
             "name": "Meritoo.pl",
@@ -11,24 +11,31 @@
         }
     ],
     "require": {
-        "php": ">=5.6.0",
+        "php": ">=5.5.9",
         "doctrine/orm": "^2.5",
         "gedmo/doctrine-extensions": "^2.4",
         "symfony/http-foundation": "^3.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8 || ^5.0",
+        "friendsofphp/php-cs-fixer": "^2.2",
-        "squizlabs/php_codesniffer": "^2.8",
-        "phpmd/phpmd": "^2.6",
-        "sebastian/phpcpd": "^3.0",
         "pdepend/pdepend": "^2.5",
-        "phploc/phploc": "^3.0",
+        "phploc/phploc": "^2.1",
-        "friendsofphp/php-cs-fixer": "^2.1"
+        "phpmd/phpmd": "^2.6",
+        "phpunit/phpunit": "^4.8",
+        "sebastian/phpcpd": "^2.0",
+        "squizlabs/php_codesniffer": "^2.9"
     },
     "autoload": {
         "psr-4": {
-            "Meritoo\\Common\\": "src/Meritoo/Common/",
+            "Meritoo\\Common\\": "src/"
-            "Meritoo\\Common\\Tests\\": "tests/Meritoo/Common/Tests/"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Meritoo\\Common\\Test\\": "tests/"
+        }
+    },
+    "config": {
+        "sort-packages": true
     }
 }

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '3'
+
+services:
+    php-cli:
+        image: meritoo/common-library
+        container_name: meritoo-common-library
+        working_dir: /project
+        entrypoint: php
+        command: -S 0.0.0.0:9999
+        build:
+            context: ./.docker/config
+            args:
+                - TIMEZONE=$TIMEZONE
+        volumes:
+            - .:/project

phpunit.xml.dist

@@ -12,7 +12,7 @@
          bootstrap="./vendor/autoload.php"
 >
     <testsuites>
-        <testsuite name="Meritoo's Common Library Test Suite">
+        <testsuite name="Meritoo Package - Main Test Suite">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
@@ -30,6 +30,6 @@
     </groups>
 
     <logging>
-        <log type="coverage-html" target="./build/logs/phpunit_coverage/html" />
+        <log type="coverage-html" target="./.build/logs/phpunit_coverage/html" />
     </logging>
 </phpunit>

src/Collection/Collection.php

@@ -0,0 +1,284 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Collection;
+
+use ArrayAccess;
+use ArrayIterator;
+use Countable;
+use IteratorAggregate;
+use Meritoo\Common\Utilities\Arrays;
+
+/**
+ * Collection of elements.
+ * It's a set of some elements, e.g. objects.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class Collection implements Countable, ArrayAccess, IteratorAggregate
+{
+    /**
+     * The elements of collection
+     *
+     * @var array
+     */
+    private $elements;
+
+    /**
+     * Class constructor
+     *
+     * @param array $elements (optional) The elements of collection
+     */
+    public function __construct(array $elements = [])
+    {
+        $this->elements = $elements;
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface Countable
+     */
+    public function count()
+    {
+        return count($this->elements);
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface ArrayAccess
+     */
+    public function offsetExists($offset)
+    {
+        return $this->exists($offset);
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface ArrayAccess
+     */
+    public function offsetGet($offset)
+    {
+        if ($this->exists($offset)) {
+            return $this->elements[$offset];
+        }
+
+        return null;
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface ArrayAccess
+     */
+    public function offsetSet($offset, $value)
+    {
+        $this->elements[$offset] = $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface ArrayAccess
+     */
+    public function offsetUnset($offset)
+    {
+        if ($this->exists($offset)) {
+            unset($this->elements[$offset]);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     * Required by interface IteratorAggregate
+     */
+    public function getIterator()
+    {
+        return new ArrayIterator($this->elements);
+    }
+
+    /**
+     * Adds given element (at the end of collection)
+     *
+     * @param mixed $element The element to add
+     * @param mixed $index   (optional) Index / key of the element
+     * @return $this
+     */
+    public function add($element, $index = null)
+    {
+        if (null === $index) {
+            $this->elements[] = $element;
+        } else {
+            $this->elements[$index] = $element;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Adds given elements (at the end of collection)
+     *
+     * @param array|Collection $elements   The elements to add
+     * @param bool|false       $useIndexes (optional) If is set to true, indexes of given elements will be used in
+     *                                     this collection. Otherwise - not.
+     * @return $this
+     */
+    public function addMultiple($elements, $useIndexes = false)
+    {
+        if (!empty($elements)) {
+            foreach ($elements as $index => $element) {
+                if (!$useIndexes) {
+                    $index = null;
+                }
+
+                $this->add($element, $index);
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Prepends given element (adds given element at the beginning of collection)
+     *
+     * @param mixed $element The element to prepend
+     * @return $this
+     */
+    public function prepend($element)
+    {
+        array_unshift($this->elements, $element);
+
+        return $this;
+    }
+
+    /**
+     * Removes given element
+     *
+     * @param mixed $element The element to remove
+     * @return $this
+     */
+    public function remove($element)
+    {
+        if ($this->count() > 0) {
+            foreach ($this->elements as $index => $existing) {
+                if ($element === $existing) {
+                    unset($this->elements[$index]);
+                    break;
+                }
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns information if collection is empty
+     *
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return empty($this->elements);
+    }
+
+    /**
+     * Returns information if given element is first in the collection
+     *
+     * @param mixed $element The element to verify
+     * @return bool
+     */
+    public function isFirst($element)
+    {
+        return reset($this->elements) === $element;
+    }
+
+    /**
+     * Returns information if given element is last in the collection
+     *
+     * @param mixed $element The element to verify
+     * @return bool
+     */
+    public function isLast($element)
+    {
+        return end($this->elements) === $element;
+    }
+
+    /**
+     * Returns information if the collection has given element, iow. if given element exists in the collection
+     *
+     * @param mixed $element The element to verify
+     * @return bool
+     */
+    public function has($element)
+    {
+        $index = Arrays::getIndexOf($this->elements, $element);
+
+        return null !== $index && false !== $index;
+    }
+
+    /**
+     * Returns previous element for given element
+     *
+     * @param mixed $element The element to verify
+     * @return mixed|null
+     */
+    public function getPrevious($element)
+    {
+        return Arrays::getPreviousElement($this->elements, $element);
+    }
+
+    /**
+     * Returns next element for given element
+     *
+     * @param mixed $element The element to verify
+     * @return mixed|null
+     */
+    public function getNext($element)
+    {
+        return Arrays::getNextElement($this->elements, $element);
+    }
+
+    /**
+     * Returns the first element in the collection
+     *
+     * @return mixed
+     */
+    public function getFirst()
+    {
+        return Arrays::getFirstElement($this->elements);
+    }
+
+    /**
+     * Returns the last element in the collection
+     *
+     * @return mixed
+     */
+    public function getLast()
+    {
+        return Arrays::getLastElement($this->elements);
+    }
+
+    /**
+     * Returns an array representation of the collection
+     *
+     * @return array
+     */
+    public function toArray()
+    {
+        return $this->elements;
+    }
+
+    /**
+     * Returns information if element with given index/key exists
+     *
+     * @param string|int $index The index/key of element
+     * @return bool
+     */
+    private function exists($index)
+    {
+        return isset($this->elements[$index]) || array_key_exists($index, $this->elements);
+    }
+}

src/Exception/Date/UnknownDatePartTypeException.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\Date;
+
+use Meritoo\Common\Exception\Base\UnknownTypeException;
+use Meritoo\Common\Type\DatePartType;
+
+/**
+ * An exception used while type of date part, e.g. "year", is unknown
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class UnknownDatePartTypeException extends UnknownTypeException
+{
+    /**
+     * Class constructor
+     *
+     * @param string $unknownDatePart Type of date part, e.g. "year". One of DatePartType class constants.
+     * @param string $value           Incorrect value
+     */
+    public function __construct($unknownDatePart, $value)
+    {
+        parent::__construct($unknownDatePart, new DatePartType(), sprintf('date part (with value %s)', $value));
+    }
+}

src/Exception/File/EmptyFileException.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\File;
+
+/**
+ * An exception used while file with given path is empty (has no content)
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class EmptyFileException extends \Exception
+{
+    /**
+     * Class constructor
+     *
+     * @param string $emptyFilePath Path of the empty file
+     */
+    public function __construct($emptyFilePath)
+    {
+        $template = 'File with path \'%s\' is empty (has no content). Did you provide path of proper file?';
+        $message = sprintf($template, $emptyFilePath);
+
+        parent::__construct($message);
+    }
+}

src/Exception/File/EmptyFilePathException.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\File;
+
+/**
+ * An exception used while path of given file is empty
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class EmptyFilePathException extends \Exception
+{
+    /**
+     * Class constructor
+     */
+    public function __construct()
+    {
+        parent::__construct('Path of the file is empty. Did you provide path of proper file?');
+    }
+}

src/Exception/File/NotExistingFileException.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\File;
+
+/**
+ * An exception used while file with given path does not exist
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class NotExistingFileException extends \Exception
+{
+    /**
+     * Class constructor
+     *
+     * @param string $notExistingFilePath Path of not existing (or not readable) file
+     */
+    public function __construct($notExistingFilePath)
+    {
+        $template = 'File with path \'%s\' does not exist (or is not readable). Did you provide path of proper file?';
+        $message = sprintf($template, $notExistingFilePath);
+
+        parent::__construct($message);
+    }
+}

src/Exception/Method/DisabledMethodException.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\Method;
+
+use Exception;
+
+/**
+ * An exception used while method cannot be called, because is disabled
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class DisabledMethodException extends Exception
+{
+    /**
+     * Class constructor
+     *
+     * @param string $disabledMethod    Name of the disabled method
+     * @param string $alternativeMethod (optional) Name of the alternative method
+     */
+    public function __construct($disabledMethod, $alternativeMethod = '')
+    {
+        $template = 'Method %s() cannot be called, because is disabled.';
+
+        if (!empty($alternativeMethod)) {
+            $template .= ' Use %s() instead.';
+        }
+
+        $message = sprintf($template, $disabledMethod, $alternativeMethod);
+        parent::__construct($message);
+    }
+}

src/Exception/Reflection/CannotResolveClassNameException.php

@@ -21,7 +21,7 @@ class CannotResolveClassNameException extends Exception
     /**
      * Class constructor
      *
-     * @param array|object|string $source   Source of the class's / trait's name. It cane be an array of objects,
+     * @param array|object|string $source   Source of the class's / trait's name. It can be an array of objects,
      *                                      namespaces, object or namespace.
      * @param bool                $forClass (optional) If is set to true, message of this exception for class is
      *                                      prepared. Otherwise - for trait.

src/Exception/Regex/IncorrectColorHexLengthException.php

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Exception;
+namespace Meritoo\Common\Exception\Regex;
 
 /**
  * An exception used while length of given hexadecimal value of color is incorrect

src/Exception/Regex/InvalidColorHexValueException.php

@@ -6,10 +6,10 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Exception;
+namespace Meritoo\Common\Exception\Regex;
 
 /**
- * An exception used while given hexadecimal value of color is incorrect
+ * An exception used while given hexadecimal value of color is invalid
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
@@ -19,11 +19,11 @@ class InvalidColorHexValueException extends \Exception
     /**
      * Class constructor
      *
-     * @param string $color Incorrect hexadecimal value of color
+     * @param string $color Invalid hexadecimal value of color
      */
     public function __construct($color)
     {
-        $message = sprintf('Hexadecimal value of color \'%s\' is incorrect. Is there everything ok?', $color);
+        $message = sprintf('Hexadecimal value of color \'%s\' is invalid. Is there everything ok?', $color);
         parent::__construct($message);
     }
 }

src/Exception/Regex/InvalidUrlException.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Meritoo\Common\Exception\Regex;
+
+/**
+ * An exception used while url is invalid
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class InvalidUrlException extends \Exception
+{
+    /**
+     * Class constructor
+     *
+     * @param string $url Invalid url
+     */
+    public function __construct($url)
+    {
+        $message = sprintf('Url \'%s\' is invalid. Is there everything ok?', $url);
+        parent::__construct($message);
+    }
+}

src/Exception/Type/UnknownOopVisibilityTypeException.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Meritoo\Common\Exception\Type;
+
+use Meritoo\Common\Exception\Base\UnknownTypeException;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * An exception used while the visibility of a property, a method or (as of PHP 7.1.0) a constant is unknown
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class UnknownOopVisibilityTypeException extends UnknownTypeException
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct($unknownType)
+    {
+        parent::__construct($unknownType, new OopVisibilityType(), 'OOP-related visibility');
+    }
+}

src/Meritoo/Common/Exception/Date/IncorrectDatePartException.php

@@ -1,32 +0,0 @@
-<?php
-
-/**
- * (c) Meritoo.pl, http://www.meritoo.pl
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Meritoo\Common\Exception\Date;
-
-use Exception;
-
-/**
- * An exception used while given part of date is incorrect, e.g. value of year is incorrect
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class IncorrectDatePartException extends Exception
-{
-    /**
-     * Class constructor
-     *
-     * @param string $value    Incorrect value
-     * @param string $datePart Type of date part, e.g. "year". One of \Meritoo\Common\Type\DatePartType class constants.
-     */
-    public function __construct($value, $datePart)
-    {
-        $message = sprintf('Value of %s \'%s\' is incorrect. Is there everything ok?', $datePart, $value);
-        parent::__construct($message);
-    }
-}

src/Meritoo/Common/Utilities/TestCase.php

@@ -1,103 +0,0 @@
-<?php
-
-namespace Meritoo\Common\Utilities;
-
-use DateTime;
-use Generator;
-
-/**
- * Test case with common methods and data providers
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class TestCase extends \PHPUnit_Framework_TestCase
-{
-    /**
-     * Provides an empty value
-     *
-     * @return Generator
-     */
-    public function provideEmptyValue()
-    {
-        yield[''];
-        yield['   '];
-        yield[null];
-        yield[0];
-        yield[false];
-        yield[[]];
-    }
-
-    /**
-     * Provides boolean value
-     *
-     * @return Generator
-     */
-    public function provideBooleanValue()
-    {
-        yield[false];
-        yield[true];
-    }
-
-    /**
-     * Provides instance of DateTime class
-     *
-     * @return Generator
-     */
-    public function provideDateTimeInstance()
-    {
-        yield[new DateTime()];
-        yield[new DateTime('yesterday')];
-        yield[new DateTime('now')];
-        yield[new DateTime('tomorrow')];
-    }
-
-    /**
-     * Provides relative / compound format of DateTime
-     *
-     * @return Generator
-     */
-    public function provideDateTimeRelativeFormat()
-    {
-        yield['now'];
-        yield['yesterday'];
-        yield['tomorrow'];
-        yield['back of 10'];
-        yield['front of 10'];
-        yield['last day of February'];
-        yield['first day of next month'];
-        yield['last day of previous month'];
-        yield['last day of next month'];
-        yield['Y-m-d'];
-        yield['Y-m-d 10:00'];
-    }
-
-    /**
-     * Provides path of not existing file, e.g. "lorem/ipsum.jpg"
-     *
-     * @return Generator
-     */
-    public function provideNotExistingFilePath()
-    {
-        yield['lets-test.doc'];
-        yield['lorem/ipsum.jpg'];
-        yield['suprise/me/one/more/time.txt'];
-    }
-
-    /**
-     * Returns path of file used by tests.
-     * It should be placed in /data/tests directory of this project.
-     *
-     * @param string $fileName      Name of file
-     * @param string $directoryPath (optional) Path of directory containing the file
-     * @return string
-     */
-    public function getFilePathToTests($fileName, $directoryPath = '')
-    {
-        if (!empty($directoryPath)) {
-            $directoryPath = '/' . $directoryPath;
-        }
-
-        return sprintf('%s/../../../../data/tests/%s%s', __DIR__, $fileName, $directoryPath);
-    }
-}

src/Test/Base/BaseTestCase.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Base;
+
+use Meritoo\Common\Traits\Test\Base\BaseTestCaseTrait;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Base test case with common methods and data providers
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+abstract class BaseTestCase extends TestCase
+{
+    use BaseTestCaseTrait;
+}

src/Test/Base/BaseTypeTestCase.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Base;
+
+use Meritoo\Common\Traits\Test\Base\BaseTypeTestCaseTrait;
+
+/**
+ * Base test case for the type of something
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+abstract class BaseTypeTestCase extends BaseTestCase
+{
+    use BaseTypeTestCaseTrait;
+}

src/Traits/Test/Base/BaseTestCaseTrait.php

@@ -0,0 +1,238 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Traits\Test\Base;
+
+use DateTime;
+use Generator;
+use Meritoo\Common\Exception\Type\UnknownOopVisibilityTypeException;
+use Meritoo\Common\Type\OopVisibilityType;
+use Meritoo\Common\Utilities\Miscellaneous;
+use ReflectionClass;
+use ReflectionMethod;
+
+/**
+ * BaseTestCaseTrait
+ * Created on 2017-11-02
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+trait BaseTestCaseTrait
+{
+    /**
+     * Path of directory with data used by test cases
+     *
+     * @var string
+     */
+    private static $testsDataDirPath = '.data/tests';
+
+    /**
+     * Provides an empty value
+     *
+     * @return Generator
+     */
+    public function provideEmptyValue()
+    {
+        yield[''];
+        yield['   '];
+        yield[null];
+        yield[0];
+        yield[false];
+        yield[[]];
+    }
+
+    /**
+     * Provides boolean value
+     *
+     * @return Generator
+     */
+    public function provideBooleanValue()
+    {
+        yield[false];
+        yield[true];
+    }
+
+    /**
+     * Provides instance of DateTime class
+     *
+     * @return Generator
+     */
+    public function provideDateTimeInstance()
+    {
+        yield[new DateTime()];
+        yield[new DateTime('yesterday')];
+        yield[new DateTime('now')];
+        yield[new DateTime('tomorrow')];
+    }
+
+    /**
+     * Provides relative / compound format of DateTime
+     *
+     * @return Generator
+     */
+    public function provideDateTimeRelativeFormat()
+    {
+        yield['now'];
+        yield['yesterday'];
+        yield['tomorrow'];
+        yield['back of 10'];
+        yield['front of 10'];
+        yield['last day of February'];
+        yield['first day of next month'];
+        yield['last day of previous month'];
+        yield['last day of next month'];
+        yield['Y-m-d'];
+        yield['Y-m-d 10:00'];
+    }
+
+    /**
+     * Provides path of not existing file, e.g. "lorem/ipsum.jpg"
+     *
+     * @return Generator
+     */
+    public function provideNotExistingFilePath()
+    {
+        yield['lets-test.doc'];
+        yield['lorem/ipsum.jpg'];
+        yield['surprise/me/one/more/time.txt'];
+    }
+
+    /**
+     * Returns path of file used by tests.
+     * It should be placed in /.data/tests directory of this project.
+     *
+     * @param string $fileName      Name of file
+     * @param string $directoryPath (optional) Path of directory containing the file
+     * @return string
+     */
+    public function getFilePathForTesting($fileName, $directoryPath = '')
+    {
+        $rootPath = Miscellaneous::getProjectRootPath();
+
+        $paths = [
+            $rootPath,
+            self::$testsDataDirPath,
+            $directoryPath,
+            $fileName,
+        ];
+
+        return Miscellaneous::concatenatePaths($paths);
+    }
+
+    /**
+     * Verifies visibility and arguments of method
+     *
+     * @param string                  $classNamespace         Namespace of class that contains method to verify
+     * @param string|ReflectionMethod $method                 Name of method or just the method to verify
+     * @param string                  $visibilityType         Expected visibility of verified method. One of
+     *                                                        OopVisibilityType class constants.
+     * @param int                     $argumentsCount         (optional) Expected count/amount of arguments of the
+     *                                                        verified method
+     * @param int                     $requiredArgumentsCount (optional) Expected count/amount of required arguments
+     *                                                        of the verified method
+     * @throws UnknownOopVisibilityTypeException
+     *
+     * Attention. 2nd argument, the $method, may be:
+     * - string - name of the method
+     * - instance of ReflectionMethod - just the method (provided by ReflectionClass::getMethod() method)
+     */
+    protected static function assertMethodVisibilityAndArguments(
+        $classNamespace,
+        $method,
+        $visibilityType,
+        $argumentsCount = 0,
+        $requiredArgumentsCount = 0
+    ) {
+        /*
+         * Type of visibility is correct?
+         */
+        if (!(new OopVisibilityType())->isCorrectType($visibilityType)) {
+            throw new UnknownOopVisibilityTypeException($visibilityType);
+        }
+
+        $reflection = new ReflectionClass($classNamespace);
+
+        /*
+         * Name of method provided only?
+         * Let's find instance of the method (based on reflection)
+         */
+        if (!$method instanceof ReflectionMethod) {
+            $method = $reflection->getMethod($method);
+        }
+
+        switch ($visibilityType) {
+            case OopVisibilityType::IS_PUBLIC:
+                static::assertTrue($method->isPublic());
+                break;
+
+            case OopVisibilityType::IS_PROTECTED:
+                static::assertTrue($method->isProtected());
+                break;
+
+            case OopVisibilityType::IS_PRIVATE:
+                static::assertTrue($method->isPrivate());
+                break;
+        }
+
+        static::assertEquals($argumentsCount, $method->getNumberOfParameters());
+        static::assertEquals($requiredArgumentsCount, $method->getNumberOfRequiredParameters());
+    }
+
+    /**
+     * Verifies visibility and arguments of class constructor
+     *
+     * @param string $classNamespace         Namespace of class that contains constructor to verify
+     * @param string $visibilityType         Expected visibility of verified method. One of OopVisibilityType class
+     *                                       constants.
+     * @param int    $argumentsCount         (optional) Expected count/amount of arguments of the verified method
+     * @param int    $requiredArgumentsCount (optional) Expected count/amount of required arguments of the verified
+     *                                       method
+     * @throws UnknownOopVisibilityTypeException
+     */
+    protected static function assertConstructorVisibilityAndArguments(
+        $classNamespace,
+        $visibilityType,
+        $argumentsCount = 0,
+        $requiredArgumentsCount = 0
+    ) {
+        /*
+         * Let's grab the constructor
+         */
+        $reflection = new ReflectionClass($classNamespace);
+        $method = $reflection->getConstructor();
+
+        static::assertMethodVisibilityAndArguments($classNamespace, $method, $visibilityType, $argumentsCount, $requiredArgumentsCount);
+    }
+
+    /**
+     * Asserts that class with given namespace has no constructor
+     *
+     * @param string $classNamespace Namespace of class that contains constructor to verify
+     */
+    protected static function assertHasNoConstructor($classNamespace)
+    {
+        /*
+         * Let's grab the constructor
+         */
+        $reflection = new ReflectionClass($classNamespace);
+        $constructor = $reflection->getConstructor();
+
+        static::assertNull($constructor);
+    }
+
+    /**
+     * Sets path of directory with data used by test cases
+     *
+     * @param string $testsDataDirPath Path of directory with data used by test cases
+     */
+    protected static function setTestsDataDirPath($testsDataDirPath)
+    {
+        static::$testsDataDirPath = $testsDataDirPath;
+    }
+}

src/Traits/Test/Base/BaseTypeTestCaseTrait.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Traits\Test\Base;
+
+use Generator;
+use Meritoo\Common\Type\Base\BaseType;
+
+/**
+ * Trait for the base test case for the type of something
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+trait BaseTypeTestCaseTrait
+{
+    /**
+     * Verifies availability of all types
+     */
+    public function testAvailabilityOfAllTypes()
+    {
+        $available = $this->getTestedTypeInstance()->getAll();
+        $all = $this->getAllExpectedTypes();
+
+        static::assertEquals($all, $available);
+    }
+
+    /**
+     * Verifies whether given type is correct or not
+     *
+     * @param string $type     Type to verify
+     * @param bool   $expected Information if given type is correct or not
+     *
+     * @dataProvider provideTypeToVerify
+     */
+    public function testIfGivenTypeIsCorrect($type, $expected)
+    {
+        static::assertEquals($expected, $this->getTestedTypeInstance()->isCorrectType($type));
+    }
+
+    /**
+     * Provides type to verify and information if it's correct
+     *
+     * @return Generator
+     */
+    abstract public function provideTypeToVerify();
+
+    /**
+     * Returns instance of the tested type
+     *
+     * @return BaseType
+     */
+    abstract protected function getTestedTypeInstance();
+
+    /**
+     * Returns all expected types of the tested type
+     *
+     * @return array
+     */
+    abstract protected function getAllExpectedTypes();
+}

src/Type/Base/BaseType.php

@@ -33,7 +33,7 @@ abstract class BaseType
      */
     public function getAll()
     {
-        if ($this->all === null) {
+        if (null === $this->all) {
             $this->all = Reflection::getConstants($this);
         }
 

src/Type/DatePartType.php

@@ -1,5 +1,11 @@
 <?php
 
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Meritoo\Common\Type;
 
 use Meritoo\Common\Type\Base\BaseType;

src/Type/DatePeriod.php

@@ -6,9 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Utilities;
+namespace Meritoo\Common\Type;
 
 use DateTime;
+use Meritoo\Common\Type\Base\BaseType;
+use Meritoo\Common\Utilities\Date;
 
 /**
  * A date's period.
@@ -17,7 +19,7 @@ use DateTime;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePeriod
+class DatePeriod extends BaseType
 {
     /**
      * The period constant: last month
@@ -108,17 +110,6 @@ class DatePeriod
         $this->endDate = $endDate;
     }
 
-    /**
-     * Returns information if given period is correct
-     *
-     * @param int $period The period to verify
-     * @return bool
-     */
-    public static function isCorrectPeriod($period)
-    {
-        return in_array($period, Reflection::getConstants(__CLASS__));
-    }
-
     /**
      * Returns formatted one of the period's date: start date or end date
      *
@@ -140,7 +131,7 @@ class DatePeriod
         /*
          * Unknown date or format is invalid?
          */
-        if ($date === null || !Date::isValidDateFormat($format)) {
+        if (null === $date || !Date::isValidDateFormat($format)) {
             return '';
         }
 

src/Type/OopVisibilityType.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Meritoo\Common\Type;
+
+use Meritoo\Common\Type\Base\BaseType;
+
+/**
+ * The visibility of a property, a method or (as of PHP 7.1.0) a constant
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ *
+ * @see       http://php.net/manual/en/language.oop5.visibility.php
+ */
+class OopVisibilityType extends BaseType
+{
+    /**
+     * The "private" visibility of OOP
+     *
+     * @var int
+     */
+    const IS_PRIVATE = 3;
+
+    /**
+     * The "protected" visibility of OOP
+     *
+     * @var int
+     */
+    const IS_PROTECTED = 2;
+
+    /**
+     * The "public" visibility of OOP
+     *
+     * @var int
+     */
+    const IS_PUBLIC = 1;
+}

src/Utilities/Arrays.php

@@ -415,7 +415,7 @@ class Arrays
                      * var autoGeneratedVariable = new Array(...);autoGeneratedVariable[0] = new Array(...);
                      * autoGeneratedVariable[1] = new Array(...);
                      */
-                    if ($counter === 1) {
+                    if (1 === $counter) {
                         $effect .= "\n";
                     }
 
@@ -758,7 +758,7 @@ class Arrays
         foreach ($exploded as $item) {
             $exploded2 = explode($valuesKeysSeparator, $item);
 
-            if (count($exploded2) == 2) {
+            if (2 == count($exploded2)) {
                 $key = trim($exploded2[0]);
                 $value = trim($exploded2[1]);
 
@@ -1124,7 +1124,7 @@ class Arrays
         if (!empty($array)) {
             $childPosition = 1;
 
-            if ($startPosition !== null) {
+            if (null !== $startPosition) {
                 $array[$keyName] = $startPosition;
             }
 
@@ -1316,7 +1316,7 @@ class Arrays
              *
              * If one of the above is true, not all elements of given array are empty
              */
-            if ((!is_array($element) && $strictNull && $element !== null) || !empty($element)) {
+            if ((!is_array($element) && $strictNull && null !== $element) || !empty($element)) {
                 return false;
             }
         }
@@ -1353,7 +1353,7 @@ class Arrays
          * Values should be compared only and both arrays are one-dimensional?
          * Let's find difference by using simple function
          */
-        if ($valuesOnly && self::getDimensionsCount($array1) == 1 && self::getDimensionsCount($array2) == 1) {
+        if ($valuesOnly && 1 == self::getDimensionsCount($array1) && 1 == self::getDimensionsCount($array2)) {
             return array_diff($array1, $array2);
         }
 
@@ -1381,7 +1381,7 @@ class Arrays
                     }
                 }
 
-                if ($difference !== null) {
+                if (null !== $difference) {
                     $effect[] = $difference;
                 }
             } else {
@@ -1472,7 +1472,7 @@ class Arrays
              * Start index not provided?
              * Let's look for the first index / key of given array
              */
-            if ($startIndex === null) {
+            if (null === $startIndex) {
                 $startIndex = self::getFirstKey($array);
             }
 
@@ -1617,7 +1617,7 @@ class Arrays
          * Index of element or of element's key is unknown?
          * Probably the element does not exist in given array, so... nothing to do
          */
-        if ($elementKey === null || $indexOfKey === null) {
+        if (null === $elementKey || null === $indexOfKey) {
             return null;
         }
 

src/Utilities/Composer.php

@@ -59,7 +59,7 @@ class Composer
          * Unknown data from the composer.json file or there is no node with given name?
          * Nothing to do
          */
-        if ($data === null || !isset($data->{$nodeName})) {
+        if (null === $data || !isset($data->{$nodeName})) {
             return null;
         }
 

src/Utilities/Date.php

@@ -10,8 +10,9 @@ namespace Meritoo\Common\Utilities;
 
 use DateInterval;
 use DateTime;
-use Meritoo\Common\Exception\Date\IncorrectDatePartException;
+use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
 use Meritoo\Common\Type\DatePartType;
+use Meritoo\Common\Type\DatePeriod;
 
 /**
  * Useful date methods
@@ -66,13 +67,18 @@ class Date
      * The dates are returned in an array with indexes 'start' and 'end'.
      *
      * @param int $period The period, type of period. One of DatePeriod class constants, e.g. DatePeriod::LAST_WEEK.
-     * @return DatePeriod
+     * @return null|DatePeriod
      */
     public static function getDatesForPeriod($period)
     {
-        $datePeriod = null;
+        /*
+         * Type of period is incorrect?
+         * Nothing to do
+         */
+        if (!(new DatePeriod())->isCorrectType($period)) {
+            return null;
+        }
 
-        if (DatePeriod::isCorrectPeriod($period)) {
         $dateStart = null;
         $dateEnd = null;
 
@@ -129,10 +135,10 @@ class Date
                 $dateStart = new DateTime();
                 $dateEnd = new DateTime();
 
-                    if ($period == DatePeriod::LAST_YEAR || $period == DatePeriod::NEXT_YEAR) {
+                if (DatePeriod::LAST_YEAR == $period || DatePeriod::NEXT_YEAR == $period) {
                     $yearDifference = 1;
 
-                        if ($period == DatePeriod::LAST_YEAR) {
+                    if (DatePeriod::LAST_YEAR == $period) {
                         $yearDifference *= -1;
                     }
 
@@ -148,15 +154,18 @@ class Date
                 break;
         }
 
-            if ($dateStart !== null && $dateEnd !== null) {
+        /*
+         * Start or end date is unknown?
+         * Nothing to do
+         */
+        if (null === $dateStart || null === $dateEnd) {
+            return null;
+        }
+
         $dateStart->setTime(0, 0, 0);
         $dateEnd->setTime(23, 59, 59);
 
-                $datePeriod = new DatePeriod($dateStart, $dateEnd);
+        return new DatePeriod($dateStart, $dateEnd);
-            }
-        }
-
-        return $datePeriod;
     }
 
     /**
@@ -231,7 +240,7 @@ class Date
      * @param int $day   The day value
      *
      * @return int
-     * @throws IncorrectDatePartException
+     * @throws UnknownDatePartTypeException
      */
     public static function getDayOfWeek($year, $month, $day)
     {
@@ -243,21 +252,21 @@ class Date
          * Oops, incorrect year
          */
         if ($year <= 0) {
-            throw new IncorrectDatePartException($year, DatePartType::YEAR);
+            throw new UnknownDatePartTypeException(DatePartType::YEAR, $year);
         }
 
         /*
          * Oops, incorrect month
          */
         if ($month < 1 || $month > 12) {
-            throw new IncorrectDatePartException($month, DatePartType::MONTH);
+            throw new UnknownDatePartTypeException(DatePartType::MONTH, $month);
         }
 
         /*
          * Oops, incorrect day
          */
         if ($day < 1 || $day > 31) {
-            throw new IncorrectDatePartException($day, DatePartType::DAY);
+            throw new UnknownDatePartTypeException(DatePartType::DAY, $day);
         }
 
         if ($month < 3) {
@@ -311,7 +320,7 @@ class Date
 
         $encoding = mb_detect_encoding($name);
 
-        if ($encoding === false) {
+        if (false === $encoding) {
             $name = mb_convert_encoding($name, 'UTF-8', 'ISO-8859-2');
         }
 
@@ -378,46 +387,46 @@ class Date
             self::DATE_DIFFERENCE_UNIT_MINUTES,
         ];
 
-        if ($differenceUnit === null || $differenceUnit == self::DATE_DIFFERENCE_UNIT_YEARS) {
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_YEARS == $differenceUnit) {
             $diff = $dateEnd->diff($dateStart);
 
             /*
              * Difference between dates in years should be returned only?
              */
-            if ($differenceUnit == self::DATE_DIFFERENCE_UNIT_YEARS) {
+            if (self::DATE_DIFFERENCE_UNIT_YEARS == $differenceUnit) {
                 return $diff->y;
             }
 
             $difference[self::DATE_DIFFERENCE_UNIT_YEARS] = $diff->y;
         }
 
-        if ($differenceUnit === null || $differenceUnit == self::DATE_DIFFERENCE_UNIT_MONTHS) {
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MONTHS == $differenceUnit) {
             $diff = $dateEnd->diff($dateStart);
 
             /*
              * Difference between dates in months should be returned only?
              */
-            if ($differenceUnit == self::DATE_DIFFERENCE_UNIT_MONTHS) {
+            if (self::DATE_DIFFERENCE_UNIT_MONTHS == $differenceUnit) {
                 return $diff->m;
             }
 
             $difference[self::DATE_DIFFERENCE_UNIT_MONTHS] = $diff->m;
         }
 
-        if ($differenceUnit === null || in_array($differenceUnit, $relatedUnits)) {
+        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits)) {
             $days = (int)floor($dateDiff / $daySeconds);
 
             /*
              * Difference between dates in days should be returned only?
              */
-            if ($differenceUnit == self::DATE_DIFFERENCE_UNIT_DAYS) {
+            if (self::DATE_DIFFERENCE_UNIT_DAYS == $differenceUnit) {
                 return $days;
             }
 
             /*
              * All units should be returned?
              */
-            if ($differenceUnit === null) {
+            if (null === $differenceUnit) {
                 $difference[self::DATE_DIFFERENCE_UNIT_DAYS] = $days;
             }
 
@@ -427,20 +436,20 @@ class Date
             $daysInSeconds = $days * $daySeconds;
         }
 
-        if ($differenceUnit === null || in_array($differenceUnit, $relatedUnits)) {
+        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits)) {
             $hours = (int)floor(($dateDiff - $daysInSeconds) / $hourSeconds);
 
             /*
              * Difference between dates in hours should be returned only?
              */
-            if ($differenceUnit == self::DATE_DIFFERENCE_UNIT_HOURS) {
+            if (self::DATE_DIFFERENCE_UNIT_HOURS == $differenceUnit) {
                 return $hours;
             }
 
             /*
              * All units should be returned?
              */
-            if ($differenceUnit === null) {
+            if (null === $differenceUnit) {
                 $difference[self::DATE_DIFFERENCE_UNIT_HOURS] = $hours;
             }
 
@@ -450,13 +459,13 @@ class Date
             $hoursInSeconds = $hours * $hourSeconds;
         }
 
-        if ($differenceUnit === null || $differenceUnit == self::DATE_DIFFERENCE_UNIT_MINUTES) {
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MINUTES == $differenceUnit) {
             $minutes = (int)floor(($dateDiff - $daysInSeconds - $hoursInSeconds) / 60);
 
             /*
              * Difference between dates in minutes should be returned only?
              */
-            if ($differenceUnit == self::DATE_DIFFERENCE_UNIT_MINUTES) {
+            if (self::DATE_DIFFERENCE_UNIT_MINUTES == $differenceUnit) {
                 return $minutes;
             }
 
@@ -524,7 +533,7 @@ class Date
      */
     public static function getRandomDate(DateTime $startDate = null, $start = 1, $end = 100, $intervalTemplate = 'P%sD')
     {
-        if ($startDate === null) {
+        if (null === $startDate) {
             $startDate = new DateTime();
         }
 
@@ -590,7 +599,7 @@ class Date
                  */
                 $dateFromFormat = DateTime::createFromFormat($dateFormat, $value);
 
-                if ($dateFromFormat === false) {
+                if (false === $dateFromFormat) {
                     /*
                      * Nothing to do more, because:
                      * a) instance of the DateTime was created

src/Utilities/Miscellaneous.php

@@ -65,7 +65,7 @@ class Miscellaneous
 
         if (!empty($directoryContent)) {
             foreach ($directoryContent as $fileName) {
-                if ($fileName != '.' && $fileName != '..') {
+                if ('.' != $fileName && '..' != $fileName) {
                     $content = null;
 
                     if (!empty($startFileName) && !$startFileFound) {
@@ -80,7 +80,7 @@ class Miscellaneous
                         $content = self::getDirectoryContent($directoryPath . $fileName, true, $maxFilesCount - $count);
                     }
 
-                    if ($content !== null) {
+                    if (null !== $content) {
                         $files[$fileName] = $content;
 
                         if (!empty($maxFilesCount)) {
@@ -365,7 +365,7 @@ class Miscellaneous
          * Oops, cannot instantiate converter
          * Nothing to do
          */
-        if ($converter === null) {
+        if (null === $converter) {
             return '';
         }
 
@@ -460,7 +460,7 @@ class Miscellaneous
          * Value to find is neither a string nor an array OR it's an empty string?
          * Nothing to do
          */
-        if ((!$searchIsString && !$searchIsArray) || ($searchIsString && strlen($search) == 0)) {
+        if ((!$searchIsString && !$searchIsArray) || ($searchIsString && 0 == strlen($search))) {
             return $effect;
         }
 
@@ -612,7 +612,7 @@ class Miscellaneous
             $effect = mb_substr($text, 0, $maxLength, 'utf-8');
             $lastSpacePosition = mb_strrpos($effect, ' ', 'utf-8');
 
-            if ($lastSpacePosition !== false) {
+            if (false !== $lastSpacePosition) {
                 $effect = mb_substr($effect, 0, $lastSpacePosition, 'utf-8');
             }
 
@@ -730,7 +730,7 @@ class Miscellaneous
         }
 
         foreach (scandir($directoryPath) as $item) {
-            if ($item == '.' || $item == '..') {
+            if ('.' == $item || '..' == $item) {
                 continue;
             }
 
@@ -776,7 +776,7 @@ class Miscellaneous
         foreach ($members as $key => $value) {
             $value = mb_strtolower($value);
 
-            if ($key == 0) {
+            if (0 == $key) {
                 $effect .= self::lowercaseFirst($value);
             } else {
                 $effect .= self::uppercaseFirst($value);
@@ -812,7 +812,7 @@ class Miscellaneous
 
         if ($restLowercase) {
             $effect = mb_strtolower($effect);
-        } elseif ($restLowercase === false) {
+        } elseif (false === $restLowercase) {
             $effect = mb_strtoupper($effect);
         }
 
@@ -850,7 +850,7 @@ class Miscellaneous
 
         if ($restLowercase) {
             $effect = mb_strtolower($effect);
-        } elseif ($restLowercase === false) {
+        } elseif (false === $restLowercase) {
             $effect = mb_strtoupper($effect);
         }
 
@@ -1032,6 +1032,8 @@ class Miscellaneous
         $separator = DIRECTORY_SEPARATOR;
 
         foreach ($paths as $path) {
+            $path = trim($path);
+
             /*
              * Empty paths are useless
              */
@@ -1153,7 +1155,7 @@ class Miscellaneous
     {
         $value = filter_input($globalSourceType, $variableName);
 
-        if ($value === null) {
+        if (null === $value) {
             $globalSource = null;
 
             switch ($globalSourceType) {
@@ -1178,7 +1180,7 @@ class Miscellaneous
                     break;
             }
 
-            if ($globalSource !== null && isset($globalSource[$variableName])) {
+            if (null !== $globalSource && isset($globalSource[$variableName])) {
                 $value = $globalSource[$variableName];
 
                 if (!ini_get('magic_quotes_gpc')) {
@@ -1232,7 +1234,7 @@ class Miscellaneous
             /*
              * First line is only HTTP status and is unneeded so skip it
              */
-            if ($i === 0) {
+            if (0 === $i) {
                 continue;
             }
 
@@ -1242,7 +1244,7 @@ class Miscellaneous
                 /*
                  * If the header is a "set-cookie" let's save it to "cookies" array
                  */
-                if ($key === 'Set-Cookie') {
+                if ('Set-Cookie' === $key) {
                     $cookieParameters = explode(';', $value);
 
                     $name = '';
@@ -1260,7 +1262,7 @@ class Miscellaneous
                          * First parameter will be always a cookie name and it's value. It is not needed to run
                          * further actions for them, so save the values and move to next parameter.
                          */
-                        if ($j === 0) {
+                        if (0 === $j) {
                             $name = trim($param[0]);
                             $value = trim($param[1]);
                             continue;
@@ -1416,7 +1418,7 @@ class Miscellaneous
         if ($asHexadecimal) {
             $hexadecimal = dechex($colorComponent);
 
-            if (strlen($hexadecimal) == 1) {
+            if (1 == strlen($hexadecimal)) {
                 return sprintf('0%s', $hexadecimal, $hexadecimal);
             }
 
@@ -1471,4 +1473,37 @@ class Miscellaneous
 
         return $invertedColor;
     }
+
+    /**
+     * Returns project's root path.
+     * Looks for directory that contains composer.json.
+     *
+     * @return string
+     */
+    public static function getProjectRootPath()
+    {
+        $projectRootPath = '';
+
+        $fileName = 'composer.json';
+        $directoryPath = __DIR__;
+
+        /*
+         * Path of directory it's not the path of last directory?
+         */
+        while (DIRECTORY_SEPARATOR !== $directoryPath) {
+            $filePath = static::concatenatePaths($directoryPath, $fileName);
+
+            /*
+             * Is here file we are looking for?
+             * Maybe it's a project's root path
+             */
+            if (file_exists($filePath)) {
+                $projectRootPath = $directoryPath;
+            }
+
+            $directoryPath = dirname($directoryPath);
+        }
+
+        return $projectRootPath;
+    }
 }

src/Utilities/QueryBuilderUtility.php

@@ -33,6 +33,10 @@ class QueryBuilderUtility
     {
         $aliases = $queryBuilder->getRootAliases();
 
+        /*
+         * No aliases?
+         * Nothing to do
+         */
         if (empty($aliases)) {
             return null;
         }
@@ -42,7 +46,8 @@ class QueryBuilderUtility
 
     /**
      * Returns alias of given property joined in given query builder
-     * If the join does not exist, null is returned.
+     *
+     * If there are no joins or the join does not exist, null is returned.
      * It's also information if given property is already joined in given query builder.
      *
      * @param QueryBuilder $queryBuilder The query builder to verify
@@ -53,6 +58,10 @@ class QueryBuilderUtility
     {
         $joins = $queryBuilder->getDQLPart('join');
 
+        /*
+         * No joins?
+         * Nothing to do
+         */
         if (empty($joins)) {
             return null;
         }
@@ -99,7 +108,18 @@ class QueryBuilderUtility
      */
     public static function setCriteria(QueryBuilder $queryBuilder, array $criteria = [], $alias = '')
     {
-        if (!empty($criteria)) {
+        /*
+         * No criteria used in WHERE clause?
+         * Nothing to do
+         */
+        if (empty($criteria)) {
+            return $queryBuilder;
+        }
+
+        /*
+         * No alias provided?
+         * Let's use root alias
+         */
         if (empty($alias)) {
             $alias = self::getRootAlias($queryBuilder);
         }
@@ -108,7 +128,7 @@ class QueryBuilderUtility
             $compareOperator = '=';
 
             if (is_array($value) && !empty($value)) {
-                    if (count($value) == 2) {
+                if (2 == count($value)) {
                     $compareOperator = $value[1];
                 }
 
@@ -117,7 +137,7 @@ class QueryBuilderUtility
 
             $predicate = sprintf('%s.%s %s :%s', $alias, $column, $compareOperator, $column);
 
-                if ($value === null) {
+            if (null === $value) {
                 $predicate = $queryBuilder->expr()->isNull(sprintf('%s.%s', $alias, $column));
                 unset($criteria[$column]);
             } else {
@@ -126,7 +146,6 @@ class QueryBuilderUtility
 
             $queryBuilder = $queryBuilder->andWhere($predicate);
         }
-        }
 
         return $queryBuilder;
     }
@@ -143,7 +162,7 @@ class QueryBuilderUtility
     public static function deleteEntities(EntityManager $entityManager, $entities, $flushDeleted = true)
     {
         /*
-         * No entities found?
+         * No entities provided?
          * Nothing to do
          */
         if (empty($entities)) {
@@ -169,13 +188,20 @@ class QueryBuilderUtility
      * Attention. Existing parameters will be overridden.
      *
      * @param QueryBuilder          $queryBuilder The query builder
-     * @param array|ArrayCollection $parameters   Parameters to add. Collection of instances of
+     * @param array|ArrayCollection $parameters   Parameters to add. Collection of Doctrine\ORM\Query\Parameter
-     *                                            Doctrine\ORM\Query\Parameter class or an array with key-value pairs.
+     *                                            instances or an array with key-value pairs.
      * @return QueryBuilder
      */
     public static function addParameters(QueryBuilder $queryBuilder, $parameters)
     {
-        if (!empty($parameters)) {
+        /*
+         * No parameters?
+         * Nothing to do
+         */
+        if (empty($parameters)) {
+            return $queryBuilder;
+        }
+
         foreach ($parameters as $key => $parameter) {
             $name = $key;
             $value = $parameter;
@@ -187,7 +213,6 @@ class QueryBuilderUtility
 
             $queryBuilder->setParameter($name, $value);
         }
-        }
 
         return $queryBuilder;
     }

src/Utilities/Reflection.php

@@ -8,9 +8,9 @@
 
 namespace Meritoo\Common\Utilities;
 
-use Doctrine\Common\Collections\Collection;
 use Doctrine\Common\Util\ClassUtils;
 use Doctrine\Common\Util\Inflector;
+use Meritoo\Common\Collection\Collection;
 use Meritoo\Common\Exception\Reflection\CannotResolveClassNameException;
 use Meritoo\Common\Exception\Reflection\MissingChildClassesException;
 use Meritoo\Common\Exception\Reflection\TooManyChildClassesException;
@@ -74,8 +74,8 @@ class Reflection
     }
 
     /**
-     * Returns maximum constant from all constants of given class / object.
+     * Returns maximum integer value of constant of given class / object.
-     * Values of constants should be integers.
+     * Constants whose values are integers are considered only.
      *
      * @param object|string $class The object or name of object's class
      * @return int|null
@@ -201,7 +201,7 @@ class Reflection
              * Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
              * 2016-11-07
              */
-            if ($object !== null) {
+            if (null !== $object) {
                 unset($exploded[0]);
 
                 $property = implode('.', $exploded);
@@ -229,32 +229,45 @@ class Reflection
                 if ($class->hasProperty($property) || $force) {
                     $property = Inflector::classify($property);
 
-                    $methodPrefixes = [
+                    $getterPrefixes = [
                         'get',
                         'has',
                         'is',
                     ];
 
-                    foreach ($methodPrefixes as $prefix) {
+                    foreach ($getterPrefixes as $prefix) {
-                        $method = sprintf('%s%s', $prefix, $property);
+                        $getterName = sprintf('%s%s', $prefix, $property);
 
-                        if ($class->hasMethod($method)) {
+                        if ($class->hasMethod($getterName)) {
-                            $value = $object->{$method}();
+                            $method = new ReflectionMethod($object, $getterName);
+
+                            /*
+                             * Getter is not accessible publicly?
+                             * I have to skip it, to avoid an error like this:
+                             *
+                             * Call to protected method My\ExtraClass::getExtraProperty() from context 'My\ExtraClass'
+                             */
+                            if ($method->isProtected() || $method->isPrivate()) {
+                                continue;
+                            }
+
+                            $value = $object->{$getterName}();
                             $valueFound = true;
                             break;
                         }
                     }
                 }
 
-                if (!$valueFound && $reflectionProperty !== null) {
+                if (!$valueFound && null !== $reflectionProperty) {
                     /*
-                     * Oops, we have got exception.
+                     * Oops, value of the property is still unknown
                      *
                      * 3rd try:
-                     * Let's try modify accessibility of the property and try again to get value.
+                     * Let's modify accessibility of the property and try again to get value
                      */
                     $reflectionProperty->setAccessible(true);
                     $value = $reflectionProperty->getValue($object);
+                    $reflectionProperty->setAccessible(false);
                 }
             }
         }
@@ -275,6 +288,14 @@ class Reflection
      */
     public static function getPropertyValues($objects, $property, $force = false)
     {
+        /*
+         * No objects?
+         * Nothing to do
+         */
+        if (empty($objects)) {
+            return [];
+        }
+
         if ($objects instanceof Collection) {
             $objects = $objects->toArray();
         }
@@ -285,7 +306,7 @@ class Reflection
         foreach ($objects as $entity) {
             $value = self::getPropertyValue($entity, $property, $force);
 
-            if ($value !== null) {
+            if (null !== $value) {
                 $values[] = $value;
             }
         }
@@ -345,7 +366,7 @@ class Reflection
         if ($withoutNamespace) {
             $classOnly = Miscellaneous::getLastElementOfString($name, '\\');
 
-            if ($classOnly !== null) {
+            if (null !== $classOnly) {
                 $name = $classOnly;
             }
 
@@ -418,30 +439,44 @@ class Reflection
      * Returns given object properties
      *
      * @param array|object|string $source         An array of objects, namespaces, object or namespace
-     * @param int                 $filter (optional) Filter of properties. Uses ReflectionProperty class constants.
+     * @param int                 $filter         (optional) Filter of properties. Uses ReflectionProperty class
-     *                                    By default all properties are returned.
+     *                                            constants. By default all properties are returned.
+     * @param bool                $includeParents (optional) If is set to true, properties of parent classes are
+     *                                            included (recursively). Otherwise - not.
      * @return array|ReflectionProperty
      */
-    public static function getProperties($source, $filter = null)
+    public static function getProperties($source, $filter = null, $includeParents = false)
     {
         $className = self::getClassName($source);
         $reflection = new ReflectionClass($className);
 
-        if ($filter === null) {
+        if (null === $filter) {
             $filter = ReflectionProperty::IS_PRIVATE
                 + ReflectionProperty::IS_PROTECTED
                 + ReflectionProperty::IS_PUBLIC
                 + ReflectionProperty::IS_STATIC;
         }
 
-        return $reflection->getProperties($filter);
+        $properties = $reflection->getProperties($filter);
+        $parentProperties = [];
+
+        if ($includeParents) {
+            $parent = self::getParentClass($source);
+
+            if (false !== $parent) {
+                $parentClass = $parent->getName();
+                $parentProperties = self::getProperties($parentClass, $filter, $includeParents);
+            }
+        }
+
+        return array_merge($properties, $parentProperties);
     }
 
     /**
-     * Returns a parent class
+     * Returns a parent class or false if there is no parent class
      *
      * @param array|object|string $source An array of objects, namespaces, object or namespace
-     * @return ReflectionClass
+     * @return ReflectionClass|bool
      */
     public static function getParentClass($source)
     {
@@ -477,7 +512,7 @@ class Reflection
         /*
          * Oops, cannot resolve class
          */
-        if ($className === null) {
+        if (null === $className) {
             throw new CannotResolveClassNameException($class);
         }
 
@@ -603,7 +638,7 @@ class Reflection
         if (!$uses && $verifyParents) {
             $parentClassName = self::getParentClassName($className);
 
-            if ($parentClassName !== null) {
+            if (null !== $parentClassName) {
                 return self::usesTrait($parentClassName, $trait, true);
             }
         }
@@ -624,7 +659,7 @@ class Reflection
         $reflection = new ReflectionClass($className);
         $parentClass = $reflection->getParentClass();
 
-        if ($parentClass === null || $parentClass === false) {
+        if (null === $parentClass || false === $parentClass) {
             return null;
         }
 

src/Utilities/Regex.php

@@ -8,8 +8,8 @@
 
 namespace Meritoo\Common\Utilities;
 
-use Meritoo\Common\Exception\IncorrectColorHexLengthException;
+use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
-use Meritoo\Common\Exception\InvalidColorHexValueException;
+use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
 
 /**
  * Useful regular expressions methods
@@ -84,7 +84,7 @@ class Regex
             $taxid = preg_replace('/[\s-]/', '', $taxidString);
             $sum = 0;
 
-            if (strlen($taxid) == 10 && is_numeric($taxid)) {
+            if (10 == strlen($taxid) && is_numeric($taxid)) {
                 for ($x = 0; $x <= 8; ++$x) {
                     $sum += $taxid[$x] * $weights[$x];
                 }
@@ -185,9 +185,9 @@ class Regex
                         $pattern = '|' . $filterExpression . '|';
                         $matchesCount = preg_match($pattern, $value, $matches);
 
-                        $remove = $matchesCount == 0;
+                        $remove = 0 == $matchesCount;
                     } else {
-                        if ($value == '') {
+                        if ('' == $value) {
                             $value = '\'\'';
                         } elseif (is_string($value)) {
                             $value = '\'' . $value . '\'';
@@ -431,7 +431,7 @@ class Regex
     public static function startsWith($string, $beginning)
     {
         if (!empty($string) && !empty($beginning)) {
-            if (strlen($beginning) == 1 && !self::isLetterOrDigit($beginning)) {
+            if (1 == strlen($beginning) && !self::isLetterOrDigit($beginning)) {
                 $beginning = '\\' . $beginning;
             }
 
@@ -452,7 +452,7 @@ class Regex
      */
     public static function endsWith($string, $ending)
     {
-        if (strlen($ending) == 1 && !self::isLetterOrDigit($ending)) {
+        if (1 == strlen($ending) && !self::isLetterOrDigit($ending)) {
             $ending = '\\' . $ending;
         }
 
@@ -537,7 +537,7 @@ class Regex
      */
     public static function contains($haystack, $needle)
     {
-        if (strlen($needle) == 1 && !self::isLetterOrDigit($needle)) {
+        if (1 == strlen($needle) && !self::isLetterOrDigit($needle)) {
             $needle = '\\' . $needle;
         }
 
@@ -653,7 +653,7 @@ class Regex
         }
 
         $modulo = $sum % 11;
-        $numberControl = ($modulo == 10) ? 0 : $modulo;
+        $numberControl = (10 == $modulo) ? 0 : $modulo;
 
         return $numberControl == $nip[9];
     }
@@ -698,10 +698,10 @@ class Regex
         $color = Miscellaneous::replace($color, '/#/', '');
         $length = strlen($color);
 
-        if ($length === 3) {
+        if (3 === $length) {
             $color = Miscellaneous::replace($color, '/(.)(.)(.)/', '$1$1$2$2$3$3');
         } else {
-            if ($length !== 6) {
+            if (6 !== $length) {
                 if ($throwException) {
                     throw new IncorrectColorHexLengthException($color);
                 }

src/Utilities/Repository.php

@@ -31,14 +31,14 @@ class Repository
     {
         $position = self::getExtremePosition($items, $asLast);
 
-        if ($position === null && $force) {
+        if (null === $position && $force) {
             $position = 0;
         }
 
-        if ($position !== null && !empty($items)) {
+        if (null !== $position && !empty($items)) {
             foreach ($items as $item) {
                 if (method_exists($item, 'getPosition')) {
-                    if ($item->getPosition() === null) {
+                    if (null === $item->getPosition()) {
                         if ($asLast) {
                             ++$position;
                         } else {

src/Utilities/Xml.php

@@ -40,7 +40,7 @@ class Xml
         $query = $path->query('/*/*');
         $nodesCount = $query->length;
 
-        if ($nodesCount == 0) {
+        if (0 == $nodesCount) {
             return $element1;
         }
 

tests/Collection/CollectionTest.php

@@ -0,0 +1,329 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Collection;
+
+use ArrayIterator;
+use Meritoo\Common\Collection\Collection;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of the collection of elements
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class CollectionTest extends BaseTestCase
+{
+    /**
+     * An empty collection
+     *
+     * @var Collection
+     */
+    private $emptyCollection;
+
+    /**
+     * Simple collection
+     *
+     * @var Collection
+     */
+    private $simpleCollection;
+
+    /**
+     * Elements of simple collection
+     *
+     * @var array
+     */
+    private $simpleElements;
+
+    public function testEmptyCollection()
+    {
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertCount(0, $this->emptyCollection);
+        static::assertEmpty($this->emptyCollection);
+
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertEquals([], $this->emptyCollection->toArray());
+        static::assertEmpty($this->emptyCollection->toArray());
+
+        static::assertNull($this->emptyCollection->getFirst());
+        static::assertNull($this->emptyCollection->getLast());
+        static::assertNull($this->emptyCollection[1]);
+        static::assertNull($this->emptyCollection['abc']);
+    }
+
+    public function testNotEmptyCollection()
+    {
+        static::assertEquals(4, $this->simpleCollection->count());
+        static::assertCount(4, $this->simpleCollection);
+        static::assertNotEmpty($this->simpleCollection);
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals($this->simpleElements, $this->simpleCollection->toArray());
+        static::assertNotEmpty($this->simpleCollection->toArray());
+
+        static::assertEquals('lorem', $this->simpleCollection->getFirst());
+        static::assertEquals('sit', $this->simpleCollection->getLast());
+        static::assertEquals('dolor', $this->simpleCollection[123]);
+    }
+
+    public function testCount()
+    {
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertEquals(4, $this->simpleCollection->count());
+    }
+
+    public function testOffsetExists()
+    {
+        static::assertFalse(isset($this->emptyCollection['abc']));
+        static::assertFalse(isset($this->simpleCollection['abc']));
+
+        static::assertTrue(isset($this->simpleCollection[0]));
+        static::assertTrue(isset($this->simpleCollection[345]));
+    }
+
+    public function testOffsetGet()
+    {
+        static::assertNull($this->emptyCollection['abc']);
+        static::assertNull($this->simpleCollection['abc']);
+
+        static::assertEquals('lorem', $this->simpleCollection[0]);
+        static::assertEquals('sit', $this->simpleCollection[345]);
+    }
+
+    public function testOffsetSet()
+    {
+        $this->emptyCollection['test1'] = 1234;
+        $this->simpleCollection['test2'] = 5678;
+
+        static::assertTrue($this->emptyCollection->has(1234));
+        static::assertEquals(1234, $this->emptyCollection['test1']);
+
+        static::assertTrue($this->simpleCollection->has(5678));
+        static::assertEquals(5678, $this->simpleCollection['test2']);
+    }
+
+    public function testOffsetUnset()
+    {
+        unset($this->simpleCollection[0]);
+
+        static::assertFalse($this->simpleCollection->has('lorem'));
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+        static::assertEquals(3, $this->simpleCollection->count());
+
+        unset($this->simpleCollection[123]);
+
+        static::assertFalse($this->simpleCollection->has('dolor'));
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+        static::assertEquals(2, $this->simpleCollection->count());
+    }
+
+    public function testGetIterator()
+    {
+        static::assertInstanceOf(ArrayIterator::class, $this->simpleCollection->getIterator());
+    }
+
+    public function testAdd()
+    {
+        $this->emptyCollection->add('test1');
+
+        static::assertTrue($this->emptyCollection->has('test1'));
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('test1', $this->emptyCollection[0]);
+    }
+
+    public function testAddWithIndex()
+    {
+        $this->emptyCollection->add('test2', 1234);
+
+        static::assertTrue($this->emptyCollection->has('test2'));
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('test2', $this->emptyCollection[1234]);
+    }
+
+    public function testAddMultipleUsingEmptyArray()
+    {
+        $this->emptyCollection->addMultiple([]);
+
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertTrue($this->emptyCollection->isEmpty());
+    }
+
+    public function testAddMultiple()
+    {
+        $elements = [
+            'test1',
+            'test2',
+            1234 => 'test3',
+            5678 => 'test4',
+        ];
+
+        $this->emptyCollection->addMultiple($elements);
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(4, $this->emptyCollection->count());
+
+        static::assertEquals('test1', $this->emptyCollection[0]);
+        static::assertEquals('test2', $this->emptyCollection[1]);
+        static::assertEquals('test3', $this->emptyCollection[2]);
+        static::assertEquals('test4', $this->emptyCollection[3]);
+    }
+
+    public function testAddMultipleUsingIndexes()
+    {
+        $elements = [
+            'test1',
+            'test2',
+            1234 => 'test3',
+            5678 => 'test4',
+        ];
+
+        $this->emptyCollection->addMultiple($elements, true);
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(4, $this->emptyCollection->count());
+
+        static::assertEquals('test1', $this->emptyCollection[0]);
+        static::assertEquals('test2', $this->emptyCollection[1]);
+        static::assertEquals('test3', $this->emptyCollection[1234]);
+        static::assertEquals('test4', $this->emptyCollection[5678]);
+    }
+
+    public function testPrepend()
+    {
+        $this->emptyCollection->prepend('lorem-ipsum');
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('lorem-ipsum', $this->emptyCollection[0]);
+
+        $this->simpleCollection->prepend('lorem-ipsum');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(5, $this->simpleCollection->count());
+        static::assertEquals('lorem-ipsum', $this->simpleCollection[0]);
+    }
+
+    public function testRemoveNotExistingElement()
+    {
+        $this->emptyCollection->remove('abc');
+
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertEquals(0, $this->emptyCollection->count());
+
+        $this->simpleCollection->remove('abc');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(4, $this->simpleCollection->count());
+    }
+
+    public function testRemove()
+    {
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(4, $this->simpleCollection->count());
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+
+        $this->simpleCollection->remove('ipsum');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(3, $this->simpleCollection->count());
+        static::assertNull($this->simpleCollection[1]);
+    }
+
+    public function testIsEmpty()
+    {
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertFalse($this->simpleCollection->isEmpty());
+    }
+
+    public function testIsFirst()
+    {
+        static::assertFalse($this->emptyCollection->isFirst('abc'));
+        static::assertFalse($this->simpleCollection->isFirst('abc'));
+        static::assertFalse($this->simpleCollection->isFirst('dolor'));
+        static::assertTrue($this->simpleCollection->isFirst('lorem'));
+    }
+
+    public function testIsLast()
+    {
+        static::assertFalse($this->emptyCollection->isLast('abc'));
+        static::assertFalse($this->simpleCollection->isLast('abc'));
+        static::assertFalse($this->simpleCollection->isLast('dolor'));
+        static::assertTrue($this->simpleCollection->isLast('sit'));
+    }
+
+    public function testHas()
+    {
+        static::assertFalse($this->emptyCollection->has('abc'));
+        static::assertFalse($this->simpleCollection->has('abc'));
+        static::assertTrue($this->simpleCollection->has('lorem'));
+        static::assertTrue($this->simpleCollection->has('dolor'));
+    }
+
+    public function testGetPrevious()
+    {
+        static::assertNull($this->emptyCollection->getPrevious('abc'));
+        static::assertNull($this->simpleCollection->getPrevious('abc'));
+        static::assertNull($this->simpleCollection->getPrevious('lorem'));
+
+        static::assertEquals('lorem', $this->simpleCollection->getPrevious('ipsum'));
+        static::assertEquals('dolor', $this->simpleCollection->getPrevious('sit'));
+    }
+
+    public function testGetNext()
+    {
+        static::assertNull($this->emptyCollection->getNext('abc'));
+        static::assertNull($this->simpleCollection->getNext('abc'));
+        static::assertNull($this->simpleCollection->getNext('sit'));
+
+        static::assertEquals('dolor', $this->simpleCollection->getNext('ipsum'));
+        static::assertEquals('sit', $this->simpleCollection->getNext('dolor'));
+    }
+
+    public function testGetFirst()
+    {
+        static::assertNull($this->emptyCollection->getFirst());
+        static::assertEquals('lorem', $this->simpleCollection->getFirst());
+    }
+
+    public function testGetLast()
+    {
+        static::assertNull($this->emptyCollection->getLast());
+        static::assertEquals('sit', $this->simpleCollection->getLast());
+    }
+
+    public function testToArray()
+    {
+        static::assertEquals([], $this->emptyCollection->toArray());
+        static::assertEquals($this->simpleElements, $this->simpleCollection->toArray());
+    }
+
+    public function testExistsVisibilityAndArguments()
+    {
+        static::assertMethodVisibilityAndArguments(Collection::class, 'exists', OopVisibilityType::IS_PRIVATE, 1, 1);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->simpleElements = [
+            'lorem',
+            'ipsum',
+            123 => 'dolor',
+            345 => 'sit',
+        ];
+
+        $this->emptyCollection = new Collection();
+        $this->simpleCollection = new Collection($this->simpleElements);
+    }
+}

tests/Exception/Base/UnknownTypeExceptionTest.php

@@ -6,19 +6,26 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Exception\Base;
+namespace Meritoo\Common\Test\Exception\Base;
 
 use Meritoo\Common\Exception\Base\UnknownTypeException;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Type\Base\BaseType;
+use Meritoo\Common\Type\OopVisibilityType;
 
 /**
- * Tests of the exception used while type of something is unknown
+ * Test case of the exception used while type of something is unknown
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class UnknownTypeExceptionTest extends \PHPUnit_Framework_TestCase
+class UnknownTypeExceptionTest extends BaseTestCase
 {
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(UnknownTestTypeException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
     public function testWithoutException()
     {
         self::assertEquals('Test 2', (new TestService())->getTranslatedType('test_2'));
@@ -26,7 +33,7 @@ class UnknownTypeExceptionTest extends \PHPUnit_Framework_TestCase
 
     public function testTheException()
     {
-        $this->expectException(UnknownTestTypeException::class);
+        $this->setExpectedException(UnknownTestTypeException::class);
         self::assertEmpty((new TestService())->getTranslatedType('test_3'));
     }
 }

tests/Exception/Date/UnknownDatePartTypeExceptionTest.php

@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Date;
+
+use Generator;
+use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\DatePartType;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while type of date part, e.g. "year", is unknown
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class UnknownDatePartTypeExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(UnknownDatePartTypeException::class, OopVisibilityType::IS_PUBLIC, 2, 2);
+    }
+
+    /**
+     * @param string $unknownDatePart Type of date part, e.g. "year". One of DatePartType class constants.
+     * @param string $value           Incorrect value
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideDatePartAndValue
+     */
+    public function testConstructorMessage($unknownDatePart, $value, $expectedMessage)
+    {
+        $exception = new UnknownDatePartTypeException($unknownDatePart, $value);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides type of date part, incorrect value and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideDatePartAndValue()
+    {
+        $template = 'The \'%s\' type of date part (with value %s) is unknown. Probably doesn\'t exist or there is a'
+            . ' typo. You should use one of these types: day, hour, minute, month, second, year.';
+
+        yield[
+            DatePartType::DAY,
+            '44',
+            sprintf($template, DatePartType::DAY, '44'),
+        ];
+
+        yield[
+            DatePartType::MONTH,
+            '22',
+            sprintf($template, DatePartType::MONTH, '22'),
+        ];
+
+        yield[
+            DatePartType::MINUTE,
+            '77',
+            sprintf($template, DatePartType::MINUTE, '77'),
+        ];
+    }
+}

tests/Exception/File/EmptyFileExceptionTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\File;
+
+use Generator;
+use Meritoo\Common\Exception\File\EmptyFileException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while file with given path is empty (has no content)
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class EmptyFileExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(EmptyFileException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $emptyFilePath   Path of the empty file
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider providePathOfFile
+     */
+    public function testConstructorMessage($emptyFilePath, $expectedMessage)
+    {
+        $exception = new EmptyFileException($emptyFilePath);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides path of the empty file and expected exception's message
+     *
+     * @return Generator
+     */
+    public function providePathOfFile()
+    {
+        $template = 'File with path \'%s\' is empty (has no content). Did you provide path of proper file?';
+
+        yield[
+            'aa/bb/cc',
+            sprintf($template, 'aa/bb/cc'),
+        ];
+
+        yield[
+            'images/show/car.jpg',
+            sprintf($template, 'images/show/car.jpg'),
+        ];
+    }
+}

tests/Exception/File/EmptyFilePathExceptionTest.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\File;
+
+use Meritoo\Common\Exception\File\EmptyFilePathException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while path of given file is empty
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class EmptyFilePathExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(EmptyFilePathException::class, OopVisibilityType::IS_PUBLIC);
+    }
+
+    public function testConstructorMessage()
+    {
+        $exception = new EmptyFilePathException();
+        static::assertEquals('Path of the file is empty. Did you provide path of proper file?', $exception->getMessage());
+    }
+}

tests/Exception/File/NotExistingFileExceptionTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\File;
+
+use Generator;
+use Meritoo\Common\Exception\File\NotExistingFileException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while file with given path does not exist
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class NotExistingFileExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(NotExistingFileException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $notExistingFilePath Path of not existing (or not readable) file
+     * @param string $expectedMessage     Expected exception's message
+     *
+     * @dataProvider providePathOfFile
+     */
+    public function testConstructorMessage($notExistingFilePath, $expectedMessage)
+    {
+        $exception = new NotExistingFileException($notExistingFilePath);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides path of not existing file and expected exception's message
+     *
+     * @return Generator
+     */
+    public function providePathOfFile()
+    {
+        $template = 'File with path \'%s\' does not exist (or is not readable). Did you provide path of proper file?';
+
+        yield[
+            'aa/bb/cc',
+            sprintf($template, 'aa/bb/cc'),
+        ];
+
+        yield[
+            'images/show/car.jpg',
+            sprintf($template, 'images/show/car.jpg'),
+        ];
+    }
+}

tests/Exception/Method/DisabledMethodExceptionTest.php

@@ -0,0 +1,65 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Method;
+
+use Generator;
+use Meritoo\Common\Exception\Method\DisabledMethodException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while method cannot be called, because is disabled
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class DisabledMethodExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(DisabledMethodException::class, OopVisibilityType::IS_PUBLIC, 2, 1);
+    }
+
+    /**
+     * @param string $disabledMethod    Name of the disabled method
+     * @param string $alternativeMethod Name of the alternative method
+     * @param string $expectedMessage   Expected exception's message
+     *
+     * @internal     param string $emptyFilePath Path of the empty file
+     * @dataProvider provideMethodsNames
+     */
+    public function testConstructorMessage($disabledMethod, $alternativeMethod, $expectedMessage)
+    {
+        $exception = new DisabledMethodException($disabledMethod, $alternativeMethod);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides name of the disabled method, name of the alternative method and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideMethodsNames()
+    {
+        $templateShort = 'Method %s() cannot be called, because is disabled.';
+        $templateLong = $templateShort . ' Use %s() instead.';
+
+        yield[
+            'FooBar::loremIpsum',
+            '',
+            sprintf($templateShort, 'FooBar::loremIpsum'),
+        ];
+
+        yield[
+            'FooBar::loremIpsum',
+            'AnotherClass::alternativeMethod',
+            sprintf($templateLong, 'FooBar::loremIpsum', 'AnotherClass::alternativeMethod'),
+        ];
+    }
+}

tests/Exception/Reflection/CannotResolveClassNameExceptionTest.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Reflection;
+
+use Generator;
+use Meritoo\Common\Exception\Reflection\CannotResolveClassNameException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while name of class or trait cannot be resolved
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class CannotResolveClassNameExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(CannotResolveClassNameException::class, OopVisibilityType::IS_PUBLIC, 2, 1);
+    }
+
+    /**
+     * @param array|object|string $source          Source of the class's / trait's name. It can be an array of objects,
+     *                                             namespaces, object or namespace.
+     * @param bool                $forClass        If is set to true, message of this exception for class is prepared.
+     *                                             Otherwise - for trait.
+     * @param string              $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideClassName
+     */
+    public function testConstructorMessage($source, $forClass, $expectedMessage)
+    {
+        $exception = new CannotResolveClassNameException($source, $forClass);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides source of the class's / trait's name, information if message of this exception should be prepared for
+     * class and the expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideClassName()
+    {
+        yield[
+            'Not\Existing\Class',
+            true,
+            'Name of class from given \'string\' Not\Existing\Class cannot be resolved. Is there everything ok?',
+        ];
+
+        yield[
+            'Not\Existing\Trait',
+            false,
+            'Name of trait from given \'string\' Not\Existing\Trait cannot be resolved. Is there everything ok?',
+        ];
+
+        yield[
+            [
+                new \stdClass(),
+                new \stdClass(),
+            ],
+            true,
+            'Name of class from given \'array\' cannot be resolved. Is there everything ok?',
+        ];
+    }
+}

tests/Exception/Reflection/MissingChildClassesExceptionTest.php

@@ -0,0 +1,65 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Reflection;
+
+use Generator;
+use Meritoo\Common\Exception\Reflection\MissingChildClassesException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while given class has no child classes
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class MissingChildClassesExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(MissingChildClassesException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param array|object|string $parentClass     Class that hasn't child classes, but it should. An array of objects,
+     *                                             strings, object or string.
+     * @param string              $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideParentClass
+     */
+    public function testConstructorMessage($parentClass, $expectedMessage)
+    {
+        $exception = new MissingChildClassesException($parentClass);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides name of class that hasn't child classes, but it should, and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideParentClass()
+    {
+        $template = 'The \'%s\' class requires one child class at least who will extend her (maybe is an abstract'
+            . ' class), but the child classes are missing. Did you forget to extend this class?';
+
+        yield[
+            MissingChildClassesException::class,
+            sprintf($template, MissingChildClassesException::class),
+        ];
+
+        yield[
+            [
+                new \stdClass(),
+                new \stdClass(),
+            ],
+            sprintf($template, \stdClass::class),
+        ];
+    }
+}

tests/Exception/Reflection/TooManyChildClassesExceptionTest.php

@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Reflection;
+
+use Generator;
+use Meritoo\Common\Exception\Reflection\TooManyChildClassesException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while given class has more than one child class
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class TooManyChildClassesExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(TooManyChildClassesException::class, OopVisibilityType::IS_PUBLIC, 2, 2);
+    }
+
+    /**
+     * @param array|object|string $parentClass     Class that has more than one child class, but it shouldn't. An array
+     *                                             of objects, strings, object or string.
+     * @param array               $childClasses    Child classes
+     * @param string              $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideParentAndChildClasses
+     */
+    public function testConstructorMessage($parentClass, array $childClasses, $expectedMessage)
+    {
+        $exception = new TooManyChildClassesException($parentClass, $childClasses);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides name of class that has more than one child class, but it shouldn't, child classes, and expected
+     * exception's message
+     *
+     * @return Generator
+     */
+    public function provideParentAndChildClasses()
+    {
+        $template = "The '%s' class requires one child class at most who will extend her, but more than one child"
+            . " class was found:\n- %s\n\nWhy did you create more than one classes that extend '%s' class?";
+
+        yield[
+            BaseTestCase::class,
+            [
+                \stdClass::class,
+                OopVisibilityType::class,
+            ],
+            sprintf($template, BaseTestCase::class, implode("\n- ", [
+                \stdClass::class,
+                OopVisibilityType::class,
+            ]), BaseTestCase::class),
+        ];
+
+        yield[
+            TooManyChildClassesException::class,
+            [
+                \stdClass::class,
+            ],
+            sprintf($template, TooManyChildClassesException::class, implode("\n- ", [\stdClass::class]), TooManyChildClassesException::class),
+        ];
+    }
+}

tests/Exception/Regex/IncorrectColorHexLengthExceptionTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Regex;
+
+use Generator;
+use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while length of given hexadecimal value of color is incorrect
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class IncorrectColorHexLengthExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(IncorrectColorHexLengthException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $color           Incorrect hexadecimal value of color
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideColor
+     */
+    public function testConstructorMessage($color, $expectedMessage)
+    {
+        $exception = new IncorrectColorHexLengthException($color);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides incorrect hexadecimal value of color and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideColor()
+    {
+        $template = 'Length of hexadecimal value of color \'%s\' is incorrect. It\'s %d, but it should be 3 or 6. Is there everything ok?';
+
+        yield[
+            '',
+            sprintf($template, '', strlen('')),
+        ];
+
+        yield[
+            'aa-bb-cc',
+            sprintf($template, 'aa-bb-cc', strlen('aa-bb-cc')),
+        ];
+    }
+}

tests/Exception/Regex/InvalidColorHexValueExceptionTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Regex;
+
+use Generator;
+use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while given hexadecimal value of color is invalid
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class InvalidColorHexValueExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(InvalidColorHexValueException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $color           Invalid hexadecimal value of color
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideColor
+     */
+    public function testConstructorMessage($color, $expectedMessage)
+    {
+        $exception = new InvalidColorHexValueException($color);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides invalid hexadecimal value of color and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideColor()
+    {
+        $template = 'Hexadecimal value of color \'%s\' is invalid. Is there everything ok?';
+
+        yield[
+            '',
+            sprintf($template, ''),
+        ];
+
+        yield[
+            'aa-bb-cc',
+            sprintf($template, 'aa-bb-cc'),
+        ];
+    }
+}

tests/Exception/Regex/InvalidUrlExceptionTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Regex;
+
+use Generator;
+use Meritoo\Common\Exception\Regex\InvalidUrlException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while url is invalid
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class InvalidUrlExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(InvalidUrlException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $url             Invalid url
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideUrl
+     */
+    public function testConstructorMessage($url, $expectedMessage)
+    {
+        $exception = new InvalidUrlException($url);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides invalid url and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideUrl()
+    {
+        $template = 'Url \'%s\' is invalid. Is there everything ok?';
+
+        yield[
+            'aa/bb/cc',
+            sprintf($template, 'aa/bb/cc'),
+        ];
+
+        yield[
+            'http:/images\show\car.jpg',
+            sprintf($template, 'http:/images\show\car.jpg'),
+        ];
+    }
+}

tests/Exception/Type/UnknownOopVisibilityTypeExceptionTest.php

@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Exception\Type;
+
+use Generator;
+use Meritoo\Common\Exception\Type\UnknownOopVisibilityTypeException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+
+/**
+ * Test case of an exception used while the visibility of a property, a method or (as of PHP 7.1.0) a constant is
+ * unknown
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class UnknownOopVisibilityTypeExceptionTest extends BaseTestCase
+{
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(UnknownOopVisibilityTypeException::class, OopVisibilityType::IS_PUBLIC, 1, 1);
+    }
+
+    /**
+     * @param string $unknownType     Unknown OOP-related visibility
+     * @param string $expectedMessage Expected exception's message
+     *
+     * @dataProvider provideUnknownType
+     */
+    public function testConstructorMessage($unknownType, $expectedMessage)
+    {
+        $exception = new UnknownOopVisibilityTypeException($unknownType);
+        static::assertEquals($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * Provides path of the empty file and expected exception's message
+     *
+     * @return Generator
+     */
+    public function provideUnknownType()
+    {
+        $allTypes = (new OopVisibilityType())->getAll();
+
+        $template = 'The \'%s\' type of OOP-related visibility is unknown. Probably doesn\'t exist or there is a typo.'
+            . ' You should use one of these types: %s.';
+
+        yield[
+            '',
+            sprintf($template, '', implode(', ', $allTypes)),
+        ];
+
+        yield[
+            123,
+            sprintf($template, 123, implode(', ', $allTypes)),
+        ];
+    }
+}

tests/Meritoo/Common/Tests/Utilities/Reflection/A.php

@@ -1,20 +0,0 @@
-<?php
-
-namespace Meritoo\Common\Tests\Utilities\Reflection;
-
-/**
- * The A class.
- * Used for testing the Reflection class.
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class A
-{
-    use E;
-
-    protected function lorem()
-    {
-        return 'ipsum';
-    }
-}

tests/Meritoo/Common/Tests/Utilities/Reflection/B.php

@@ -1,14 +0,0 @@
-<?php
-
-namespace Meritoo\Common\Tests\Utilities\Reflection;
-
-/**
- * The B class.
- * Used for testing the Reflection class.
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class B extends A
-{
-}

tests/Meritoo/Common/Tests/Utilities/Reflection/D.php

@@ -1,14 +0,0 @@
-<?php
-
-namespace Meritoo\Common\Tests\Utilities\Reflection;
-
-/**
- * The D class.
- * Used for testing the Reflection class.
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class D
-{
-}

tests/Meritoo/Common/Tests/Utilities/Reflection/E.php

@@ -1,14 +0,0 @@
-<?php
-
-namespace Meritoo\Common\Tests\Utilities\Reflection;
-
-/**
- * The E trait.
- * Used for testing the Reflection class.
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-trait E
-{
-}

tests/Meritoo/Common/Tests/Utilities/ReflectionTest.php

@@ -1,246 +0,0 @@
-<?php
-
-/**
- * (c) Meritoo.pl, http://www.meritoo.pl
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Meritoo\Common\Tests\Utilities;
-
-use DateTime;
-use Generator;
-use Meritoo\Common\Exception\Reflection\CannotResolveClassNameException;
-use Meritoo\Common\Exception\Reflection\MissingChildClassesException;
-use Meritoo\Common\Exception\Reflection\TooManyChildClassesException;
-use Meritoo\Common\Tests\Utilities\Reflection\A;
-use Meritoo\Common\Tests\Utilities\Reflection\B;
-use Meritoo\Common\Tests\Utilities\Reflection\C;
-use Meritoo\Common\Tests\Utilities\Reflection\D;
-use Meritoo\Common\Tests\Utilities\Reflection\E;
-use Meritoo\Common\Utilities\Reflection;
-use Meritoo\Common\Utilities\TestCase;
-
-/**
- * Tests of the useful reflection methods
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class ReflectionTest extends TestCase
-{
-    /**
-     * @param mixed $invalidClass Empty value, e.g. ""
-     * @dataProvider provideEmptyValue
-     */
-    public function testGetClassNameInvalidClass($invalidClass)
-    {
-        self::assertNull(Reflection::getClassName($invalidClass));
-        self::assertNull(Reflection::getClassName(123));
-    }
-
-    public function testGetClassNameNotExistingClass()
-    {
-        /*
-         * Not existing class
-         */
-        self::assertEquals('', Reflection::getClassName('xyz'));
-        self::assertEquals('', Reflection::getClassName('xyz', true));
-    }
-
-    public function testGetClassNameExistingClass()
-    {
-        /*
-         * Existing class
-         */
-        self::assertEquals(self::class, Reflection::getClassName(self::class));
-        self::assertEquals('ReflectionTest', Reflection::getClassName(self::class, true));
-        self::assertEquals(DateTime::class, Reflection::getClassName(new DateTime()));
-        self::assertEquals(DateTime::class, Reflection::getClassName(new DateTime(), true));
-
-        self::assertEquals(DateTime::class, Reflection::getClassName([
-            new DateTime(),
-            new DateTime('yesterday'),
-        ]));
-    }
-
-    public function testGetClassNameDuplicatedName()
-    {
-        /*
-         * Class with namespace containing name of class (duplicated string)
-         */
-        if (class_exists('Symfony\Bundle\SecurityBundle\SecurityBundle')) {
-            self::assertEquals('Symfony\Bundle\SecurityBundle\SecurityBundle', Reflection::getClassName('Symfony\Bundle\SecurityBundle\SecurityBundle'));
-            self::assertEquals('SecurityBundle', Reflection::getClassName('Symfony\Bundle\SecurityBundle\SecurityBundle', true));
-        }
-    }
-
-    public function testGetClassNamespaceNotExistingClass()
-    {
-        /*
-         * Not existing class
-         */
-        self::assertEquals('', Reflection::getClassNamespace('xyz'));
-    }
-
-    public function testGetClassNamespaceExistingClass()
-    {
-        /*
-         * Existing class
-         */
-        self::assertEquals('Meritoo\Common\Tests\Utilities', Reflection::getClassNamespace(self::class));
-        self::assertEquals(DateTime::class, Reflection::getClassNamespace(new DateTime()));
-
-        self::assertEquals(DateTime::class, Reflection::getClassNamespace([
-            new DateTime(),
-            new DateTime('yesterday'),
-        ]));
-    }
-
-    public function testGetClassNamespaceDuplicatedName()
-    {
-        /*
-         * Class with namespace containing name of class (duplicated string)
-         */
-        if (class_exists('Symfony\Bundle\SecurityBundle\SecurityBundle')) {
-            self::assertEquals('Symfony\Bundle\SecurityBundle', Reflection::getClassNamespace('Symfony\Bundle\SecurityBundle\SecurityBundle'));
-        }
-    }
-
-    /**
-     * @param mixed $invalidClass Empty value, e.g. ""
-     * @dataProvider provideEmptyValue
-     */
-    public function testGetChildClassesInvalidClass($invalidClass)
-    {
-        $this->expectException(CannotResolveClassNameException::class);
-
-        self::assertNull(Reflection::getChildClasses($invalidClass));
-        self::assertNull(Reflection::getChildClasses(123));
-    }
-
-    public function testGetChildClassesNotExistingClass()
-    {
-        $this->expectException(CannotResolveClassNameException::class);
-        self::assertEquals('', Reflection::getChildClasses('xyz'));
-    }
-
-    public function testGetChildClassesExistingClass()
-    {
-        /*
-         * Attention. I have to create instances of these classes to load them and be available while using
-         * get_declared_classes() function in the Reflection::getChildClasses() method. Without these instances the
-         * Reflection::getChildClasses() method returns an empty array even if given class has child classes.
-         */
-        new A();
-        new B();
-        new C();
-
-        $effect = [
-            C::class,
-        ];
-
-        self::assertEquals($effect, Reflection::getChildClasses(B::class));
-
-        $effect = [
-            B::class,
-            C::class,
-        ];
-
-        self::assertEquals($effect, Reflection::getChildClasses(A::class));
-    }
-
-    public function testGetOneChildClassWithMissingChildClasses()
-    {
-        $this->expectException(MissingChildClassesException::class);
-        self::assertEquals('LoremIpsum', Reflection::getOneChildClass(C::class));
-    }
-
-    public function testGetOneChildClassWithTooManyChildClasses()
-    {
-        $this->expectException(TooManyChildClassesException::class);
-
-        self::assertEquals(B::class, Reflection::getOneChildClass(A::class));
-        self::assertEquals(C::class, Reflection::getOneChildClass(A::class));
-    }
-
-    public function testGetOneChildClass()
-    {
-        self::assertEquals(C::class, Reflection::getOneChildClass(B::class));
-    }
-
-    public function testGetMethods()
-    {
-        self::assertEquals(0, count(Reflection::getMethods(B::class, true)));
-        self::assertEquals(1, count(Reflection::getMethods(B::class)));
-        self::assertEquals(1, count(Reflection::getMethods(A::class)));
-        self::assertEquals(2, count(Reflection::getMethods(C::class, true)));
-        self::assertEquals(3, count(Reflection::getMethods(C::class)));
-    }
-
-    /**
-     * @param array|object|string $class An array of objects, namespaces, object or namespace
-     * @param array|string        $trait An array of strings or string
-     *
-     * @dataProvider provideInvalidClassAndTrait
-     */
-    public function testUsesTraitInvalidClass($class, $trait)
-    {
-        $this->expectException(CannotResolveClassNameException::class);
-        self::assertNull(Reflection::usesTrait($class, $trait));
-    }
-
-    /**
-     * @param mixed $trait Empty value, e.g. ""
-     * @dataProvider provideEmptyValue
-     */
-    public function testUsesTraitInvalidTrait($trait)
-    {
-        $this->expectException(CannotResolveClassNameException::class);
-        self::assertNull(Reflection::usesTrait(DateTime::class, $trait));
-    }
-
-    public function testUsesTraitExistingClass()
-    {
-        self::assertTrue(Reflection::usesTrait(A::class, E::class));
-        self::assertFalse(Reflection::usesTrait(B::class, E::class));
-        self::assertFalse(Reflection::usesTrait(C::class, E::class));
-        self::assertFalse(Reflection::usesTrait(D::class, E::class));
-    }
-
-    public function testUsesTraitExistingClassAndVerifyParents()
-    {
-        self::assertTrue(Reflection::usesTrait(A::class, E::class, true));
-        self::assertTrue(Reflection::usesTrait(B::class, E::class, true));
-        self::assertTrue(Reflection::usesTrait(C::class, E::class, true));
-        self::assertFalse(Reflection::usesTrait(D::class, E::class, true));
-    }
-
-    /**
-     * Provides invalid class and trait
-     *
-     * @return Generator
-     */
-    public function provideInvalidClassAndTrait()
-    {
-        yield[
-            '',
-            '',
-        ];
-
-        yield[
-            null,
-            null,
-        ];
-
-        yield[
-            0,
-            0,
-        ];
-
-        yield[
-            [],
-            [],
-        ];
-    }
-}

tests/Test/Base/BaseTestCaseTest.php

@@ -0,0 +1,176 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Test\Base;
+
+use DateTime;
+use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
+use Meritoo\Common\Utilities\GeneratorUtility;
+
+/**
+ * Test case of the base test case with common methods and data providers
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class BaseTestCaseTest extends BaseTestCase
+{
+    public function testConstructor()
+    {
+        static::assertConstructorVisibilityAndArguments(BaseTestCase::class, OopVisibilityType::IS_PUBLIC, 3);
+    }
+
+    public function testProvideEmptyValue()
+    {
+        $elements = [
+            [''],
+            ['   '],
+            [null],
+            [0],
+            [false],
+            [[]],
+        ];
+
+        $generator = (new SimpleTestCase())->provideEmptyValue();
+        self::assertEquals($elements, GeneratorUtility::getGeneratorElements($generator));
+    }
+
+    public function testProvideBooleanValue()
+    {
+        $elements = [
+            [false],
+            [true],
+        ];
+
+        $generator = (new SimpleTestCase())->provideBooleanValue();
+        self::assertEquals($elements, GeneratorUtility::getGeneratorElements($generator));
+    }
+
+    public function testProvideDateTimeInstance()
+    {
+        $dateFormat = 'Y-m-d H:i';
+
+        $expectedElements = [
+            [new DateTime()],
+            [new DateTime('yesterday')],
+            [new DateTime('now')],
+            [new DateTime('tomorrow')],
+        ];
+
+        $generator = (new SimpleTestCase())->provideDateTimeInstance();
+        $generatedElements = GeneratorUtility::getGeneratorElements($generator);
+
+        /* @var DateTime $instance1 */
+        $instance1 = $generatedElements[0][0];
+
+        /* @var DateTime $instance2 */
+        $instance2 = $generatedElements[1][0];
+
+        /* @var DateTime $instance3 */
+        $instance3 = $generatedElements[2][0];
+
+        /* @var DateTime $instance4 */
+        $instance4 = $generatedElements[3][0];
+
+        self::assertCount(count($expectedElements), $generatedElements);
+        self::assertEquals($instance1->format($dateFormat), (new DateTime())->format($dateFormat));
+        self::assertEquals($instance2->format($dateFormat), (new DateTime('yesterday'))->format($dateFormat));
+        self::assertEquals($instance3->format($dateFormat), (new DateTime('now'))->format($dateFormat));
+        self::assertEquals($instance4->format($dateFormat), (new DateTime('tomorrow'))->format($dateFormat));
+    }
+
+    public function testProvideDateTimeRelativeFormat()
+    {
+        $elements = [
+            ['now'],
+            ['yesterday'],
+            ['tomorrow'],
+            ['back of 10'],
+            ['front of 10'],
+            ['last day of February'],
+            ['first day of next month'],
+            ['last day of previous month'],
+            ['last day of next month'],
+            ['Y-m-d'],
+            ['Y-m-d 10:00'],
+        ];
+
+        $generator = (new SimpleTestCase())->provideDateTimeRelativeFormat();
+        self::assertEquals($elements, GeneratorUtility::getGeneratorElements($generator));
+    }
+
+    public function testProvideNotExistingFilePath()
+    {
+        $elements = [
+            ['lets-test.doc'],
+            ['lorem/ipsum.jpg'],
+            ['surprise/me/one/more/time.txt'],
+        ];
+
+        $generator = (new SimpleTestCase())->provideNotExistingFilePath();
+        self::assertEquals($elements, GeneratorUtility::getGeneratorElements($generator));
+    }
+
+    /**
+     * @param string $fileName      Name of file
+     * @param string $directoryPath Path of directory containing the file
+     *
+     * @dataProvider provideFileNameAndDirectoryPath
+     */
+    public function testGetFilePathForTesting($fileName, $directoryPath)
+    {
+        $path = (new SimpleTestCase())->getFilePathForTesting($fileName, $directoryPath);
+
+        if (!empty($directoryPath)) {
+            $directoryPath .= '/';
+        }
+
+        $expectedContains = sprintf('/.data/tests/%s%s', $directoryPath, $fileName);
+        static::assertContains($expectedContains, $path);
+    }
+
+    /**
+     * Provides name of file and path of directory containing the file
+     *
+     * @return Generator
+     */
+    public function provideFileNameAndDirectoryPath()
+    {
+        yield[
+            'abc.jpg',
+            '',
+        ];
+
+        yield[
+            'abc.def.jpg',
+            '',
+        ];
+
+        yield[
+            'abc.jpg',
+            'def',
+        ];
+
+        yield[
+            'abc.def.jpg',
+            'def',
+        ];
+    }
+}
+
+/**
+ * Simple test case
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class SimpleTestCase extends BaseTestCase
+{
+}

tests/Type/Base/BaseTypeTest.php

@@ -6,19 +6,25 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Type\Base;
+namespace Meritoo\Common\Test\Type\Base;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Type\Base\BaseType;
 
 /**
- * Tests of the base / abstract type of something
+ * Test case of the base / abstract type of something
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BaseTypeTest extends \PHPUnit_Framework_TestCase
+class BaseTypeTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(BaseType::class);
+    }
+
     /**
      * @param BaseType $type          Type of something
      * @param array    $expectedTypes Expected concrete types of given instance of type

tests/Type/DatePartTypeTest.php

@@ -6,22 +6,25 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Type;
+namespace Meritoo\Common\Test\Type;
 
-use Generator;
+use Meritoo\Common\Test\Base\BaseTypeTestCase;
 use Meritoo\Common\Type\DatePartType;
 
 /**
- * Tests of the type of date part, e.g. "year"
+ * Test case of the type of date part, e.g. "year"
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePartTypeTest extends \PHPUnit_Framework_TestCase
+class DatePartTypeTest extends BaseTypeTestCase
 {
-    public function testGetAll()
+    /**
+     * {@inheritdoc}
+     */
+    protected function getAllExpectedTypes()
     {
-        $expectedTypes = [
+        return [
             'DAY'    => DatePartType::DAY,
             'HOUR'   => DatePartType::HOUR,
             'MINUTE' => DatePartType::MINUTE,
@@ -29,29 +32,20 @@ class DatePartTypeTest extends \PHPUnit_Framework_TestCase
             'SECOND' => DatePartType::SECOND,
             'YEAR'   => DatePartType::YEAR,
         ];
-
-        $all = (new DatePartType())->getAll();
-        self::assertEquals($expectedTypes, $all);
     }
 
     /**
-     * @param string $toVerifyType Concrete type to verify (of given instance of type)
+     * {@inheritdoc}
-     * @param bool   $isCorrect    Expected information if given type is correct
-     *
-     * @dataProvider provideConcreteType
      */
-    public function testIsCorrectType($toVerifyType, $isCorrect)
+    protected function getTestedTypeInstance()
     {
-        $type = new DatePartType();
+        return new DatePartType();
-        self::assertEquals($isCorrect, $type->isCorrectType($toVerifyType));
     }
 
     /**
-     * Provides type of something for testing the isCorrectType() method
+     * {@inheritdoc}
-     *
-     * @return Generator
      */
-    public function provideConcreteType()
+    public function provideTypeToVerify()
     {
         yield[
             '',

tests/Type/DatePeriodTest.php

@@ -1,20 +1,32 @@
 <?php
 
-namespace Meritoo\Common\Tests\Utilities;
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Type;
 
 use DateTime;
 use Generator;
-use Meritoo\Common\Utilities\DatePeriod;
+use Meritoo\Common\Test\Base\BaseTypeTestCase;
-use Meritoo\Common\Utilities\TestCase;
+use Meritoo\Common\Type\DatePeriod;
+use Meritoo\Common\Type\OopVisibilityType;
 
 /**
- * Tests of date's period
+ * Test case of date's period
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePeriodTest extends TestCase
+class DatePeriodTest extends BaseTypeTestCase
 {
+    public function testConstructorVisibilityAndArguments()
+    {
+        static::assertConstructorVisibilityAndArguments(DatePeriod::class, OopVisibilityType::IS_PUBLIC, 2, 0);
+    }
+
     /**
      * @param DateTime $startDate (optional) Start date of period
      * @param DateTime $endDate   (optional) End date of period
@@ -46,33 +58,6 @@ class DatePeriodTest extends TestCase
         self::assertEquals($endDate, $period->getEndDate());
     }
 
-    /**
-     * @param mixed $period Empty value, e.g. ""
-     * @dataProvider provideEmptyValue
-     */
-    public function testIsCorrectPeriodEmptyPeriod($period)
-    {
-        self::assertFalse(DatePeriod::isCorrectPeriod($period));
-    }
-
-    /**
-     * @param int $period Incorrect period to verify
-     * @dataProvider provideIncorrectPeriod
-     */
-    public function testIsCorrectPeriodIncorrectPeriod($period)
-    {
-        self::assertFalse(DatePeriod::isCorrectPeriod($period));
-    }
-
-    /**
-     * @param int $period The period to verify
-     * @dataProvider providePeriod
-     */
-    public function testIsCorrectPeriod($period)
-    {
-        self::assertTrue(DatePeriod::isCorrectPeriod($period));
-    }
-
     /**
      * @param DatePeriod $period The date period to verify
      * @param string     $format Format used to format the date
@@ -130,36 +115,6 @@ class DatePeriodTest extends TestCase
         ];
     }
 
-    /**
-     * Provides incorrect period
-     *
-     * @return Generator
-     */
-    public function provideIncorrectPeriod()
-    {
-        yield[-1];
-        yield[0];
-        yield[10];
-    }
-
-    /**
-     * Provides period to verify
-     *
-     * @return Generator
-     */
-    public function providePeriod()
-    {
-        yield[DatePeriod::LAST_WEEK];
-        yield[DatePeriod::THIS_WEEK];
-        yield[DatePeriod::NEXT_WEEK];
-        yield[DatePeriod::LAST_MONTH];
-        yield[DatePeriod::THIS_MONTH];
-        yield[DatePeriod::NEXT_MONTH];
-        yield[DatePeriod::LAST_YEAR];
-        yield[DatePeriod::THIS_YEAR];
-        yield[DatePeriod::NEXT_YEAR];
-    }
-
     /**
      * Provides period and incorrect format of date to verify
      *
@@ -258,4 +213,68 @@ class DatePeriodTest extends TestCase
             '2002-02-02 00:00',
         ];
     }
+
+    /**
+     * Returns all expected types of the tested type
+     *
+     * @return array
+     */
+    protected function getAllExpectedTypes()
+    {
+        return [
+            'LAST_MONTH' => DatePeriod::LAST_MONTH,
+            'LAST_WEEK'  => DatePeriod::LAST_WEEK,
+            'LAST_YEAR'  => DatePeriod::LAST_YEAR,
+            'NEXT_MONTH' => DatePeriod::NEXT_MONTH,
+            'NEXT_WEEK'  => DatePeriod::NEXT_WEEK,
+            'NEXT_YEAR'  => DatePeriod::NEXT_YEAR,
+            'THIS_MONTH' => DatePeriod::THIS_MONTH,
+            'THIS_WEEK'  => DatePeriod::THIS_WEEK,
+            'THIS_YEAR'  => DatePeriod::THIS_YEAR,
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getTestedTypeInstance()
+    {
+        return new DatePeriod();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function provideTypeToVerify()
+    {
+        yield[
+            '',
+            false,
+        ];
+
+        yield[
+            -1,
+            false,
+        ];
+
+        yield[
+            true,
+            false,
+        ];
+
+        yield[
+            DatePeriod::LAST_MONTH,
+            true,
+        ];
+
+        yield[
+            DatePeriod::NEXT_WEEK,
+            true,
+        ];
+
+        yield[
+            DatePeriod::THIS_YEAR,
+            true,
+        ];
+    }
 }

tests/Utilities/ArraysTest.php

@@ -6,17 +6,18 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Arrays;
 
 /**
- * Tests of the useful arrays methods
+ * Test case of the useful arrays methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ArraysTest extends \PHPUnit_Framework_TestCase
+class ArraysTest extends BaseTestCase
 {
     private $simpleArray;
     private $simpleArrayWithKeys;
@@ -24,6 +25,11 @@ class ArraysTest extends \PHPUnit_Framework_TestCase
     private $complexArray;
     private $superComplexArray;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Arrays::class);
+    }
+
     public function testValues2string()
     {
         /*

tests/Utilities/BundleTest.php

@@ -6,18 +6,24 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Bundle;
 
 /**
- * Tests of the useful methods for bundle
+ * Test case of the useful methods for bundle
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BundleTest extends \PHPUnit_Framework_TestCase
+class BundleTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Bundle::class);
+    }
+
     public function testGetBundleViewPathEmptyPathAndBundle()
     {
         self::assertNull(Bundle::getBundleViewPath('', ''));

tests/Utilities/ComposerTest.php

@@ -6,18 +6,19 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Composer;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
- * Tests of the useful Composer-related methods
+ * Test case of the useful Composer-related methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ComposerTest extends TestCase
+class ComposerTest extends BaseTestCase
 {
     /**
      * Path of existing composer.json used as source of data for tests
@@ -26,6 +27,11 @@ class ComposerTest extends TestCase
      */
     private $composerJsonPath;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Composer::class);
+    }
+
     /**
      * @param string $composerJsonPath Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -60,7 +66,7 @@ class ComposerTest extends TestCase
     /**
      * Provides names and values of existing nodes
      *
-     * @return \Generator
+     * @return Generator
      */
     public function getExistingNode()
     {
@@ -82,6 +88,6 @@ class ComposerTest extends TestCase
     {
         parent::setUp();
 
-        $this->composerJsonPath = $this->getFilePathToTests(Composer::FILE_NAME_MAIN);
+        $this->composerJsonPath = $this->getFilePathForTesting(Composer::FILE_NAME_MAIN);
     }
 }

tests/Utilities/DateTest.php

@@ -6,23 +6,29 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use DateInterval;
 use DateTime;
 use Generator;
-use Meritoo\Common\Exception\Date\IncorrectDatePartException;
+use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\DatePeriod;
 use Meritoo\Common\Utilities\Date;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
- * Tests of the Date methods (only static functions)
+ * Test case of the Date methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DateTest extends TestCase
+class DateTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Date::class);
+    }
+
     /**
      * @param mixed $value Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -218,7 +224,7 @@ class DateTest extends TestCase
      */
     public function testGetDayOfWeekIncorrectValues($year, $month, $day)
     {
-        $this->expectException(IncorrectDatePartException::class);
+        $this->setExpectedException(UnknownDatePartTypeException::class);
         self::assertEmpty(Date::getDayOfWeek($year, $month, $day));
     }
 
@@ -454,8 +460,11 @@ class DateTest extends TestCase
         $start = 1;
         $end = 100;
 
-        $intervalMinDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
+        $minDate = clone $startDate;
-        $intervalMaxDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $end)));
+        $maxDate = clone $startDate;
+
+        $intervalMinDate = $minDate->add(new DateInterval(sprintf('P%dD', $start)));
+        $intervalMaxDate = $maxDate->add(new DateInterval(sprintf('P%dD', $end)));
 
         $randomDate = Date::getRandomDate();
         self::assertTrue($randomDate >= $intervalMinDate && $randomDate <= $intervalMaxDate);
@@ -471,7 +480,9 @@ class DateTest extends TestCase
     public function testGetRandomDateIncorrectEnd(DateTime $startDate, $start, $end)
     {
         $randomDate = Date::getRandomDate($startDate, $start, $end);
-        $intervalDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
+
+        $cloned = clone $startDate;
+        $intervalDate = $cloned->add(new DateInterval(sprintf('P%dD', $start)));
 
         self::assertTrue($randomDate >= $intervalDate && $randomDate <= $intervalDate);
     }
@@ -487,12 +498,44 @@ class DateTest extends TestCase
     {
         $randomDate = Date::getRandomDate($startDate, $start, $end);
 
-        $intervalMinDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
+        $minDate = clone $startDate;
-        $intervalMaxDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $end)));
+        $maxDate = clone $startDate;
+
+        $intervalMinDate = $minDate->add(new DateInterval(sprintf('P%dD', $start)));
+        $intervalMaxDate = $maxDate->add(new DateInterval(sprintf('P%dD', $end)));
 
         self::assertTrue($randomDate >= $intervalMinDate && $randomDate <= $intervalMaxDate);
     }
 
+    /**
+     * @param mixed $period Empty value, e.g. ""
+     * @dataProvider provideEmptyValue
+     */
+    public function testGetDatesForPeriodUsingEmptyPeriod($period)
+    {
+        self::assertNull(Date::getDatesForPeriod($period));
+    }
+
+    /**
+     * @param int $period Incorrect period to verify
+     * @dataProvider provideIncorrectPeriod
+     */
+    public function testGetDatesForPeriodUsingIncorrectPeriod($period)
+    {
+        self::assertNull(Date::getDatesForPeriod($period));
+    }
+
+    /**
+     * @param int        $period   The period, type of period. One of DatePeriod class constants, e.g. DatePeriod::LAST_WEEK.
+     * @param DatePeriod $expected Expected start and end date for given period
+     *
+     * @dataProvider provideCorrectPeriod
+     */
+    public function testGetDatesForPeriod($period, DatePeriod $expected)
+    {
+        self::assertEquals($expected, Date::getDatesForPeriod($period));
+    }
+
     /**
      * Provides incorrect invalidCount of DateTime
      *
@@ -745,4 +788,112 @@ class DateTest extends TestCase
             50,
         ];
     }
+
+    /**
+     * Provides incorrect period
+     *
+     * @return Generator
+     */
+    public function provideIncorrectPeriod()
+    {
+        yield[-1];
+        yield[0];
+        yield[10];
+    }
+
+    /**
+     * Provides correct period
+     *
+     * @return Generator
+     */
+    public function provideCorrectPeriod()
+    {
+        yield[
+            DatePeriod::LAST_WEEK,
+            new DatePeriod(
+                (new DateTime('this week'))->sub(new DateInterval('P7D'))->setTime(0, 0, 0),
+                (new DateTime('this week'))->sub(new DateInterval('P1D'))->setTime(23, 59, 59)
+            ),
+        ];
+
+        yield[
+            DatePeriod::THIS_WEEK,
+            new DatePeriod(
+                (new DateTime('this week'))->setTime(0, 0, 0),
+                (new DateTime('this week'))->add(new DateInterval('P6D'))->setTime(23, 59, 59)
+            ),
+        ];
+
+        yield[
+            DatePeriod::NEXT_WEEK,
+            new DatePeriod(
+                (new DateTime('this week'))->add(new DateInterval('P7D'))->setTime(0, 0, 0),
+                (new DateTime('this week'))->add(new DateInterval('P7D'))->add(new DateInterval('P6D'))->setTime(23, 59, 59)
+            ),
+        ];
+
+        yield[
+            DatePeriod::LAST_MONTH,
+            new DatePeriod(
+                (new DateTime('first day of last month'))->setTime(0, 0, 0),
+                (new DateTime('last day of last month'))->setTime(23, 59, 59)
+            ),
+        ];
+
+        yield[
+            DatePeriod::THIS_MONTH,
+            new DatePeriod(
+                Date::getDatesForPeriod(DatePeriod::LAST_MONTH)
+                    ->getEndDate()
+                    ->add(new DateInterval('P1D'))
+                    ->setTime(0, 0, 0),
+                Date::getDatesForPeriod(DatePeriod::NEXT_MONTH)
+                    ->getStartDate()
+                    ->sub(new DateInterval('P1D'))
+                    ->setTime(23, 59, 59)
+            ),
+        ];
+
+        yield[
+            DatePeriod::NEXT_MONTH,
+            new DatePeriod(
+                (new DateTime('first day of next month'))->setTime(0, 0, 0),
+                (new DateTime('last day of next month'))->setTime(23, 59, 59)
+            ),
+        ];
+
+        $lastYearStart = (new DateTime())->modify('-1 year');
+        $lastYearEnd = (new DateTime())->modify('-1 year');
+        $year = $lastYearStart->format('Y');
+
+        yield[
+            DatePeriod::LAST_YEAR,
+            new DatePeriod(
+                $lastYearStart->setDate($year, 1, 1)->setTime(0, 0, 0),
+                $lastYearEnd->setDate($year, 12, 31)->setTime(23, 59, 59)
+            ),
+        ];
+
+        $year = (new DateTime())->format('Y');
+
+        yield[
+            DatePeriod::THIS_YEAR,
+            new DatePeriod(
+                (new DateTime())->setDate($year, 1, 1)->setTime(0, 0, 0),
+                (new DateTime())->setDate($year, 12, 31)->setTime(23, 59, 59)
+            ),
+        ];
+
+        $nextYearStart = (new DateTime())->modify('1 year');
+        $nextYearEnd = (new DateTime())->modify('1 year');
+        $year = $nextYearStart->format('Y');
+
+        yield[
+            DatePeriod::NEXT_YEAR,
+            new DatePeriod(
+                $nextYearStart->setDate($year, 1, 1)->setTime(0, 0, 0),
+                $nextYearEnd->setDate($year, 12, 31)->setTime(23, 59, 59)
+            ),
+        ];
+    }
 }

tests/Utilities/GeneratorUtilityTest.php

@@ -6,19 +6,24 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\GeneratorUtility;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
- * Tests of the useful methods for the Generator class
+ * Test case of the useful methods for the Generator class
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class GeneratorUtilityTest extends TestCase
+class GeneratorUtilityTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(GeneratorUtility::class);
+    }
+
     public function testGetGeneratorElements()
     {
         /*

tests/Utilities/LocaleTest.php

@@ -6,20 +6,25 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
- * Tests of the useful locale methods
+ * Test case of the useful locale methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class LocaleTest extends TestCase
+class LocaleTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Locale::class);
+    }
+
     /**
      * @param mixed $languageCode Empty value, e.g. ""
      * @dataProvider provideEmptyValue

tests/Utilities/MimeTypesTest.php

@@ -6,20 +6,25 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\MimeTypes;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
- * Tests of the useful methods for mime types of files
+ * Test case of the useful methods for mime types of files
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class MimeTypesTest extends TestCase
+class MimeTypesTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(MimeTypes::class);
+    }
+
     /**
      * @param mixed $mimeType Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -442,12 +447,12 @@ class MimeTypesTest extends TestCase
     public function provideFilePathToGetMimeTypeOfRealFile()
     {
         yield[
-            $this->getFilePathToTests('minion.jpg'),
+            $this->getFilePathForTesting('minion.jpg'),
             'image/jpeg',
         ];
 
         yield[
-            $this->getFilePathToTests('lorem-ipsum.txt'),
+            $this->getFilePathForTesting('lorem-ipsum.txt'),
             'text/plain',
         ];
     }
@@ -460,12 +465,12 @@ class MimeTypesTest extends TestCase
     public function provideExistingFilePathToCheckIsImagePath()
     {
         yield[
-            $this->getFilePathToTests('minion.jpg'),
+            $this->getFilePathForTesting('minion.jpg'),
             true,
         ];
 
         yield[
-            $this->getFilePathToTests('lorem-ipsum.txt'),
+            $this->getFilePathForTesting('lorem-ipsum.txt'),
             false,
         ];
     }

tests/Utilities/MiscellaneousTest.php

@@ -6,28 +6,33 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
-use Meritoo\Common\Exception\IncorrectColorHexLengthException;
+use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
-use Meritoo\Common\Exception\InvalidColorHexValueException;
+use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
 use Meritoo\Common\Utilities\Miscellaneous;
-use Meritoo\Common\Utilities\TestCase;
 use stdClass;
 
 /**
- * Tests of the Miscellaneous methods (only static functions)
+ * Test case of the Miscellaneous methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class MiscellaneousTest extends TestCase
+class MiscellaneousTest extends BaseTestCase
 {
     private $stringSmall;
     private $stringCommaSeparated;
     private $stringDotSeparated;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Miscellaneous::class);
+    }
+
     public function testGetDirectoryContent()
     {
         $directoryPath = __DIR__ . '/../';
@@ -154,8 +159,8 @@ class MiscellaneousTest extends TestCase
         $expected = "int(123)\n";
 
         if ($xdebugLoaded) {
-            $libraryPath = realpath(sprintf('%s%s', dirname(__FILE__), '/../../../../..'));
+            $libraryPath = realpath(sprintf('%s%s', dirname(__FILE__), '/../..'));
-            $filePath = sprintf('%s%s', $libraryPath, '/src/Meritoo/Common/Utilities/Miscellaneous.php:');
+            $filePath = sprintf('%s%s', $libraryPath, '/src/Utilities/Miscellaneous.php:');
 
             /*
              * Attention. I have to use "\d+" at the end of $filePath, because number of line may be different if new
@@ -503,16 +508,35 @@ class MiscellaneousTest extends TestCase
         self::assertEquals('lorem ipsum', Miscellaneous::trimSmart(' lorem ipsum     '));
     }
 
-    public function testConcatenatePaths()
+    /**
+     * @param mixed $emptyPaths Empty paths co concatenate
+     * @dataProvider provideEmptyValue
+     */
+    public function testConcatenatePathsWithEmptyPaths($emptyPaths)
+    {
+        self::assertEquals('', Miscellaneous::concatenatePaths($emptyPaths));
+    }
+
+    public function testConcatenatePathsWithOneEmptyPath()
+    {
+        $paths = [
+            'first/directory',
+            'second/one',
+            '',
+            'and/the/third',
+        ];
+
+        $concatenated = Miscellaneous::concatenatePaths($paths);
+        unset($paths[2]);
+        $imploded = implode('/', $paths);
+
+        self::assertEquals('/' . $imploded, $concatenated);
+    }
+
+    public function testConcatenatePathsInNixOs()
     {
         /*
-         * Common cases
+         * For *nix operating system
-         */
-        self::assertEquals('', Miscellaneous::concatenatePaths(null));
-        self::assertEquals('', Miscellaneous::concatenatePaths([]));
-
-        /*
-         * *nix operating system
          */
         $paths1 = [
             'first/directory',
@@ -522,7 +546,10 @@ class MiscellaneousTest extends TestCase
 
         self::assertEquals('/' . implode('/', $paths1), Miscellaneous::concatenatePaths($paths1));
         self::assertEquals('/' . implode('/', $paths1), Miscellaneous::concatenatePaths($paths1[0], $paths1[1], $paths1[2]));
+    }
 
+    public function testConcatenatePathsInWindowsOs()
+    {
         /*
          * For Windows operating system
          */
@@ -636,7 +663,8 @@ class MiscellaneousTest extends TestCase
 
     public function testGetInvertedColorWithIncorrectLength()
     {
-        $this->expectException(IncorrectColorHexLengthException::class);
+        $this->setExpectedException(IncorrectColorHexLengthException::class);
+
         Miscellaneous::getInvertedColor(null);
         Miscellaneous::getInvertedColor('');
         Miscellaneous::getInvertedColor(1);
@@ -649,7 +677,8 @@ class MiscellaneousTest extends TestCase
 
     public function testGetInvertedColorWithInvalidValue()
     {
-        $this->expectException(InvalidColorHexValueException::class);
+        $this->setExpectedException(InvalidColorHexValueException::class);
+
         Miscellaneous::getInvertedColor('0011zz');
         Miscellaneous::getInvertedColor('001#zz');
         Miscellaneous::getInvertedColor('001!zz');
@@ -720,6 +749,11 @@ class MiscellaneousTest extends TestCase
         self::assertSame($expected, Miscellaneous::fillMissingZeros($number, $length, $before));
     }
 
+    public function testGetProjectRootPath()
+    {
+        self::assertNotEmpty(Miscellaneous::getProjectRootPath());
+    }
+
     /**
      * Provides string to convert characters to latin characters and not lower cased and not human-readable
      *

tests/Utilities/QueryBuilderUtilityTest.php

@@ -0,0 +1,341 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Utilities;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Query\Expr;
+use Doctrine\ORM\Query\Parameter;
+use Doctrine\ORM\QueryBuilder;
+use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Utilities\QueryBuilderUtility;
+
+/**
+ * Test case of the useful methods for query builder (the Doctrine's QueryBuilder class)
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class QueryBuilderUtilityTest extends BaseTestCase
+{
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(QueryBuilderUtility::class);
+    }
+
+    /**
+     * @param QueryBuilder $queryBuilder The query builder to retrieve root alias
+     * @param null|string  $rootAlias    Expected root alias of given query builder
+     *
+     * @dataProvider provideQueryBuilderAndRootAlias
+     */
+    public function testGetRootAlias(QueryBuilder $queryBuilder, $rootAlias)
+    {
+        static::assertSame($rootAlias, QueryBuilderUtility::getRootAlias($queryBuilder));
+    }
+
+    /**
+     * @param QueryBuilder $queryBuilder  The query builder to verify
+     * @param string       $propertyName  Name of property that maybe is joined
+     * @param null|string  $propertyAlias Expected alias of given property joined in given query builder
+     *
+     * @dataProvider provideQueryBuilderAndPropertyAlias
+     */
+    public function testGetJoinedPropertyAlias(QueryBuilder $queryBuilder, $propertyName, $propertyAlias)
+    {
+        static::assertSame($propertyAlias, QueryBuilderUtility::getJoinedPropertyAlias($queryBuilder, $propertyName));
+    }
+
+    public function testSetCriteriaWithoutCriteria()
+    {
+        $entityManager = $this->getMock(EntityManagerInterface::class);
+        $queryBuilder = new QueryBuilder($entityManager);
+        $newQueryBuilder = QueryBuilderUtility::setCriteria($queryBuilder);
+
+        static::assertSame($queryBuilder, $newQueryBuilder);
+        static::assertCount(0, $newQueryBuilder->getParameters());
+        static::assertNull($newQueryBuilder->getDQLPart('where'));
+    }
+
+    public function testSetCriteriaWithoutAlias()
+    {
+        $criteria = [
+            'lorem' => 11,
+            'ipsum' => 22,
+        ];
+
+        $entityManager = $this->getMock(EntityManagerInterface::class);
+        $queryBuilder = new QueryBuilder($entityManager);
+        $newQueryBuilder = QueryBuilderUtility::setCriteria($queryBuilder, $criteria);
+
+        static::assertSame($queryBuilder, $newQueryBuilder);
+        static::assertCount(count($criteria), $newQueryBuilder->getParameters());
+        static::assertNotNull($newQueryBuilder->getDQLPart('where'));
+    }
+
+    /**
+     * @param QueryBuilder $queryBuilder The query builder
+     * @param array        $criteria     The criteria used in WHERE clause
+     *
+     * @dataProvider provideQueryBuilderAndCriteria
+     */
+    public function testSetCriteria(QueryBuilder $queryBuilder, array $criteria)
+    {
+        $newQueryBuilder = QueryBuilderUtility::setCriteria($queryBuilder, $criteria);
+        $criteriaCount = count($criteria);
+        $nullsCount = 0;
+
+        /*
+         * I have to verify count/amount of NULLs and decrease $criteriaCount, because for null parameter is not added
+         */
+        array_walk($criteria, function ($value) use (&$nullsCount) {
+            if (null === $value) {
+                ++$nullsCount;
+            }
+        });
+
+        static::assertSame($queryBuilder, $newQueryBuilder);
+        static::assertCount($criteriaCount - $nullsCount, $newQueryBuilder->getParameters());
+        static::assertNotNull($newQueryBuilder->getDQLPart('where'));
+    }
+
+    public function testDeleteEntitiesWithoutFlush()
+    {
+        $methods = [
+            'remove',
+            'flush',
+        ];
+
+        $entityManager = $this->getMock(EntityManager::class, $methods, [], '', false);
+        $entities1 = [];
+
+        $entities2 = [
+            new \stdClass(),
+        ];
+
+        static::assertFalse(QueryBuilderUtility::deleteEntities($entityManager, $entities1, false));
+        static::assertTrue(QueryBuilderUtility::deleteEntities($entityManager, $entities2, false));
+    }
+
+    public function testDeleteEntities()
+    {
+        $methods = [
+            'remove',
+            'flush',
+        ];
+
+        $entityManager = $this->getMock(EntityManager::class, $methods, [], '', false);
+        $entities1 = [];
+
+        $entities2 = [
+            new \stdClass(),
+        ];
+
+        static::assertFalse(QueryBuilderUtility::deleteEntities($entityManager, $entities1));
+        static::assertTrue(QueryBuilderUtility::deleteEntities($entityManager, $entities2));
+    }
+
+    /**
+     * @param QueryBuilder          $queryBuilder The query builder
+     * @param array|ArrayCollection $parameters   Parameters to add. Collection of Doctrine\ORM\Query\Parameter
+     *                                            instances or an array with key-value pairs.
+     *
+     * @dataProvider provideQueryBuilderAndParameters
+     */
+    public function testAddParameters(QueryBuilder $queryBuilder, $parameters)
+    {
+        $newQueryBuilder = QueryBuilderUtility::addParameters($queryBuilder, $parameters);
+
+        static::assertSame($queryBuilder, $newQueryBuilder);
+        static::assertCount(count($parameters), $newQueryBuilder->getParameters());
+    }
+
+    /**
+     * Provides query builder to retrieve root alias and expected root alias
+     *
+     * @return Generator
+     */
+    public function provideQueryBuilderAndRootAlias()
+    {
+        $entityManager = $this->getMock(EntityManagerInterface::class);
+
+        yield[
+            new QueryBuilder($entityManager),
+            null,
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))->from('lorem_ipsum', 'lm'),
+            'lm',
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))
+                ->from('lorem', 'l')
+                ->leftJoin('l.ipsum', 'i'),
+            'l',
+        ];
+    }
+
+    /**
+     * Provides query builder, name of property and expected alias of given property
+     *
+     * @return Generator
+     */
+    public function provideQueryBuilderAndPropertyAlias()
+    {
+        $entityManager = $this->getMock(EntityManagerInterface::class);
+
+        yield[
+            new QueryBuilder($entityManager),
+            '',
+            null,
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            'lorem',
+            null,
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))->from('lorem_ipsum', 'lm'),
+            'lm',
+            null,
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))
+                ->from('lorem', 'l')
+                ->leftJoin('l.ipsum', 'i'),
+            'ipsum',
+            'i',
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))
+                ->from('lorem', 'l')
+                ->leftJoin('l.ipsum', 'i')
+                ->innerJoin('i.dolor', 'd'),
+            'ipsum1',
+            null,
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))
+                ->from('lorem', 'l')
+                ->leftJoin('l.ipsum', 'i')
+                ->innerJoin('i.dolor', 'd'),
+            'ipsum',
+            'i',
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))
+                ->from('lorem', 'l')
+                ->leftJoin('l.ipsum', 'i')
+                ->innerJoin('i.dolor', 'd'),
+            'dolor',
+            'd',
+        ];
+    }
+
+    /**
+     * Provides query builder and criteria used in WHERE clause
+     *
+     * @return Generator
+     */
+    public function provideQueryBuilderAndCriteria()
+    {
+        $entityManager = $this->getMock(EntityManager::class, ['getExpressionBuilder'], [], '', false);
+
+        $entityManager
+            ->expects(static::any())
+            ->method('getExpressionBuilder')
+            ->willReturn(new Expr());
+
+        yield[
+            (new QueryBuilder($entityManager))->from('lorem_ipsum', 'lm'),
+            [
+                'lorem' => 11,
+                'ipsum' => 22,
+                'dolor' => null,
+            ],
+        ];
+
+        yield[
+            (new QueryBuilder($entityManager))->from('lorem_ipsum', 'lm'),
+            [
+                'lorem' => [
+                    11,
+                    '>=',
+                ],
+                'ipsum' => [
+                    22,
+                    '<',
+                ],
+                'dolor' => null,
+            ],
+        ];
+    }
+
+    /**
+     * Provides query builder and parameters to add to given query builder
+     *
+     * @return Generator
+     */
+    public function provideQueryBuilderAndParameters()
+    {
+        $entityManager = $this->getMock(EntityManagerInterface::class);
+
+        yield[
+            new QueryBuilder($entityManager),
+            [],
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            new ArrayCollection(),
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            [
+                'lorem' => 11,
+                'ipsum' => 22,
+            ],
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            new ArrayCollection([
+                'lorem' => 11,
+                'ipsum' => 22,
+            ]),
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            [
+                new Parameter('lorem', 11),
+                new Parameter('ipsum', 22),
+            ],
+        ];
+
+        yield[
+            new QueryBuilder($entityManager),
+            new ArrayCollection([
+                new Parameter('lorem', 11),
+                new Parameter('ipsum', 22),
+            ]),
+        ];
+    }
+}

tests/Utilities/Reflection/A.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Utilities\Reflection;
+
+/**
+ * The A class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class A
+{
+    use E;
+
+    private $count = 1;
+
+    protected function lorem()
+    {
+        return 'ipsum';
+    }
+
+    protected function getCount()
+    {
+        return $this->count;
+    }
+}

tests/Utilities/Reflection/B.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Utilities\Reflection;
+
+/**
+ * The B class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class B extends A implements I
+{
+    protected $name = 'Lorem Ipsum';
+
+    public function getName()
+    {
+        return $this->name;
+    }
+}

tests/Utilities/Reflection/C.php

@@ -1,6 +1,12 @@
 <?php
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The C class.

tests/Utilities/Reflection/D.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Test\Utilities\Reflection;
+
+/**
+ * The D class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class D
+{
+}