Collection of elements (class & tests)

.gitignore

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

.idea/.name

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

.idea/Common Library (GitHub).iml

@@ -1,210 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$">
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-      <excludeFolder url="file://$MODULE_DIR$/vendor/doctrine/common" />
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-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="module-library">
-      <library name="PHP" type="php">
-        <CLASSES>
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-          <root url="file://$MODULE_DIR$/vendor/doctrine/annotations" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/cache" />
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-          <root url="file://$MODULE_DIR$/vendor/doctrine/dbal" />
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-          <root url="file://$MODULE_DIR$/vendor/sebastian/recursion-context" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/resource-operations" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/version" />
-          <root url="file://$MODULE_DIR$/vendor/squizlabs/php_codesniffer" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/config" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/console" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/debug" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/dependency-injection" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/event-dispatcher" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/filesystem" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/finder" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/http-foundation" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-mbstring" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php70" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php72" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/process" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/stopwatch" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/yaml" />
-          <root url="file://$MODULE_DIR$/vendor/theseer/fdomdocument" />
-          <root url="file://$MODULE_DIR$/vendor/webmozart/assert" />
-        </CLASSES>
-        <SOURCES>
-          <root url="file://$MODULE_DIR$/vendor/behat/transliterator" />
-          <root url="file://$MODULE_DIR$/vendor/composer" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/annotations" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/cache" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/collections" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/common" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/dbal" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/inflector" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/instantiator" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/lexer" />
-          <root url="file://$MODULE_DIR$/vendor/doctrine/orm" />
-          <root url="file://$MODULE_DIR$/vendor/friendsofphp/php-cs-fixer" />
-          <root url="file://$MODULE_DIR$/vendor/gecko-packages/gecko-php-unit" />
-          <root url="file://$MODULE_DIR$/vendor/gedmo/doctrine-extensions" />
-          <root url="file://$MODULE_DIR$/vendor/myclabs/deep-copy" />
-          <root url="file://$MODULE_DIR$/vendor/paragonie/random_compat" />
-          <root url="file://$MODULE_DIR$/vendor/pdepend/pdepend" />
-          <root url="file://$MODULE_DIR$/vendor/phpdocumentor/reflection-common" />
-          <root url="file://$MODULE_DIR$/vendor/phpdocumentor/reflection-docblock" />
-          <root url="file://$MODULE_DIR$/vendor/phpdocumentor/type-resolver" />
-          <root url="file://$MODULE_DIR$/vendor/phploc/phploc" />
-          <root url="file://$MODULE_DIR$/vendor/phpmd/phpmd" />
-          <root url="file://$MODULE_DIR$/vendor/phpspec/prophecy" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/php-code-coverage" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/php-file-iterator" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/php-text-template" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/php-timer" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/php-token-stream" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/phpunit" />
-          <root url="file://$MODULE_DIR$/vendor/phpunit/phpunit-mock-objects" />
-          <root url="file://$MODULE_DIR$/vendor/psr/container" />
-          <root url="file://$MODULE_DIR$/vendor/psr/log" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/code-unit-reverse-lookup" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/comparator" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/diff" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/environment" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/exporter" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/finder-facade" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/git" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/global-state" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/object-enumerator" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/phpcpd" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/recursion-context" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/resource-operations" />
-          <root url="file://$MODULE_DIR$/vendor/sebastian/version" />
-          <root url="file://$MODULE_DIR$/vendor/squizlabs/php_codesniffer" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/config" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/console" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/debug" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/dependency-injection" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/event-dispatcher" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/filesystem" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/finder" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/http-foundation" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-mbstring" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php70" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php72" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/process" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/stopwatch" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/yaml" />
-          <root url="file://$MODULE_DIR$/vendor/theseer/fdomdocument" />
-          <root url="file://$MODULE_DIR$/vendor/webmozart/assert" />
-        </SOURCES>
-      </library>
-    </orderEntry>
-  </component>
-</module>

.idea/composerJson.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ComposerJsonPluginSettings">
-    <unboundedVersionInspectionSettings>
-      <excludedPackages />
-    </unboundedVersionInspectionSettings>
-    <customRepositories />
-  </component>
-</project>

.idea/encodings.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding">
-    <file url="PROJECT" charset="UTF-8" />
-  </component>
-</project>

.idea/modules.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/Common Library (GitHub).iml" filepath="$PROJECT_DIR$/.idea/Common Library (GitHub).iml" />
-    </modules>
-  </component>
-</project>

.idea/php.xml

@@ -1,75 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="PhpIncludePathManager">
-    <include_path>
-      <path value="$PROJECT_DIR$/vendor/doctrine/inflector" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/annotations" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/lexer" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/common" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/cache" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/instantiator" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/collections" />
-      <path value="$PROJECT_DIR$/vendor/composer" />
-      <path value="$PROJECT_DIR$/vendor/phpspec/prophecy" />
-      <path value="$PROJECT_DIR$/vendor/symfony/yaml" />
-      <path value="$PROJECT_DIR$/vendor/symfony/config" />
-      <path value="$PROJECT_DIR$/vendor/symfony/polyfill-mbstring" />
-      <path value="$PROJECT_DIR$/vendor/symfony/stopwatch" />
-      <path value="$PROJECT_DIR$/vendor/symfony/http-foundation" />
-      <path value="$PROJECT_DIR$/vendor/behat/transliterator" />
-      <path value="$PROJECT_DIR$/vendor/symfony/finder" />
-      <path value="$PROJECT_DIR$/vendor/symfony/filesystem" />
-      <path value="$PROJECT_DIR$/vendor/symfony/event-dispatcher" />
-      <path value="$PROJECT_DIR$/vendor/symfony/polyfill-php70" />
-      <path value="$PROJECT_DIR$/vendor/theseer/fdomdocument" />
-      <path value="$PROJECT_DIR$/vendor/symfony/dependency-injection" />
-      <path value="$PROJECT_DIR$/vendor/symfony/debug" />
-      <path value="$PROJECT_DIR$/vendor/symfony/polyfill-php72" />
-      <path value="$PROJECT_DIR$/vendor/symfony/options-resolver" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/php-code-coverage" />
-      <path value="$PROJECT_DIR$/vendor/symfony/process" />
-      <path value="$PROJECT_DIR$/vendor/symfony/console" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/php-text-template" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/php-timer" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/phpunit-mock-objects" />
-      <path value="$PROJECT_DIR$/vendor/gecko-packages/gecko-php-unit" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/php-token-stream" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/finder-facade" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/php-file-iterator" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/git" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/exporter" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/code-unit-reverse-lookup" />
-      <path value="$PROJECT_DIR$/vendor/webmozart/assert" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/resource-operations" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/version" />
-      <path value="$PROJECT_DIR$/vendor/psr/log" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/diff" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/environment" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/comparator" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/global-state" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/dbal" />
-      <path value="$PROJECT_DIR$/vendor/psr/container" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/object-enumerator" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/recursion-context" />
-      <path value="$PROJECT_DIR$/vendor/friendsofphp/php-cs-fixer" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/type-resolver" />
-      <path value="$PROJECT_DIR$/vendor/phpunit/phpunit" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/reflection-docblock" />
-      <path value="$PROJECT_DIR$/vendor/doctrine/orm" />
-      <path value="$PROJECT_DIR$/vendor/phpdocumentor/reflection-common" />
-      <path value="$PROJECT_DIR$/vendor/pdepend/pdepend" />
-      <path value="$PROJECT_DIR$/vendor/sebastian/phpcpd" />
-      <path value="$PROJECT_DIR$/vendor/phploc/phploc" />
-      <path value="$PROJECT_DIR$/vendor/squizlabs/php_codesniffer" />
-      <path value="$PROJECT_DIR$/vendor/phpmd/phpmd" />
-      <path value="$PROJECT_DIR$/vendor/paragonie/random_compat" />
-      <path value="$PROJECT_DIR$/vendor/myclabs/deep-copy" />
-      <path value="$PROJECT_DIR$/vendor/gedmo/doctrine-extensions" />
-    </include_path>
-  </component>
-  <component name="PhpUnit">
-    <phpunit_settings>
-      <PhpUnitSettings load_method="CUSTOM_LOADER" custom_loader_path="$PROJECT_DIR$/vendor/autoload.php" phpunit_phar_path="" />
-    </phpunit_settings>
-  </component>
-</project>

.idea/webResources.xml

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

README.md

@@ -3,20 +3,7 @@ Useful classes, methods, extensions etc.
 
 ## Installation
 
-#### Composer
+Run [Composer](https://getcomposer.org) to install new package:
-
-1. Open ```composer.json``` and add address of repository in ```repositories``` section:
-
-    ```json
-	"repositories": [
-		{
-			"type": "vcs",
-			"url": "git@github.com:meritoo/common-library.git"
-		}
-	]
-	```
-
-2. Run [Composer](https://getcomposer.org) to install new package:
 
     ```bash
     $ composer require meritoo/common-library

composer.json

@@ -2,7 +2,7 @@
     "name": "meritoo/common-library",
     "description": "Useful classes, methods, extensions etc.",
     "license": "MIT",
-    "version": "0.0.1",
+    "version": "0.0.3",
     "authors": [
         {
             "name": "Meritoo.pl",

src/Meritoo/Common/Collection/Collection.php

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

src/Meritoo/Common/Exception/Regex/IncorrectColorHexLengthException.php

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

src/Meritoo/Common/Exception/Regex/InvalidColorHexValueException.php

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

src/Meritoo/Common/Exception/Regex/InvalidUrlException.php

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

src/Meritoo/Common/Type/DatePartType.php

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

src/Meritoo/Common/Utilities/Regex.php

@@ -8,8 +8,8 @@
 
 namespace Meritoo\Common\Utilities;
 
-use Meritoo\Common\Exception\IncorrectColorHexLengthException;
+use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
-use Meritoo\Common\Exception\InvalidColorHexValueException;
+use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
 
 /**
  * Useful regular expressions methods

src/Meritoo/Common/Utilities/TestCase.php

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

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

@@ -0,0 +1,334 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Tests\Collection;
+
+use ArrayIterator;
+use Meritoo\Common\Collection\Collection;
+use PHPUnit_Framework_TestCase;
+use ReflectionClass;
+
+/**
+ * Tests of the collection of elements
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class CollectionTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * An empty collection
+     *
+     * @var Collection
+     */
+    private $emptyCollection;
+
+    /**
+     * Simple collection
+     *
+     * @var Collection
+     */
+    private $simpleCollection;
+
+    /**
+     * Elements of simple collection
+     *
+     * @var array
+     */
+    private $simpleElements;
+
+    public function testEmptyCollection()
+    {
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertCount(0, $this->emptyCollection);
+        static::assertEmpty($this->emptyCollection);
+
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertEquals([], $this->emptyCollection->toArray());
+        static::assertEmpty($this->emptyCollection->toArray());
+
+        static::assertNull($this->emptyCollection->getFirst());
+        static::assertNull($this->emptyCollection->getLast());
+        static::assertNull($this->emptyCollection[1]);
+        static::assertNull($this->emptyCollection['abc']);
+    }
+
+    public function testNotEmptyCollection()
+    {
+        static::assertEquals(4, $this->simpleCollection->count());
+        static::assertCount(4, $this->simpleCollection);
+        static::assertNotEmpty($this->simpleCollection);
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals($this->simpleElements, $this->simpleCollection->toArray());
+        static::assertNotEmpty($this->simpleCollection->toArray());
+
+        static::assertEquals('lorem', $this->simpleCollection->getFirst());
+        static::assertEquals('sit', $this->simpleCollection->getLast());
+        static::assertEquals('dolor', $this->simpleCollection[123]);
+    }
+
+    public function testCount()
+    {
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertEquals(4, $this->simpleCollection->count());
+    }
+
+    public function testOffsetExists()
+    {
+        static::assertFalse(isset($this->emptyCollection['abc']));
+        static::assertFalse(isset($this->simpleCollection['abc']));
+
+        static::assertTrue(isset($this->simpleCollection[0]));
+        static::assertTrue(isset($this->simpleCollection[345]));
+    }
+
+    public function testOffsetGet()
+    {
+        static::assertNull($this->emptyCollection['abc']);
+        static::assertNull($this->simpleCollection['abc']);
+
+        static::assertEquals('lorem', $this->simpleCollection[0]);
+        static::assertEquals('sit', $this->simpleCollection[345]);
+    }
+
+    public function testOffsetSet()
+    {
+        $this->emptyCollection['test1'] = 1234;
+        $this->simpleCollection['test2'] = 5678;
+
+        static::assertTrue($this->emptyCollection->has(1234));
+        static::assertEquals(1234, $this->emptyCollection['test1']);
+
+        static::assertTrue($this->simpleCollection->has(5678));
+        static::assertEquals(5678, $this->simpleCollection['test2']);
+    }
+
+    public function testOffsetUnset()
+    {
+        unset($this->simpleCollection[0]);
+
+        static::assertFalse($this->simpleCollection->has('lorem'));
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+        static::assertEquals(3, $this->simpleCollection->count());
+
+        unset($this->simpleCollection[123]);
+
+        static::assertFalse($this->simpleCollection->has('dolor'));
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+        static::assertEquals(2, $this->simpleCollection->count());
+    }
+
+    public function testGetIterator()
+    {
+        static::assertInstanceOf(ArrayIterator::class, $this->simpleCollection->getIterator());
+    }
+
+    public function testAdd()
+    {
+        $this->emptyCollection->add('test1');
+
+        static::assertTrue($this->emptyCollection->has('test1'));
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('test1', $this->emptyCollection[0]);
+    }
+
+    public function testAddWithIndex()
+    {
+        $this->emptyCollection->add('test2', 1234);
+
+        static::assertTrue($this->emptyCollection->has('test2'));
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('test2', $this->emptyCollection[1234]);
+    }
+
+    public function testAddMultipleUsingEmptyArray()
+    {
+        $this->emptyCollection->addMultiple([]);
+
+        static::assertEquals(0, $this->emptyCollection->count());
+        static::assertTrue($this->emptyCollection->isEmpty());
+    }
+
+    public function testAddMultiple()
+    {
+        $elements = [
+            'test1',
+            'test2',
+            1234 => 'test3',
+            5678 => 'test4',
+        ];
+
+        $this->emptyCollection->addMultiple($elements);
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(4, $this->emptyCollection->count());
+
+        static::assertEquals('test1', $this->emptyCollection[0]);
+        static::assertEquals('test2', $this->emptyCollection[1]);
+        static::assertEquals('test3', $this->emptyCollection[2]);
+        static::assertEquals('test4', $this->emptyCollection[3]);
+    }
+
+    public function testAddMultipleUsingIndexes()
+    {
+        $elements = [
+            'test1',
+            'test2',
+            1234 => 'test3',
+            5678 => 'test4',
+        ];
+
+        $this->emptyCollection->addMultiple($elements, true);
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(4, $this->emptyCollection->count());
+
+        static::assertEquals('test1', $this->emptyCollection[0]);
+        static::assertEquals('test2', $this->emptyCollection[1]);
+        static::assertEquals('test3', $this->emptyCollection[1234]);
+        static::assertEquals('test4', $this->emptyCollection[5678]);
+    }
+
+    public function testPrepend()
+    {
+        $this->emptyCollection->prepend('lorem-ipsum');
+
+        static::assertFalse($this->emptyCollection->isEmpty());
+        static::assertEquals(1, $this->emptyCollection->count());
+        static::assertEquals('lorem-ipsum', $this->emptyCollection[0]);
+
+        $this->simpleCollection->prepend('lorem-ipsum');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(5, $this->simpleCollection->count());
+        static::assertEquals('lorem-ipsum', $this->simpleCollection[0]);
+    }
+
+    public function testRemoveNotExistingElement()
+    {
+        $this->emptyCollection->remove('abc');
+
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertEquals(0, $this->emptyCollection->count());
+
+        $this->simpleCollection->remove('abc');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(4, $this->simpleCollection->count());
+    }
+
+    public function testRemove()
+    {
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(4, $this->simpleCollection->count());
+        static::assertEquals('ipsum', $this->simpleCollection[1]);
+
+        $this->simpleCollection->remove('ipsum');
+
+        static::assertFalse($this->simpleCollection->isEmpty());
+        static::assertEquals(3, $this->simpleCollection->count());
+        static::assertNull($this->simpleCollection[1]);
+    }
+
+    public function testIsEmpty()
+    {
+        static::assertTrue($this->emptyCollection->isEmpty());
+        static::assertFalse($this->simpleCollection->isEmpty());
+    }
+
+    public function testIsFirst()
+    {
+        static::assertFalse($this->emptyCollection->isFirst('abc'));
+        static::assertFalse($this->simpleCollection->isFirst('abc'));
+        static::assertFalse($this->simpleCollection->isFirst('dolor'));
+        static::assertTrue($this->simpleCollection->isFirst('lorem'));
+    }
+
+    public function testIsLast()
+    {
+        static::assertFalse($this->emptyCollection->isLast('abc'));
+        static::assertFalse($this->simpleCollection->isLast('abc'));
+        static::assertFalse($this->simpleCollection->isLast('dolor'));
+        static::assertTrue($this->simpleCollection->isLast('sit'));
+    }
+
+    public function testHas()
+    {
+        static::assertFalse($this->emptyCollection->has('abc'));
+        static::assertFalse($this->simpleCollection->has('abc'));
+        static::assertTrue($this->simpleCollection->has('lorem'));
+        static::assertTrue($this->simpleCollection->has('dolor'));
+    }
+
+    public function testGetPrevious()
+    {
+        static::assertNull($this->emptyCollection->getPrevious('abc'));
+        static::assertNull($this->simpleCollection->getPrevious('abc'));
+        static::assertNull($this->simpleCollection->getPrevious('lorem'));
+
+        static::assertEquals('lorem', $this->simpleCollection->getPrevious('ipsum'));
+        static::assertEquals('dolor', $this->simpleCollection->getPrevious('sit'));
+    }
+
+    public function testGetNext()
+    {
+        static::assertNull($this->emptyCollection->getNext('abc'));
+        static::assertNull($this->simpleCollection->getNext('abc'));
+        static::assertNull($this->simpleCollection->getNext('sit'));
+
+        static::assertEquals('dolor', $this->simpleCollection->getNext('ipsum'));
+        static::assertEquals('sit', $this->simpleCollection->getNext('dolor'));
+    }
+
+    public function testGetFirst()
+    {
+        static::assertNull($this->emptyCollection->getFirst());
+        static::assertEquals('lorem', $this->simpleCollection->getFirst());
+    }
+
+    public function testGetLast()
+    {
+        static::assertNull($this->emptyCollection->getLast());
+        static::assertEquals('sit', $this->simpleCollection->getLast());
+    }
+
+    public function testToArray()
+    {
+        static::assertEquals([], $this->emptyCollection->toArray());
+        static::assertEquals($this->simpleElements, $this->simpleCollection->toArray());
+    }
+
+    public function testExistsVisibilityAndArguments()
+    {
+        $reflection = new ReflectionClass(Collection::class);
+        $method = $reflection->getMethod('exists');
+
+        self::assertTrue($method->isPrivate());
+        self::assertEquals(1, $method->getNumberOfParameters());
+        self::assertEquals(1, $method->getNumberOfRequiredParameters());
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->simpleElements = [
+            'lorem',
+            'ipsum',
+            123 => 'dolor',
+            345 => 'sit',
+        ];
+
+        $this->emptyCollection = new Collection();
+        $this->simpleCollection = new Collection($this->simpleElements);
+    }
+}

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

@@ -1,11 +1,18 @@
 <?php
 
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Meritoo\Common\Tests\Utilities;
 
 use DateTime;
 use Generator;
 use Meritoo\Common\Utilities\DatePeriod;
 use Meritoo\Common\Utilities\TestCase;
+use ReflectionClass;
 
 /**
  * Tests of date's period
@@ -15,6 +22,16 @@ use Meritoo\Common\Utilities\TestCase;
  */
 class DatePeriodTest extends TestCase
 {
+    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());
+    }
+
     /**
      * @param DateTime $startDate (optional) Start date of period
      * @param DateTime $endDate   (optional) End date of period

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

@@ -9,8 +9,8 @@
 namespace Meritoo\Common\Tests\Utilities;
 
 use Generator;
-use Meritoo\Common\Exception\IncorrectColorHexLengthException;
+use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
-use Meritoo\Common\Exception\InvalidColorHexValueException;
+use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
 use Meritoo\Common\Utilities\Locale;
 use Meritoo\Common\Utilities\Miscellaneous;
 use Meritoo\Common\Utilities\TestCase;

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

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

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

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

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

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

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

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

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

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

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

@@ -1,4 +1,5 @@
 <?php
+
 /**
  * (c) Meritoo.pl, http://www.meritoo.pl
  * For the full copyright and license information, please view the LICENSE