Readme - TravisCI badge - do not support PHP 7.2, because friendsofphp/php-cs-fixer package can be run using PHP lower than 7.2 only

Details:
$ composer install
Your requirements could not be resolved to an installable set of packages
friendsofphp/php-cs-fixer v2.3.2 requires php ^5.6 || >=7.0 <7.2 -> your PHP version (7.3.0-dev) does not satisfy that requirement

.styleci.yml

@@ -0,0 +1 @@
+preset: symfony

.travis.yml

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

README.md

@@ -1,4 +1,4 @@
-# Meritoo Common Library
+# Meritoo Common Library [![Travis](https://img.shields.io/travis/rust-lang/rust.svg?style=flat-square)](https://travis-ci.org/meritoo/common-library) [![Packagist](https://img.shields.io/packagist/v/meritoo/common-library.svg?style=flat-square)](https://packagist.org/packages/meritoo/common-library) [![StyleCI](https://styleci.io/repos/101790028/shield?branch=master)](https://styleci.io/repos/101790028) [![license](https://img.shields.io/github/license/meritoo/common-library.svg?style=flat-square)](https://github.com/meritoo/common-library) [![GitHub commits](https://img.shields.io/github/commits-since/meritoo/common-library/0.0.1.svg?style=flat-square)](https://github.com/meritoo/common-library) [![Coverage Status](https://coveralls.io/repos/github/meritoo/common-library/badge.svg?branch=master)](https://coveralls.io/github/meritoo/common-library?branch=master)
 Useful classes, methods, extensions etc.
 
 ## Installation
@@ -11,15 +11,93 @@ Run [Composer](https://getcomposer.org) to install new package:
 
 > How to install Composer: https://getcomposer.org/download
 
-## Usage
+## Static methods
 
-This package contains a lot of static methods, so usage is not so complicated. Just run the static method who would you like to use. Example:
+This package contains a lot of class with static methods, so usage is not so complicated. Just run the static method who would you like to use. Example:
 
 ```php
 use Meritoo\Common\Utilities\Arrays;
 
-$firstElement = Arrays::getFirstElement(['lorem' 'ipsum']);
-// result: "lorem"
+$firstElement = Arrays::getFirstElement(['lorem', 'ipsum']);
+var_dump($firstElement); // string(5) "lorem"
+```
+
+## Base test case with common methods and data providers
+
+Located here: `Meritoo\Common\Test\Base\BaseTestCase`. Just extend the `BaseTestCase` class and use it like in `Meritoo\Common\Test\Utilities\DateTest` class:
+
+```php
+class DateTest extends BaseTestCase
+{
+    /**
+     * @param mixed $value Empty value, e.g. ""
+     * @dataProvider provideEmptyValue
+     */
+    public function testGetDateTimeEmptyValue($value)
+    {
+        self::assertFalse(Date::getDateTime($value));
+    }
+
+	(...)
+}
+```
+
+or in `Meritoo\Common\Test\Utilities\MimeTypesTest` class:
+
+```php
+class MimeTypesTest extends BaseTestCase
+{
+	(...)
+
+    /**
+     * @param bool $mimeType The mime type, e.g. "video/mpeg"
+     * @dataProvider provideBooleanValue
+     */
+    public function testGetExtensionBooleanMimeType($mimeType)
+    {
+        self::assertEquals('', MimeTypes::getExtension($mimeType));
+    }
+
+	(...)
+}
+```
+
+## Collection of elements
+
+Located here: `Meritoo\Common\Collection\Collection`. It's a set of some elements, e.g. objects. It's iterable and countable. Provides very useful methods. Some of them:
+- `getFirst()` - returns the first element in the collection
+- `getLast()` - returns the last element in the collection
+- `isEmpty()` - returns information if collection is empty
+- `add($element, $index = null)` - adds given element (at the end of collection)
+- `addMultiple($elements, $useIndexes = false)` - adds given elements (at the end of collection)
+- `prepend($element)` - prepends given element (adds given element at the beginning of collection)
+- `remove($element)` - removes given element
+
+Examples of usage below.
+
+#### An empty collection
+
+```php
+use Meritoo\Common\Collection\Collection;
+
+$emptyCollection = new Collection();
+var_dump($emptyCollection->isEmpty()); // bool(true)
+```
+
+#### Simple collection
+
+```php
+use Meritoo\Common\Collection\Collection;
+
+$elements = [
+    'lorem',
+    'ipsum',
+    123 => 'dolor',
+    345 => 'sit',
+];
+
+$simpleCollection = new Collection($elements);
+var_dump($simpleCollection->has('dolor')); // bool(true)
 ```
 
 Enjoy!

build.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project name="Meritoo Common Library" basedir="." default="build:main" phingVersion="2.14.0">
+<project name="Meritoo Package" basedir="." default="build:main" phingVersion="2.14.0">
     <!-- Properties -->
     <if>
         <available file="phing/properties" property="custom.properties.available"/>

composer.json

@@ -2,7 +2,7 @@
     "name": "meritoo/common-library",
     "description": "Useful classes, methods, extensions etc.",
     "license": "MIT",
-    "version": "0.0.3",
+    "version": "0.0.7",
     "authors": [
         {
             "name": "Meritoo.pl",
@@ -28,7 +28,7 @@
     "autoload": {
         "psr-4": {
             "Meritoo\\Common\\": "src/Meritoo/Common/",
-            "Meritoo\\Common\\Tests\\": "tests/Meritoo/Common/Tests/"
+            "Meritoo\\Common\\Test\\": "tests/Meritoo/Common/Test/"
         }
     }
 }

phing/app.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project name="Meritoo Common Library" basedir="." default="build:main" phingVersion="2.14.0">
+<project name="Meritoo Package" basedir="." default="build:main" phingVersion="2.14.0">
     <!-- Properties -->
     <if>
         <available file="phing/properties" property="custom.properties.available"/>

phing/tests.xml

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

phpunit.xml.dist

@@ -12,7 +12,7 @@
          bootstrap="./vendor/autoload.php"
 >
     <testsuites>
-        <testsuite name="Meritoo's Common Library Test Suite">
+        <testsuite name="Meritoo Package - Main Test Suite">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>

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

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

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

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

src/Meritoo/Common/Exception/Type/UnknownOopVisibilityTypeException.php

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

src/Meritoo/Common/Test/Base/BaseTestCase.php

@@ -0,0 +1,199 @@
+<?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 DateTime;
+use Generator;
+use Meritoo\Common\Exception\Type\UnknownOopVisibilityTypeException;
+use Meritoo\Common\Type\OopVisibilityType;
+use PHPUnit_Framework_TestCase;
+use ReflectionClass;
+use ReflectionMethod;
+
+/**
+ * Base test case with common methods and data providers
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+abstract class BaseTestCase extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Provides an empty value
+     *
+     * @return Generator
+     */
+    public function provideEmptyValue()
+    {
+        yield[''];
+        yield['   '];
+        yield[null];
+        yield[0];
+        yield[false];
+        yield[[]];
+    }
+
+    /**
+     * Provides boolean value
+     *
+     * @return Generator
+     */
+    public function provideBooleanValue()
+    {
+        yield[false];
+        yield[true];
+    }
+
+    /**
+     * Provides instance of DateTime class
+     *
+     * @return Generator
+     */
+    public function provideDateTimeInstance()
+    {
+        yield[new DateTime()];
+        yield[new DateTime('yesterday')];
+        yield[new DateTime('now')];
+        yield[new DateTime('tomorrow')];
+    }
+
+    /**
+     * Provides relative / compound format of DateTime
+     *
+     * @return Generator
+     */
+    public function provideDateTimeRelativeFormat()
+    {
+        yield['now'];
+        yield['yesterday'];
+        yield['tomorrow'];
+        yield['back of 10'];
+        yield['front of 10'];
+        yield['last day of February'];
+        yield['first day of next month'];
+        yield['last day of previous month'];
+        yield['last day of next month'];
+        yield['Y-m-d'];
+        yield['Y-m-d 10:00'];
+    }
+
+    /**
+     * Provides path of not existing file, e.g. "lorem/ipsum.jpg"
+     *
+     * @return Generator
+     */
+    public function provideNotExistingFilePath()
+    {
+        yield['lets-test.doc'];
+        yield['lorem/ipsum.jpg'];
+        yield['surprise/me/one/more/time.txt'];
+    }
+
+    /**
+     * Returns path of file used by tests.
+     * It should be placed in /data/tests directory of this project.
+     *
+     * @param string $fileName      Name of file
+     * @param string $directoryPath (optional) Path of directory containing the file
+     * @return string
+     */
+    public function getFilePathToTests($fileName, $directoryPath = '')
+    {
+        if (!empty($directoryPath)) {
+            $directoryPath = '/' . $directoryPath;
+        }
+
+        return sprintf('%s/../../../../../data/tests/%s%s', __DIR__, $fileName, $directoryPath);
+    }
+
+    /**
+     * Verifies visibility and arguments of method
+     *
+     * @param string                  $classNamespace         Namespace of class that contains method to verify
+     * @param string|ReflectionMethod $method                 Name of method or just the method to verify
+     * @param string                  $visibilityType         Expected visibility of verified method. One of
+     *                                                        OopVisibilityType class constants.
+     * @param int                     $argumentsCount         (optional) Expected count/amount of arguments of the
+     *                                                        verified method
+     * @param int                     $requiredArgumentsCount (optional) Expected count/amount of required arguments
+     *                                                        of the verified method
+     * @throws UnknownOopVisibilityTypeException
+     *
+     * Attention. 2nd argument, the $method, may be:
+     * - string - name of the method
+     * - instance of ReflectionMethod - just the method (provided by ReflectionClass::getMethod() method)
+     */
+    protected function verifyMethodVisibilityAndArguments(
+        $classNamespace,
+        $method,
+        $visibilityType,
+        $argumentsCount = 0,
+        $requiredArgumentsCount = 0
+    ) {
+        /*
+         * Type of visibility is correct?
+         */
+        if (!(new OopVisibilityType())->isCorrectType($visibilityType)) {
+            throw new UnknownOopVisibilityTypeException($visibilityType);
+        }
+
+        $reflection = new ReflectionClass($classNamespace);
+
+        /*
+         * Name of method provided only?
+         * Let's find instance of the method (based on reflection)
+         */
+        if (!$method instanceof ReflectionMethod) {
+            $method = $reflection->getMethod($method);
+        }
+
+        switch ($visibilityType) {
+            case OopVisibilityType::IS_PUBLIC:
+                static::assertTrue($method->isPublic());
+                break;
+
+            case OopVisibilityType::IS_PROTECTED:
+                static::assertTrue($method->isProtected());
+                break;
+
+            case OopVisibilityType::IS_PRIVATE:
+                static::assertTrue($method->isPrivate());
+                break;
+        }
+
+        static::assertEquals($argumentsCount, $method->getNumberOfParameters());
+        static::assertEquals($requiredArgumentsCount, $method->getNumberOfRequiredParameters());
+    }
+
+    /**
+     * Verifies visibility and arguments of class constructor
+     *
+     * @param string $classNamespace         Namespace of class that contains method to verify
+     * @param string $visibilityType         Expected visibility of verified method. One of OopVisibilityType class
+     *                                       constants.
+     * @param int    $argumentsCount         (optional) Expected count/amount of arguments of the verified method
+     * @param int    $requiredArgumentsCount (optional) Expected count/amount of required arguments of the verified
+     *                                       method
+     * @throws UnknownOopVisibilityTypeException
+     */
+    protected function verifyConstructorVisibilityAndArguments(
+        $classNamespace,
+        $visibilityType,
+        $argumentsCount = 0,
+        $requiredArgumentsCount = 0
+    ) {
+        /*
+         * Let's grab the constructor
+         */
+        $reflection = new ReflectionClass($classNamespace);
+        $method = $reflection->getConstructor();
+
+        return $this->verifyMethodVisibilityAndArguments($classNamespace, $method, $visibilityType, $argumentsCount, $requiredArgumentsCount);
+    }
+}

src/Meritoo/Common/Test/Base/BaseTypeTestCase.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Meritoo\Common\Test\Base;
+
+use Generator;
+use Meritoo\Common\Type\Base\BaseType;
+
+/**
+ * Base test case for the type of something
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+abstract class BaseTypeTestCase extends BaseTestCase
+{
+    /**
+     * Verifies availability of all types
+     */
+    public function testAvailabilityOfAllTypes()
+    {
+        $available = $this->getTestedTypeInstance()->getAll();
+        $all = $this->getAllExpectedTypes();
+
+        static::assertEquals($all, $available);
+    }
+
+    /**
+     * Verifies whether given type is correct or not
+     *
+     * @param string $type     Type to verify
+     * @param bool   $expected Information if given type is correct or not
+     *
+     * @dataProvider provideTypeToVerify
+     */
+    public function testIfGivenTypeIsCorrect($type, $expected)
+    {
+        static::assertEquals($expected, $this->getTestedTypeInstance()->isCorrectType($type));
+    }
+
+    /**
+     * Provides type to verify and information if it's correct
+     *
+     * @return Generator
+     */
+    abstract public function provideTypeToVerify();
+
+    /**
+     * Returns instance of the tested type
+     *
+     * @return BaseType
+     */
+    abstract protected function getTestedTypeInstance();
+
+    /**
+     * Returns all expected types of the tested type
+     *
+     * @return array
+     */
+    abstract protected function getAllExpectedTypes();
+}

src/Meritoo/Common/Type/OopVisibilityType.php

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

src/Meritoo/Common/Utilities/Date.php

@@ -10,7 +10,7 @@ namespace Meritoo\Common\Utilities;
 
 use DateInterval;
 use DateTime;
-use Meritoo\Common\Exception\Date\IncorrectDatePartException;
+use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
 use Meritoo\Common\Type\DatePartType;
 
 /**
@@ -231,7 +231,7 @@ class Date
      * @param int $day   The day value
      *
      * @return int
-     * @throws IncorrectDatePartException
+     * @throws UnknownDatePartTypeException
      */
     public static function getDayOfWeek($year, $month, $day)
     {
@@ -243,21 +243,21 @@ class Date
          * Oops, incorrect year
          */
         if ($year <= 0) {
-            throw new IncorrectDatePartException($year, DatePartType::YEAR);
+            throw new UnknownDatePartTypeException(DatePartType::YEAR, $year);
         }
 
         /*
          * Oops, incorrect month
          */
         if ($month < 1 || $month > 12) {
-            throw new IncorrectDatePartException($month, DatePartType::MONTH);
+            throw new UnknownDatePartTypeException(DatePartType::MONTH, $month);
         }
 
         /*
          * Oops, incorrect day
          */
         if ($day < 1 || $day > 31) {
-            throw new IncorrectDatePartException($day, DatePartType::DAY);
+            throw new UnknownDatePartTypeException(DatePartType::DAY, $day);
         }
 
         if ($month < 3) {

src/Meritoo/Common/Utilities/TestCase.php

@@ -1,109 +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\Utilities;
-
-use DateTime;
-use Generator;
-
-/**
- * Test case with common methods and data providers
- *
- * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
- * @copyright Meritoo.pl
- */
-class TestCase extends \PHPUnit_Framework_TestCase
-{
-    /**
-     * Provides an empty value
-     *
-     * @return Generator
-     */
-    public function provideEmptyValue()
-    {
-        yield[''];
-        yield['   '];
-        yield[null];
-        yield[0];
-        yield[false];
-        yield[[]];
-    }
-
-    /**
-     * Provides boolean value
-     *
-     * @return Generator
-     */
-    public function provideBooleanValue()
-    {
-        yield[false];
-        yield[true];
-    }
-
-    /**
-     * Provides instance of DateTime class
-     *
-     * @return Generator
-     */
-    public function provideDateTimeInstance()
-    {
-        yield[new DateTime()];
-        yield[new DateTime('yesterday')];
-        yield[new DateTime('now')];
-        yield[new DateTime('tomorrow')];
-    }
-
-    /**
-     * Provides relative / compound format of DateTime
-     *
-     * @return Generator
-     */
-    public function provideDateTimeRelativeFormat()
-    {
-        yield['now'];
-        yield['yesterday'];
-        yield['tomorrow'];
-        yield['back of 10'];
-        yield['front of 10'];
-        yield['last day of February'];
-        yield['first day of next month'];
-        yield['last day of previous month'];
-        yield['last day of next month'];
-        yield['Y-m-d'];
-        yield['Y-m-d 10:00'];
-    }
-
-    /**
-     * Provides path of not existing file, e.g. "lorem/ipsum.jpg"
-     *
-     * @return Generator
-     */
-    public function provideNotExistingFilePath()
-    {
-        yield['lets-test.doc'];
-        yield['lorem/ipsum.jpg'];
-        yield['suprise/me/one/more/time.txt'];
-    }
-
-    /**
-     * Returns path of file used by tests.
-     * It should be placed in /data/tests directory of this project.
-     *
-     * @param string $fileName      Name of file
-     * @param string $directoryPath (optional) Path of directory containing the file
-     * @return string
-     */
-    public function getFilePathToTests($fileName, $directoryPath = '')
-    {
-        if (!empty($directoryPath)) {
-            $directoryPath = '/' . $directoryPath;
-        }
-
-        return sprintf('%s/../../../../data/tests/%s%s', __DIR__, $fileName, $directoryPath);
-    }
-}

tests/Meritoo/Common/Test/Collection/CollectionTest.php

@@ -6,12 +6,12 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Collection;
+namespace Meritoo\Common\Test\Collection;
 
 use ArrayIterator;
 use Meritoo\Common\Collection\Collection;
-use PHPUnit_Framework_TestCase;
-use ReflectionClass;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
 
 /**
  * Tests of the collection of elements
@@ -19,7 +19,7 @@ use ReflectionClass;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class CollectionTest extends PHPUnit_Framework_TestCase
+class CollectionTest extends BaseTestCase
 {
     /**
      * An empty collection
@@ -306,12 +306,7 @@ class CollectionTest extends PHPUnit_Framework_TestCase
 
     public function testExistsVisibilityAndArguments()
     {
-        $reflection = new ReflectionClass(Collection::class);
-        $method = $reflection->getMethod('exists');
-
-        self::assertTrue($method->isPrivate());
-        self::assertEquals(1, $method->getNumberOfParameters());
-        self::assertEquals(1, $method->getNumberOfRequiredParameters());
+        $this->verifyMethodVisibilityAndArguments(Collection::class, 'exists', OopVisibilityType::IS_PRIVATE, 1, 1);
     }
 
     /**

tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php

@@ -6,10 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Exception\Base;
+namespace Meritoo\Common\Test\Exception\Base;
 
 use Meritoo\Common\Exception\Base\UnknownTypeException;
 use Meritoo\Common\Type\Base\BaseType;
+use PHPUnit_Framework_TestCase;
 
 /**
  * Tests of the exception used while type of something is unknown
@@ -17,7 +18,7 @@ use Meritoo\Common\Type\Base\BaseType;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class UnknownTypeExceptionTest extends \PHPUnit_Framework_TestCase
+class UnknownTypeExceptionTest extends PHPUnit_Framework_TestCase
 {
     public function testWithoutException()
     {

tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php

@@ -6,10 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Type\Base;
+namespace Meritoo\Common\Test\Type\Base;
 
 use Generator;
 use Meritoo\Common\Type\Base\BaseType;
+use PHPUnit_Framework_TestCase;
 
 /**
  * Tests of the base / abstract type of something
@@ -17,7 +18,7 @@ use Meritoo\Common\Type\Base\BaseType;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BaseTypeTest extends \PHPUnit_Framework_TestCase
+class BaseTypeTest extends PHPUnit_Framework_TestCase
 {
     /**
      * @param BaseType $type          Type of something

tests/Meritoo/Common/Test/Type/DatePartTypeTest.php

@@ -6,9 +6,9 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Type;
+namespace Meritoo\Common\Test\Type;
 
-use Generator;
+use Meritoo\Common\Test\Base\BaseTypeTestCase;
 use Meritoo\Common\Type\DatePartType;
 
 /**
@@ -17,11 +17,14 @@ use Meritoo\Common\Type\DatePartType;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePartTypeTest extends \PHPUnit_Framework_TestCase
+class DatePartTypeTest extends BaseTypeTestCase
 {
-    public function testGetAll()
+    /**
+     * {@inheritdoc}
+     */
+    protected function getAllExpectedTypes()
     {
-        $expectedTypes = [
+        return [
             'DAY'    => DatePartType::DAY,
             'HOUR'   => DatePartType::HOUR,
             'MINUTE' => DatePartType::MINUTE,
@@ -29,29 +32,20 @@ class DatePartTypeTest extends \PHPUnit_Framework_TestCase
             'SECOND' => DatePartType::SECOND,
             'YEAR'   => DatePartType::YEAR,
         ];
-
-        $all = (new DatePartType())->getAll();
-        self::assertEquals($expectedTypes, $all);
     }
 
     /**
-     * @param string $toVerifyType Concrete type to verify (of given instance of type)
-     * @param bool   $isCorrect    Expected information if given type is correct
-     *
-     * @dataProvider provideConcreteType
+     * {@inheritdoc}
      */
-    public function testIsCorrectType($toVerifyType, $isCorrect)
+    protected function getTestedTypeInstance()
     {
-        $type = new DatePartType();
-        self::assertEquals($isCorrect, $type->isCorrectType($toVerifyType));
+        return new DatePartType();
     }
 
     /**
-     * Provides type of something for testing the isCorrectType() method
-     *
-     * @return Generator
+     * {@inheritdoc}
      */
-    public function provideConcreteType()
+    public function provideTypeToVerify()
     {
         yield[
             '',

tests/Meritoo/Common/Test/Utilities/ArraysTest.php

@@ -6,9 +6,10 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Arrays;
+use PHPUnit_Framework_TestCase;
 
 /**
  * Tests of the useful arrays methods
@@ -16,7 +17,7 @@ use Meritoo\Common\Utilities\Arrays;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ArraysTest extends \PHPUnit_Framework_TestCase
+class ArraysTest extends PHPUnit_Framework_TestCase
 {
     private $simpleArray;
     private $simpleArrayWithKeys;

tests/Meritoo/Common/Test/Utilities/BundleTest.php

@@ -6,9 +6,10 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Bundle;
+use PHPUnit_Framework_TestCase;
 
 /**
  * Tests of the useful methods for bundle
@@ -16,7 +17,7 @@ use Meritoo\Common\Utilities\Bundle;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BundleTest extends \PHPUnit_Framework_TestCase
+class BundleTest extends PHPUnit_Framework_TestCase
 {
     public function testGetBundleViewPathEmptyPathAndBundle()
     {

tests/Meritoo/Common/Test/Utilities/ComposerTest.php

@@ -6,10 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Composer;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the useful Composer-related methods
@@ -17,7 +18,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ComposerTest extends TestCase
+class ComposerTest extends BaseTestCase
 {
     /**
      * Path of existing composer.json used as source of data for tests
@@ -60,7 +61,7 @@ class ComposerTest extends TestCase
     /**
      * Provides names and values of existing nodes
      *
-     * @return \Generator
+     * @return Generator
      */
     public function getExistingNode()
     {

tests/Meritoo/Common/Test/Utilities/DatePeriodTest.php

@@ -6,13 +6,13 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use DateTime;
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Type\OopVisibilityType;
 use Meritoo\Common\Utilities\DatePeriod;
-use Meritoo\Common\Utilities\TestCase;
-use ReflectionClass;
 
 /**
  * Tests of date's period
@@ -20,16 +20,11 @@ use ReflectionClass;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DatePeriodTest extends TestCase
+class DatePeriodTest extends BaseTestCase
 {
     public function testConstructorVisibilityAndArguments()
     {
-        $reflection = new ReflectionClass(DatePeriod::class);
-        $constructor = $reflection->getConstructor();
-
-        self::assertTrue($constructor->isPublic());
-        self::assertEquals(2, $constructor->getNumberOfParameters());
-        self::assertEquals(0, $constructor->getNumberOfRequiredParameters());
+        $this->verifyConstructorVisibilityAndArguments(DatePeriod::class, OopVisibilityType::IS_PUBLIC, 2, 0);
     }
 
     /**

tests/Meritoo/Common/Test/Utilities/DateTest.php

@@ -6,14 +6,14 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use DateInterval;
 use DateTime;
 use Generator;
-use Meritoo\Common\Exception\Date\IncorrectDatePartException;
+use Meritoo\Common\Exception\Date\UnknownDatePartTypeException;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Date;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the Date methods (only static functions)
@@ -21,7 +21,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class DateTest extends TestCase
+class DateTest extends BaseTestCase
 {
     /**
      * @param mixed $value Empty value, e.g. ""
@@ -218,7 +218,7 @@ class DateTest extends TestCase
      */
     public function testGetDayOfWeekIncorrectValues($year, $month, $day)
     {
-        $this->expectException(IncorrectDatePartException::class);
+        $this->expectException(UnknownDatePartTypeException::class);
         self::assertEmpty(Date::getDayOfWeek($year, $month, $day));
     }
 
@@ -454,8 +454,11 @@ class DateTest extends TestCase
         $start = 1;
         $end = 100;
 
-        $intervalMinDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
-        $intervalMaxDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $end)));
+        $minDate = clone $startDate;
+        $maxDate = clone $startDate;
+
+        $intervalMinDate = $minDate->add(new DateInterval(sprintf('P%dD', $start)));
+        $intervalMaxDate = $maxDate->add(new DateInterval(sprintf('P%dD', $end)));
 
         $randomDate = Date::getRandomDate();
         self::assertTrue($randomDate >= $intervalMinDate && $randomDate <= $intervalMaxDate);
@@ -471,7 +474,9 @@ class DateTest extends TestCase
     public function testGetRandomDateIncorrectEnd(DateTime $startDate, $start, $end)
     {
         $randomDate = Date::getRandomDate($startDate, $start, $end);
-        $intervalDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
+
+        $cloned = clone $startDate;
+        $intervalDate = $cloned->add(new DateInterval(sprintf('P%dD', $start)));
 
         self::assertTrue($randomDate >= $intervalDate && $randomDate <= $intervalDate);
     }
@@ -487,8 +492,11 @@ class DateTest extends TestCase
     {
         $randomDate = Date::getRandomDate($startDate, $start, $end);
 
-        $intervalMinDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $start)));
-        $intervalMaxDate = (clone $startDate)->add(new DateInterval(sprintf('P%dD', $end)));
+        $minDate = clone $startDate;
+        $maxDate = clone $startDate;
+
+        $intervalMinDate = $minDate->add(new DateInterval(sprintf('P%dD', $start)));
+        $intervalMaxDate = $maxDate->add(new DateInterval(sprintf('P%dD', $end)));
 
         self::assertTrue($randomDate >= $intervalMinDate && $randomDate <= $intervalMaxDate);
     }

tests/Meritoo/Common/Test/Utilities/GeneratorUtilityTest.php

@@ -6,10 +6,10 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\GeneratorUtility;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the useful methods for the Generator class
@@ -17,7 +17,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class GeneratorUtilityTest extends TestCase
+class GeneratorUtilityTest extends BaseTestCase
 {
     public function testGetGeneratorElements()
     {

tests/Meritoo/Common/Test/Utilities/LocaleTest.php

@@ -6,11 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the useful locale methods
@@ -18,7 +18,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class LocaleTest extends TestCase
+class LocaleTest extends BaseTestCase
 {
     /**
      * @param mixed $languageCode Empty value, e.g. ""

tests/Meritoo/Common/Test/Utilities/MimeTypesTest.php

@@ -6,11 +6,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\MimeTypes;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the useful methods for mime types of files
@@ -18,7 +18,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class MimeTypesTest extends TestCase
+class MimeTypesTest extends BaseTestCase
 {
     /**
      * @param mixed $mimeType Empty value, e.g. ""

tests/Meritoo/Common/Test/Utilities/MiscellaneousTest.php

@@ -6,14 +6,14 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Generator;
 use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
 use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
 use Meritoo\Common\Utilities\Miscellaneous;
-use Meritoo\Common\Utilities\TestCase;
 use stdClass;
 
 /**
@@ -22,7 +22,7 @@ use stdClass;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class MiscellaneousTest extends TestCase
+class MiscellaneousTest extends BaseTestCase
 {
     private $stringSmall;
     private $stringCommaSeparated;

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

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The A class.

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

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The B class.

tests/Meritoo/Common/Test/Utilities/Reflection/C.php

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The C class.

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

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The D class.

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

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities\Reflection;
+namespace Meritoo\Common\Test\Utilities\Reflection;
 
 /**
  * The E trait.

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

@@ -6,20 +6,20 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+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\Tests\Utilities\Reflection\A;
-use Meritoo\Common\Tests\Utilities\Reflection\B;
-use Meritoo\Common\Tests\Utilities\Reflection\C;
-use Meritoo\Common\Tests\Utilities\Reflection\D;
-use Meritoo\Common\Tests\Utilities\Reflection\E;
+use Meritoo\Common\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;
-use Meritoo\Common\Utilities\TestCase;
 
 /**
  * Tests of the useful reflection methods
@@ -27,7 +27,7 @@ use Meritoo\Common\Utilities\TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ReflectionTest extends TestCase
+class ReflectionTest extends BaseTestCase
 {
     /**
      * @param mixed $invalidClass Empty value, e.g. ""
@@ -88,7 +88,7 @@ class ReflectionTest extends TestCase
         /*
          * Existing class
          */
-        self::assertEquals('Meritoo\Common\Tests\Utilities', Reflection::getClassNamespace(self::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([

tests/Meritoo/Common/Test/Utilities/UriTest.php

@@ -6,9 +6,9 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
-use Meritoo\Common\Utilities\TestCase;
+use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Uri;
 
 /**
@@ -17,7 +17,7 @@ use Meritoo\Common\Utilities\Uri;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class UriTest extends TestCase
+class UriTest extends BaseTestCase
 {
     public function testAddProtocolToUrl()
     {

tests/Meritoo/Common/Test/Utilities/XmlTest.php

@@ -6,9 +6,10 @@
  * file that was distributed with this source code.
  */
 
-namespace Meritoo\Common\Tests\Utilities;
+namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Xml;
+use PHPUnit_Framework_TestCase;
 use SimpleXMLElement;
 
 /**
@@ -17,7 +18,7 @@ use SimpleXMLElement;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class XmlTest extends \PHPUnit_Framework_TestCase
+class XmlTest extends PHPUnit_Framework_TestCase
 {
     private $simpleXml;
     private $advancedXml;