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
 

.phing/app.xml

@@ -2,12 +2,12 @@
 <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

@@ -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>
 

README.md

@@ -13,6 +13,15 @@ Run [Composer](https://getcomposer.org) to install this package in your project:
 
 > How to install Composer: https://getcomposer.org/download
 
+## Rebuilding project and tests running
+
+```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:

build.xml

@@ -2,12 +2,12 @@
 <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": "0.0.9",
+    "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": "^5.7",
-        "squizlabs/php_codesniffer": "^2.9",
-        "phpmd/phpmd": "^2.6",
-        "sebastian/phpcpd": "^3.0",
+        "friendsofphp/php-cs-fixer": "^2.2",
         "pdepend/pdepend": "^2.5",
-        "phploc/phploc": "^4.0",
-        "friendsofphp/php-cs-fixer": "^2.6"
+        "phploc/phploc": "^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\\Test\\": "tests/Meritoo/Common/Test/"
-        }
+            "Meritoo\\Common\\": "src/"
+        }
+    },
+    "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

@@ -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/Exception/File/NotExistingFileException.php

@@ -23,7 +23,7 @@ class NotExistingFileException extends \Exception
      */
     public function __construct($notExistingFilePath)
     {
-        $template = 'File with path \'%s\' does not exist (or is not readable). Did you provide proper path of file?';
+        $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/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

@@ -6,24 +6,32 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Test\Base;
+namespace Meritoo\Common\Traits\Test\Base;
 
 use DateTime;
 use Generator;
 use Meritoo\Common\Exception\Type\UnknownOopVisibilityTypeException;
 use Meritoo\Common\Type\OopVisibilityType;
-use PHPUnit\Framework\TestCase;
+use Meritoo\Common\Utilities\Miscellaneous;
 use ReflectionClass;
 use ReflectionMethod;
 
 /**
- * Base test case with common methods and data providers
+ * BaseTestCaseTrait
+ * Created on 2017-11-02
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-abstract class BaseTestCase extends TestCase
+trait BaseTestCaseTrait
 {
+    /**
+     * Path of directory with data used by test cases
+     *
+     * @var string
+     */
+    private static $testsDataDirPath = '.data/tests';
+
     /**
      * Provides an empty value
      *
@@ -97,19 +105,24 @@ abstract class BaseTestCase extends TestCase
 
     /**
      * Returns path of file used by tests.
-     * It should be placed in /data/tests directory of this project.
+     * 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, $directoryPath = '')
+    public function getFilePathForTesting($fileName, $directoryPath = '')
     {
-        if (!empty($directoryPath)) {
-            $directoryPath = '/' . $directoryPath;
-        }
+        $rootPath = Miscellaneous::getProjectRootPath();
 
-        return sprintf('%s/../../../../../data/tests/%s%s', __DIR__, $fileName, $directoryPath);
+        $paths = [
+            $rootPath,
+            self::$testsDataDirPath,
+            $directoryPath,
+            $fileName,
+        ];
+
+        return Miscellaneous::concatenatePaths($paths);
     }
 
     /**
@@ -129,7 +142,7 @@ abstract class BaseTestCase extends TestCase
      * - string - name of the method
      * - instance of ReflectionMethod - just the method (provided by ReflectionClass::getMethod() method)
      */
-    protected function verifyMethodVisibilityAndArguments(
+    protected static function assertMethodVisibilityAndArguments(
         $classNamespace,
         $method,
         $visibilityType,
@@ -174,7 +187,7 @@ abstract class BaseTestCase extends TestCase
     /**
      * Verifies visibility and arguments of class constructor
      *
-     * @param string $classNamespace         Namespace of class that contains method to verify
+     * @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
@@ -182,7 +195,7 @@ abstract class BaseTestCase extends TestCase
      *                                       method
      * @throws UnknownOopVisibilityTypeException
      */
-    protected function verifyConstructorVisibilityAndArguments(
+    protected static function assertConstructorVisibilityAndArguments(
         $classNamespace,
         $visibilityType,
         $argumentsCount = 0,
@@ -194,6 +207,32 @@ abstract class BaseTestCase extends TestCase
         $reflection = new ReflectionClass($classNamespace);
         $method = $reflection->getConstructor();
 
-        return $this->verifyMethodVisibilityAndArguments($classNamespace, $method, $visibilityType, $argumentsCount, $requiredArgumentsCount);
+        static::assertMethodVisibilityAndArguments($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

@@ -1,17 +1,23 @@
 <?php
 
-namespace Meritoo\Common\Test\Base;
+/**
+ * (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;
 
 /**
- * Base test case for the type of something
+ * Trait for the base test case for the type of something
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-abstract class BaseTypeTestCase extends BaseTestCase
+trait BaseTypeTestCaseTrait
 {
     /**
      * Verifies availability of all types

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
      *

src/Utilities/Date.php

@@ -12,6 +12,7 @@ use DateInterval;
 use DateTime;
 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;
 
@@ -148,15 +154,18 @@ class Date
                 break;
         }
 
-            if (null !== $dateStart && null !== $dateEnd) {
+        /*
+         * 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 $datePeriod;
+        return new DatePeriod($dateStart, $dateEnd);
     }
 
     /**

src/Utilities/Miscellaneous.php

@@ -1032,6 +1032,8 @@ class Miscellaneous
         $separator = DIRECTORY_SEPARATOR;
 
         foreach ($paths as $path) {
+            $path = trim($path);
+
             /*
              * Empty paths are useless
              */
@@ -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);
         }
@@ -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
-     *                                            Doctrine\ORM\Query\Parameter class or an array with key-value pairs.
+     * @param array|ArrayCollection $parameters   Parameters to add. Collection of Doctrine\ORM\Query\Parameter
+     *                                            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.
-     * Values of constants should be integers.
+     * Returns maximum integer value of constant of given class / object.
+     * Constants whose values are integers are considered only.
      *
      * @param object|string $class The object or name of object's class
      * @return int|null
@@ -229,17 +229,29 @@ class Reflection
                 if ($class->hasProperty($property) || $force) {
                     $property = Inflector::classify($property);
 
-                    $methodPrefixes = [
+                    $getterPrefixes = [
                         'get',
                         'has',
                         'is',
                     ];
 
-                    foreach ($methodPrefixes as $prefix) {
-                        $method = sprintf('%s%s', $prefix, $property);
+                    foreach ($getterPrefixes as $prefix) {
+                        $getterName = sprintf('%s%s', $prefix, $property);
 
-                        if ($class->hasMethod($method)) {
-                            $value = $object->{$method}();
+                        if ($class->hasMethod($getterName)) {
+                            $method = new ReflectionMethod($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;
                         }
@@ -248,13 +260,14 @@ class Reflection
 
                 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();
         }
@@ -418,11 +439,13 @@ 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.
-     *                                    By default all properties are returned.
+     * @param int                 $filter         (optional) Filter of properties. Uses ReflectionProperty class
+     *                                            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);
@@ -434,14 +457,26 @@ class Reflection
                 + 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)
     {

tests/Collection/CollectionTest.php

@@ -14,7 +14,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Type\OopVisibilityType;
 
 /**
- * Tests of the collection of elements
+ * Test case of the collection of elements
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
@@ -306,7 +306,7 @@ class CollectionTest extends BaseTestCase
 
     public function testExistsVisibilityAndArguments()
     {
-        $this->verifyMethodVisibilityAndArguments(Collection::class, 'exists', OopVisibilityType::IS_PRIVATE, 1, 1);
+        static::assertMethodVisibilityAndArguments(Collection::class, 'exists', OopVisibilityType::IS_PRIVATE, 1, 1);
     }
 
     /**

tests/Exception/Base/UnknownTypeExceptionTest.php

@@ -9,17 +9,23 @@
 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 PHPUnit\Framework\TestCase;
+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 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'));
@@ -27,7 +33,7 @@ class UnknownTypeExceptionTest extends 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/Test/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\Test\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\Test\Base\BaseTestCase;
-use Meritoo\Common\Test\Utilities\Reflection\A;
-use Meritoo\Common\Test\Utilities\Reflection\B;
-use Meritoo\Common\Test\Utilities\Reflection\C;
-use Meritoo\Common\Test\Utilities\Reflection\D;
-use Meritoo\Common\Test\Utilities\Reflection\E;
-use Meritoo\Common\Utilities\Reflection;
-
-/**
- * Tests of the useful reflection methods
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class ReflectionTest extends BaseTestCase
-{
-    /**
-     * @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\Test\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

@@ -9,17 +9,22 @@
 namespace Meritoo\Common\Test\Type\Base;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Type\Base\BaseType;
-use PHPUnit\Framework\TestCase;
 
 /**
- * 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 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

@@ -12,7 +12,7 @@ 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

tests/Type/DatePeriodTest.php

@@ -6,25 +6,25 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Test\Utilities;
+namespace Meritoo\Common\Test\Type;
 
 use DateTime;
 use Generator;
-use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Test\Base\BaseTypeTestCase;
+use Meritoo\Common\Type\DatePeriod;
 use Meritoo\Common\Type\OopVisibilityType;
-use Meritoo\Common\Utilities\DatePeriod;
 
 /**
- * Tests of date's period
+ * Test case of date's period
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePeriodTest extends BaseTestCase
+class DatePeriodTest extends BaseTypeTestCase
 {
     public function testConstructorVisibilityAndArguments()
     {
-        $this->verifyConstructorVisibilityAndArguments(DatePeriod::class, OopVisibilityType::IS_PUBLIC, 2, 0);
+        static::assertConstructorVisibilityAndArguments(DatePeriod::class, OopVisibilityType::IS_PUBLIC, 2, 0);
     }
 
     /**
@@ -58,33 +58,6 @@ class DatePeriodTest extends BaseTestCase
         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
@@ -142,36 +115,6 @@ class DatePeriodTest extends BaseTestCase
         ];
     }
 
-    /**
-     * 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
      *
@@ -270,4 +213,68 @@ class DatePeriodTest extends BaseTestCase
             '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

@@ -8,16 +8,16 @@
 
 namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Arrays;
-use PHPUnit\Framework\TestCase;
 
 /**
- * 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 TestCase
+class ArraysTest extends BaseTestCase
 {
     private $simpleArray;
     private $simpleArrayWithKeys;
@@ -25,6 +25,11 @@ class ArraysTest extends TestCase
     private $complexArray;
     private $superComplexArray;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Arrays::class);
+    }
+
     public function testValues2string()
     {
         /*

tests/Utilities/BundleTest.php

@@ -8,17 +8,22 @@
 
 namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Bundle;
-use PHPUnit\Framework\TestCase;
 
 /**
- * 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 TestCase
+class BundleTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Bundle::class);
+    }
+
     public function testGetBundleViewPathEmptyPathAndBundle()
     {
         self::assertNull(Bundle::getBundleViewPath('', ''));

tests/Utilities/ComposerTest.php

@@ -13,7 +13,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Composer;
 
 /**
- * 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
@@ -27,6 +27,11 @@ class ComposerTest extends BaseTestCase
      */
     private $composerJsonPath;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Composer::class);
+    }
+
     /**
      * @param string $composerJsonPath Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -83,6 +88,6 @@ class ComposerTest extends BaseTestCase
     {
         parent::setUp();
 
-        $this->composerJsonPath = $this->getFilePathToTests(Composer::FILE_NAME_MAIN);
+        $this->composerJsonPath = $this->getFilePathForTesting(Composer::FILE_NAME_MAIN);
     }
 }

tests/Utilities/DateTest.php

@@ -13,16 +13,22 @@ use DateTime;
 use Generator;
 use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
 use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\DatePeriod;
 use Meritoo\Common\Utilities\Date;
 
 /**
- * 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 BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Date::class);
+    }
+
     /**
      * @param mixed $value Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -218,7 +224,7 @@ class DateTest extends BaseTestCase
      */
     public function testGetDayOfWeekIncorrectValues($year, $month, $day)
     {
-        $this->expectException(UnknownDatePartTypeException::class);
+        $this->setExpectedException(UnknownDatePartTypeException::class);
         self::assertEmpty(Date::getDayOfWeek($year, $month, $day));
     }
 
@@ -501,6 +507,35 @@ class DateTest extends BaseTestCase
         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
      *
@@ -753,4 +788,112 @@ class DateTest extends BaseTestCase
             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

@@ -12,13 +12,18 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\GeneratorUtility;
 
 /**
- * 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 BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(GeneratorUtility::class);
+    }
+
     public function testGetGeneratorElements()
     {
         /*

tests/Utilities/LocaleTest.php

@@ -13,13 +13,18 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
 
 /**
- * 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 BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Locale::class);
+    }
+
     /**
      * @param mixed $languageCode Empty value, e.g. ""
      * @dataProvider provideEmptyValue

tests/Utilities/MimeTypesTest.php

@@ -13,13 +13,18 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\MimeTypes;
 
 /**
- * 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 BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(MimeTypes::class);
+    }
+
     /**
      * @param mixed $mimeType Empty value, e.g. ""
      * @dataProvider provideEmptyValue
@@ -442,12 +447,12 @@ class MimeTypesTest extends BaseTestCase
     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 BaseTestCase
     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

@@ -17,7 +17,7 @@ use Meritoo\Common\Utilities\Miscellaneous;
 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
@@ -28,6 +28,11 @@ class MiscellaneousTest extends BaseTestCase
     private $stringCommaSeparated;
     private $stringDotSeparated;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Miscellaneous::class);
+    }
+
     public function testGetDirectoryContent()
     {
         $directoryPath = __DIR__ . '/../';
@@ -154,8 +159,8 @@ class MiscellaneousTest extends BaseTestCase
         $expected = "int(123)\n";
 
         if ($xdebugLoaded) {
-            $libraryPath = realpath(sprintf('%s%s', dirname(__FILE__), '/../../../../..'));
-            $filePath = sprintf('%s%s', $libraryPath, '/src/Meritoo/Common/Utilities/Miscellaneous.php:');
+            $libraryPath = realpath(sprintf('%s%s', dirname(__FILE__), '/../..'));
+            $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 BaseTestCase
         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
-         */
-        self::assertEquals('', Miscellaneous::concatenatePaths(null));
-        self::assertEquals('', Miscellaneous::concatenatePaths([]));
-
-        /*
-         * *nix operating system
+         * For *nix operating system
          */
         $paths1 = [
             'first/directory',
@@ -522,7 +546,10 @@ class MiscellaneousTest extends BaseTestCase
 
         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 BaseTestCase
 
     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 BaseTestCase
 
     public function testGetInvertedColorWithInvalidValue()
     {
-        $this->expectException(InvalidColorHexValueException::class);
+        $this->setExpectedException(InvalidColorHexValueException::class);
+
         Miscellaneous::getInvertedColor('0011zz');
         Miscellaneous::getInvertedColor('001#zz');
         Miscellaneous::getInvertedColor('001!zz');
@@ -720,6 +749,11 @@ class MiscellaneousTest extends BaseTestCase
         self::assertSame($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

@@ -19,8 +19,15 @@ 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/F.php

@@ -0,0 +1,54 @@
+<?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 F class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class F
+{
+    protected $username;
+    private $accountBalance;
+    private $city;
+    private $country;
+    private $gInstance;
+
+    public function __construct($accountBalance, $city, $country, $username, $firstName = 'John', $lastName = 'Scott')
+    {
+        $this->accountBalance = $accountBalance;
+        $this->city = $city;
+        $this->country = $country;
+        $this->username = $username;
+        $this->gInstance = new G($firstName, $lastName);
+
+        /*
+         * Called to avoid "Unused private method getAccountBalance" warning only
+         */
+        $this->getAccountBalance();
+    }
+
+    public function getCountry()
+    {
+        return $this->country;
+    }
+
+    protected function getCity()
+    {
+        return $this->city;
+    }
+
+    private function getAccountBalance()
+    {
+        return $this->accountBalance;
+    }
+}

tests/Utilities/Reflection/G.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\Test\Utilities\Reflection;
+
+/**
+ * The G class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class G
+{
+    private $firstName;
+    private $lastName;
+
+    public function __construct($firstName = 'John', $lastName = 'Scott')
+    {
+        $this->firstName = $firstName;
+        $this->lastName = $lastName;
+    }
+
+    public function getFirstName()
+    {
+        return $this->firstName;
+    }
+
+    public function getLastName()
+    {
+        return $this->lastName;
+    }
+}

tests/Utilities/Reflection/H.php

@@ -0,0 +1,27 @@
+<?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 H class.
+ * Used for testing the Reflection class.
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class H
+{
+    const DOLOR = 'sit';
+
+    const LOREM = 'ipsum';
+
+    const MAX_USERS = 5;
+
+    const MIN_USERS = 2;
+}

tests/Utilities/Reflection/I.php

@@ -9,12 +9,12 @@
 namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
- * The B class.
+ * The H interface.
  * Used for testing the Reflection class.
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class B extends A
+interface I
 {
 }

tests/Utilities/ReflectionTest.php

@@ -0,0 +1,504 @@
+<?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 DateTime;
+use Generator;
+use Meritoo\Common\Collection\Collection;
+use Meritoo\Common\Exception\Reflection\CannotResolveClassNameException;
+use Meritoo\Common\Exception\Reflection\MissingChildClassesException;
+use Meritoo\Common\Exception\Reflection\TooManyChildClassesException;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Test\Utilities\Reflection\A;
+use Meritoo\Common\Test\Utilities\Reflection\B;
+use Meritoo\Common\Test\Utilities\Reflection\C;
+use Meritoo\Common\Test\Utilities\Reflection\D;
+use Meritoo\Common\Test\Utilities\Reflection\E;
+use Meritoo\Common\Test\Utilities\Reflection\F;
+use Meritoo\Common\Test\Utilities\Reflection\G;
+use Meritoo\Common\Test\Utilities\Reflection\H;
+use Meritoo\Common\Test\Utilities\Reflection\I;
+use Meritoo\Common\Utilities\Reflection;
+use ReflectionProperty;
+
+/**
+ * Test case of the useful reflection methods
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class ReflectionTest extends BaseTestCase
+{
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Reflection::class);
+    }
+
+    /**
+     * @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\Test\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)
+    {
+        $this->setExpectedException(CannotResolveClassNameException::class);
+
+        self::assertNull(Reflection::getChildClasses($invalidClass));
+        self::assertNull(Reflection::getChildClasses(123));
+    }
+
+    public function testGetChildClassesNotExistingClass()
+    {
+        $this->setExpectedException(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->setExpectedException(MissingChildClassesException::class);
+        self::assertEquals('LoremIpsum', Reflection::getOneChildClass(C::class));
+    }
+
+    public function testGetOneChildClassWithTooManyChildClasses()
+    {
+        $this->setExpectedException(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(1, count(Reflection::getMethods(B::class, true)));
+        self::assertEquals(3, count(Reflection::getMethods(B::class)));
+        self::assertEquals(2, count(Reflection::getMethods(A::class)));
+        self::assertEquals(2, count(Reflection::getMethods(C::class, true)));
+        self::assertEquals(5, 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)
+    {
+        $this->setExpectedException(CannotResolveClassNameException::class);
+        self::assertNull(Reflection::usesTrait($class, $trait));
+    }
+
+    /**
+     * @param mixed $trait Empty value, e.g. ""
+     * @dataProvider provideEmptyValue
+     */
+    public function testUsesTraitInvalidTrait($trait)
+    {
+        $this->setExpectedException(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));
+    }
+
+    public function testGetProperties()
+    {
+        self::assertCount(1, Reflection::getProperties(B::class));
+    }
+
+    public function testGetPropertiesUsingFilter()
+    {
+        self::assertCount(1, Reflection::getProperties(B::class, ReflectionProperty::IS_PROTECTED));
+        self::assertCount(0, Reflection::getProperties(B::class, ReflectionProperty::IS_PRIVATE));
+        self::assertCount(1, Reflection::getProperties(B::class, ReflectionProperty::IS_PRIVATE, true));
+    }
+
+    public function testGetPropertiesWithParents()
+    {
+        self::assertCount(2, Reflection::getProperties(B::class, null, true));
+    }
+
+    public function testGetPropertyValueOfNotExistingProperty()
+    {
+        self::assertNull(Reflection::getPropertyValue(new D(), 'something'));
+        self::assertNull(Reflection::getPropertyValue(new D(), 'something', true));
+    }
+
+    public function testGetPropertyValueFromChain()
+    {
+        $f = new F(1000, 'New York', 'USA', 'john.scott');
+        self::assertEquals('John', Reflection::getPropertyValue($f, 'gInstance.firstName'));
+    }
+
+    public function testGetPropertyValueWithPublicGetter()
+    {
+        $country = 'USA';
+        $f = new F(1000, 'New York', $country, 'john.scott');
+
+        self::assertEquals($country, Reflection::getPropertyValue($f, 'country'));
+    }
+
+    public function testGetPropertyValueWithProtectedGetter()
+    {
+        $city = 'New York';
+        $f = new F(1000, $city, 'USA', 'john.scott');
+
+        self::assertEquals($city, Reflection::getPropertyValue($f, 'city'));
+    }
+
+    public function testGetPropertyValueWithPrivateGetter()
+    {
+        $accountBalance = 1000;
+        $f = new F($accountBalance, 'New York', 'USA', 'john.scott');
+
+        self::assertEquals($accountBalance, Reflection::getPropertyValue($f, 'accountBalance'));
+    }
+
+    public function testGetPropertyValueWithoutGetter()
+    {
+        $username = 'john.scott';
+        $f = new F(1000, 'New York', 'USA', $username);
+
+        self::assertEquals($username, Reflection::getPropertyValue($f, 'username'));
+    }
+
+    public function testGetPropertyValuesFromEmptySource()
+    {
+        self::assertEquals([], Reflection::getPropertyValues([], 'something'));
+        self::assertEquals([], Reflection::getPropertyValues(new Collection(), 'something'));
+    }
+
+    public function testGetPropertyValuesOfNotExistingPropertyFromSingleObject()
+    {
+        self::assertEquals([], Reflection::getPropertyValues(new D(), 'something'));
+        self::assertEquals([], Reflection::getPropertyValues(new D(), 'something', true));
+    }
+
+    public function testGetPropertyValuesOfNotExistingPropertyFromMultipleObjects()
+    {
+        $objects = [
+            new A(),
+            new A(),
+            new A(),
+            new B(),
+            new B(),
+            new C(),
+            new D(),
+        ];
+
+        self::assertEquals([], Reflection::getPropertyValues($objects, 'something'));
+        self::assertEquals([], Reflection::getPropertyValues($objects, 'something', true));
+
+        $collection = new Collection($objects);
+
+        self::assertEquals([], Reflection::getPropertyValues($collection, 'something'));
+        self::assertEquals([], Reflection::getPropertyValues($collection, 'something', true));
+    }
+
+    public function testGetPropertyValuesOfExistingPropertyFromSingleObject()
+    {
+        self::assertEquals(['John'], Reflection::getPropertyValues(new G(), 'firstName'));
+        self::assertEquals(['John'], Reflection::getPropertyValues(new G(), 'firstName', true));
+    }
+
+    public function testGetPropertyValuesOfExistingPropertyFromMultipleObjects()
+    {
+        $expected = [
+            'New York',
+            'London',
+            'Tokyo',
+        ];
+
+        $objects = [
+            new F(1000, 'New York', 'USA', 'john.scott'),
+            new F(2000, 'London', 'GB', 'john.scott'),
+            new F(3000, 'Tokyo', 'Japan', 'john.scott'),
+        ];
+
+        self::assertEquals($expected, Reflection::getPropertyValues($objects, 'city'));
+        self::assertEquals($expected, Reflection::getPropertyValues($objects, 'city', true));
+
+        $collection = new Collection($objects);
+
+        self::assertEquals($expected, Reflection::getPropertyValues($collection, 'city'));
+        self::assertEquals($expected, Reflection::getPropertyValues($collection, 'city', true));
+    }
+
+    public function testGetPropertyValuesFromChainAndSingleObject()
+    {
+        $f = new F(1000, 'New York', 'USA', 'john.scott');
+
+        self::assertEquals(['John'], Reflection::getPropertyValues($f, 'gInstance.firstName'));
+        self::assertEquals(['John'], Reflection::getPropertyValues($f, 'gInstance.firstName', true));
+    }
+
+    public function testGetPropertyValuesFromChainAndMultipleObjects()
+    {
+        $expected = [
+            'John',
+            'Mary',
+            'Peter',
+        ];
+
+        $objects = [
+            new F(1000, 'New York', 'USA', 'john.scott'),
+            new F(2000, 'London', 'GB', 'john.scott', 'Mary', 'Jane'),
+            new F(3000, 'Tokyo', 'Japan', 'john.scott', 'Peter', 'Brown'),
+        ];
+
+        self::assertEquals($expected, Reflection::getPropertyValues($objects, 'gInstance.firstName'));
+        self::assertEquals($expected, Reflection::getPropertyValues($objects, 'gInstance.firstName', true));
+
+        $collection = new Collection($objects);
+
+        self::assertEquals($expected, Reflection::getPropertyValues($collection, 'gInstance.firstName'));
+        self::assertEquals($expected, Reflection::getPropertyValues($collection, 'gInstance.firstName', true));
+    }
+
+    public function testGetMaxNumberConstantUsingClassWithoutConstants()
+    {
+        static::assertNull(Reflection::getMaxNumberConstant(A::class));
+    }
+
+    public function testGetMaxNumberConstant()
+    {
+        static::assertEquals(5, Reflection::getMaxNumberConstant(H::class));
+    }
+
+    public function testHasMethodUsingClassWithoutMethod()
+    {
+        static::assertFalse(Reflection::hasMethod(A::class, 'getUser'));
+    }
+
+    public function testHasMethod()
+    {
+        static::assertTrue(Reflection::hasMethod(A::class, 'getCount'));
+    }
+
+    public function testHasPropertyUsingClassWithoutProperty()
+    {
+        static::assertFalse(Reflection::hasProperty(A::class, 'users'));
+    }
+
+    public function testHasProperty()
+    {
+        static::assertTrue(Reflection::hasProperty(A::class, 'count'));
+    }
+
+    public function testHasConstantUsingClassWithoutConstant()
+    {
+        static::assertFalse(Reflection::hasConstant(H::class, 'users'));
+    }
+
+    public function testHasConstant()
+    {
+        static::assertTrue(Reflection::hasConstant(H::class, 'LOREM'));
+    }
+
+    public function testGetConstantValueUsingClassWithoutConstant()
+    {
+        static::assertNull(Reflection::getConstantValue(H::class, 'users'));
+    }
+
+    public function testGetConstantValue()
+    {
+        static::assertEquals(H::LOREM, Reflection::getConstantValue(H::class, 'LOREM'));
+    }
+
+    public function testIsInterfaceImplementedUsingClassWithoutInterface()
+    {
+        static::assertFalse(Reflection::isInterfaceImplemented(A::class, I::class));
+    }
+
+    public function testIsInterfaceImplemented()
+    {
+        static::assertTrue(Reflection::isInterfaceImplemented(B::class, I::class));
+    }
+
+    public function testIsChildOfClassUsingClassWithoutChildClass()
+    {
+        static::assertFalse(Reflection::isChildOfClass(A::class, B::class));
+    }
+
+    public function testIsChildOfClass()
+    {
+        static::assertTrue(Reflection::isChildOfClass(B::class, A::class));
+    }
+
+    public function testGetPropertyUsingClassWithoutProperty()
+    {
+        static::assertNull(Reflection::getProperty(A::class, 'lorem'));
+    }
+
+    public function testGetPropertyUsingClassWithPrivateProperty()
+    {
+        $property = Reflection::getProperty(A::class, 'count', ReflectionProperty::IS_PRIVATE);
+
+        static::assertInstanceOf(ReflectionProperty::class, $property);
+        static::assertTrue($property->isPrivate());
+        static::assertEquals('count', $property->getName());
+    }
+
+    public function testGetPropertyUsingClassWithProtectedProperty()
+    {
+        $property = Reflection::getProperty(B::class, 'name', ReflectionProperty::IS_PROTECTED);
+
+        static::assertInstanceOf(ReflectionProperty::class, $property);
+        static::assertTrue($property->isProtected());
+        static::assertEquals('name', $property->getName());
+    }
+
+    /**
+     * Provides invalid class and trait
+     *
+     * @return Generator
+     */
+    public function provideInvalidClassAndTrait()
+    {
+        yield[
+            '',
+            '',
+        ];
+
+        yield[
+            null,
+            null,
+        ];
+
+        yield[
+            0,
+            0,
+        ];
+
+        yield[
+            [],
+            [],
+        ];
+    }
+}

tests/Utilities/RegexTest.php

@@ -8,19 +8,24 @@
 
 namespace Meritoo\Common\Utilities;
 
-use PHPUnit\Framework\TestCase;
+use Meritoo\Common\Test\Base\BaseTestCase;
 
 /**
- * Tests of the useful regular expressions methods
+ * Test case of the useful regular expressions methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class RegexTest extends TestCase
+class RegexTest extends BaseTestCase
 {
     private $simpleText;
     private $camelCaseText;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Regex::class);
+    }
+
     public function testGetCamelCaseParts()
     {
         $parts = [];

tests/Utilities/UriTest.php

@@ -12,13 +12,18 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Uri;
 
 /**
- * Tests of the useful uri methods (only static functions)
+ * Test case of the useful uri methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
 class UriTest extends BaseTestCase
 {
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Uri::class);
+    }
+
     public function testAddProtocolToUrl()
     {
         $http = 'http';

tests/Utilities/XmlTest.php

@@ -8,21 +8,26 @@
 
 namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Xml;
-use PHPUnit\Framework\TestCase;
 use SimpleXMLElement;
 
 /**
- * Tests of the useful XML-related methods (only static functions)
+ * Test case of the useful XML-related methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class XmlTest extends TestCase
+class XmlTest extends BaseTestCase
 {
     private $simpleXml;
     private $advancedXml;
 
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Xml::class);
+    }
+
     public function testMergeNodes()
     {
         /*