Merge branch 'master' of github.com:meritoo/common-library

# Conflicts:
#	README.md

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 Common and useful classes, methods, exceptions etc.
 
+# 0.1.3
+
+1. Tests > refactoring & minor improvements
+2. Utilities > CssSelector > useful methods related to CSS selectors
+3. Utilities > Bootstrap4CssSelector > useful methods related to CSS selectors and the Bootstrap4 (front-end component library)
+
 # 0.1.2
 
 1. Documentation > Value Objects

README.md

@@ -6,10 +6,22 @@ Common and useful classes, methods, exceptions etc.
 
 # Installation
 
+In your `composer.json` add address of repository into `repositories` section:
+
+```json
+"repositories": [
+    (...)
+    {
+        "type": "vcs",
+        "url": "https://github.com/wiosna-dev/common-library"
+    }
+]
+```
+
 Run [Composer](https://getcomposer.org) to install this package in your project:
 
 ```bash
-composer require meritoo/common-library
+composer require wiosna-dev/common-library
 ```
 
 > [How to install Composer?](https://getcomposer.org/download)

VERSION

@@ -1 +1 @@
-0.1.2
+0.1.3

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "meritoo/common-library",
+    "name": "wiosna-dev/common-library",
     "description": "Useful classes, methods, extensions etc.",
     "license": "MIT",
     "authors": [
@@ -11,6 +11,7 @@
     ],
     "require": {
         "php": ">=5.6",
+        "ext-intl": "*",
         "ext-pcre": "*",
         "doctrine/orm": "^2.5",
         "gedmo/doctrine-extensions": "^2.4"

src/Traits/CssSelector/FormCssSelector.php

@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Traits\CssSelector;
+
+/**
+ * Useful methods related to CSS selectors of form
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+trait FormCssSelector
+{
+    /**
+     * Returns selector of form based on its name
+     *
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @return string
+     */
+    public static function getFormByNameSelector($formName)
+    {
+        $formName = trim($formName);
+
+        if (empty($formName)) {
+            return '';
+        }
+
+        return sprintf('form[name="%s"]', $formName);
+    }
+
+    /**
+     * Returns selector of the input field based on its name
+     *
+     * @param string $formName  Name of form (value of the "name" attribute)
+     * @param string $fieldName Name of field (value of the "name" attribute)
+     * @return string
+     */
+    public static function getInputByNameSelector($formName, $fieldName)
+    {
+        $formSelector = static::getFormByNameSelector($formName);
+        $fieldName = trim($fieldName);
+
+        if (empty($formSelector) || empty($fieldName)) {
+            return '';
+        }
+
+        return sprintf('%s input[name="%s"]', $formSelector, $fieldName);
+    }
+
+    /**
+     * Returns selector of the input field based on its ID
+     *
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $fieldId  ID of field (value of the "id" attribute)
+     * @return string
+     */
+    public static function getInputByIdSelector($formName, $fieldId)
+    {
+        $formSelector = static::getFormByNameSelector($formName);
+        $fieldId = trim($fieldId);
+
+        if (empty($formSelector) || empty($fieldId)) {
+            return '';
+        }
+
+        return sprintf('%s input#%s', $formSelector, $fieldId);
+    }
+
+    /**
+     * Returns selector of label
+     *
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $fieldId  ID of field (value of the "id" attribute)
+     * @return string
+     */
+    public static function getLabelSelector($formName, $fieldId)
+    {
+        $formSelector = static::getFormByNameSelector($formName);
+        $fieldId = trim($fieldId);
+
+        if (empty($formSelector) || empty($fieldId)) {
+            return '';
+        }
+
+        return sprintf('%s label[for="%s"]', $formSelector, $fieldId);
+    }
+
+    /**
+     * Returns selector of field-set using index/position of the field-set
+     *
+     * @param string $formName      Name of form (value of the "name" attribute)
+     * @param int    $fieldSetIndex Index/Position of the field-set
+     * @return string
+     */
+    public static function getFieldSetByIndexSelector($formName, $fieldSetIndex)
+    {
+        $formSelector = static::getFormByNameSelector($formName);
+
+        if (empty($formSelector) || 0 > $fieldSetIndex) {
+            return '';
+        }
+
+        return sprintf('%s fieldset:nth-of-type(%d)', $formSelector, $fieldSetIndex);
+    }
+}

src/Traits/Test/Base/BaseTestCaseTrait.php

@@ -49,6 +49,20 @@ trait BaseTestCaseTrait
         yield[[]];
     }
 
+    /**
+     * Provides an empty scalar value
+     *
+     * @return Generator
+     */
+    public function provideEmptyScalarValue()
+    {
+        yield[''];
+        yield['   '];
+        yield[null];
+        yield[0];
+        yield[false];
+    }
+
     /**
      * Provides boolean value
      *

src/Utilities/Bootstrap4CssSelector.php

@@ -0,0 +1,85 @@
+<?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;
+
+/**
+ * Useful methods related to CSS selectors and the Bootstrap4 (front-end component library)
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class Bootstrap4CssSelector
+{
+    /**
+     * Returns selector of container with field's validation error
+     *
+     * @return string
+     */
+    public static function getFieldErrorContainerSelector()
+    {
+        return '.invalid-feedback .form-error-message';
+    }
+
+    /**
+     * Returns selector of field's validation error
+     *
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $fieldId  ID of field (value of the "id" attribute)
+     * @return string
+     */
+    public static function getFieldErrorSelector($formName, $fieldId)
+    {
+        $labelSelector = CssSelector::getLabelSelector($formName, $fieldId);
+
+        if (empty($labelSelector)) {
+            return '';
+        }
+
+        $errorContainerSelector = static::getFieldErrorContainerSelector();
+
+        return sprintf('%s %s', $labelSelector, $errorContainerSelector);
+    }
+
+    /**
+     * Returns selector of radio-button's validation error
+     *
+     * @param string $formName      Name of form (value of the "name" attribute)
+     * @param int    $fieldSetIndex Index/Position of the field-set
+     * @return string
+     */
+    public static function getRadioButtonErrorSelector($formName, $fieldSetIndex)
+    {
+        $fieldSetSelector = CssSelector::getFieldSetByIndexSelector($formName, $fieldSetIndex);
+
+        if (empty($fieldSetSelector)) {
+            return '';
+        }
+
+        $errorContainerSelector = static::getFieldErrorContainerSelector();
+
+        return sprintf('%s legend.col-form-label %s', $fieldSetSelector, $errorContainerSelector);
+    }
+
+    /**
+     * Returns selector of field's group
+     *
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @return string
+     */
+    public static function getFieldGroupSelector($formName)
+    {
+        $formSelector = CssSelector::getFormByNameSelector($formName);
+
+        if (empty($formSelector)) {
+            return '';
+        }
+
+        return sprintf('%s .form-group', $formSelector);
+    }
+}

src/Utilities/CssSelector.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\Utilities;
+
+use Meritoo\Common\Traits\CssSelector\FormCssSelector;
+
+/**
+ * Useful methods related to CSS selectors
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class CssSelector
+{
+    use FormCssSelector;
+}

src/Utilities/Date.php

@@ -119,11 +119,15 @@ class Date
                 $lastMonth = self::getDatesForPeriod(DatePeriod::LAST_MONTH);
                 $nextMonth = self::getDatesForPeriod(DatePeriod::NEXT_MONTH);
 
-                $dateStart = $lastMonth->getEndDate();
-                $dateStart->add(new DateInterval('P1D'));
+                if (null !== $lastMonth) {
+                    $dateStart = $lastMonth->getEndDate();
+                    $dateStart->add(new DateInterval('P1D'));
+                }
 
-                $dateEnd = $nextMonth->getStartDate();
-                $dateEnd->sub(new DateInterval('P1D'));
+                if (null !== $nextMonth) {
+                    $dateEnd = $nextMonth->getStartDate();
+                    $dateEnd->sub(new DateInterval('P1D'));
+                }
 
                 break;
             case DatePeriod::NEXT_MONTH:
@@ -137,10 +141,10 @@ class Date
                 $dateStart = new DateTime();
                 $dateEnd = new DateTime();
 
-                if (DatePeriod::LAST_YEAR == $period || DatePeriod::NEXT_YEAR == $period) {
+                if (DatePeriod::LAST_YEAR === $period || DatePeriod::NEXT_YEAR === $period) {
                     $yearDifference = 1;
 
-                    if (DatePeriod::LAST_YEAR == $period) {
+                    if (DatePeriod::LAST_YEAR === $period) {
                         $yearDifference *= -1;
                     }
 
@@ -220,7 +224,6 @@ class Date
     /**
      * Returns current day of week
      *
-     * @throws UnknownDatePartTypeException
      * @return int
      */
     public static function getCurrentDayOfWeek()
@@ -368,11 +371,11 @@ class Date
             return null;
         }
 
-        $dateStart = self::getDateTime($dateStart, true);
-        $dateEnd = self::getDateTime($dateEnd, true);
+        $start = self::getDateTime($dateStart, true);
+        $end = self::getDateTime($dateEnd, true);
 
         $difference = [];
-        $dateDiff = $dateEnd->getTimestamp() - $dateStart->getTimestamp();
+        $dateDiff = $end->getTimestamp() - $start->getTimestamp();
 
         $daysInSeconds = 0;
         $hoursInSeconds = 0;
@@ -390,39 +393,39 @@ class Date
             self::DATE_DIFFERENCE_UNIT_MINUTES,
         ];
 
-        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_YEARS == $differenceUnit) {
-            $diff = $dateEnd->diff($dateStart);
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_YEARS === $differenceUnit) {
+            $diff = $end->diff($start);
 
             /*
              * Difference between dates in years should be returned only?
              */
-            if (self::DATE_DIFFERENCE_UNIT_YEARS == $differenceUnit) {
+            if (self::DATE_DIFFERENCE_UNIT_YEARS === $differenceUnit) {
                 return $diff->y;
             }
 
             $difference[self::DATE_DIFFERENCE_UNIT_YEARS] = $diff->y;
         }
 
-        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MONTHS == $differenceUnit) {
-            $diff = $dateEnd->diff($dateStart);
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MONTHS === $differenceUnit) {
+            $diff = $end->diff($start);
 
             /*
              * Difference between dates in months should be returned only?
              */
-            if (self::DATE_DIFFERENCE_UNIT_MONTHS == $differenceUnit) {
+            if (self::DATE_DIFFERENCE_UNIT_MONTHS === $differenceUnit) {
                 return $diff->m;
             }
 
             $difference[self::DATE_DIFFERENCE_UNIT_MONTHS] = $diff->m;
         }
 
-        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits)) {
+        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits, true)) {
             $days = (int)floor($dateDiff / $daySeconds);
 
             /*
              * Difference between dates in days should be returned only?
              */
-            if (self::DATE_DIFFERENCE_UNIT_DAYS == $differenceUnit) {
+            if (self::DATE_DIFFERENCE_UNIT_DAYS === $differenceUnit) {
                 return $days;
             }
 
@@ -439,13 +442,13 @@ class Date
             $daysInSeconds = $days * $daySeconds;
         }
 
-        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits)) {
+        if (null === $differenceUnit || in_array($differenceUnit, $relatedUnits, true)) {
             $hours = (int)floor(($dateDiff - $daysInSeconds) / $hourSeconds);
 
             /*
              * Difference between dates in hours should be returned only?
              */
-            if (self::DATE_DIFFERENCE_UNIT_HOURS == $differenceUnit) {
+            if (self::DATE_DIFFERENCE_UNIT_HOURS === $differenceUnit) {
                 return $hours;
             }
 
@@ -462,13 +465,13 @@ class Date
             $hoursInSeconds = $hours * $hourSeconds;
         }
 
-        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MINUTES == $differenceUnit) {
+        if (null === $differenceUnit || self::DATE_DIFFERENCE_UNIT_MINUTES === $differenceUnit) {
             $minutes = (int)floor(($dateDiff - $daysInSeconds - $hoursInSeconds) / 60);
 
             /*
              * Difference between dates in minutes should be returned only?
              */
-            if (self::DATE_DIFFERENCE_UNIT_MINUTES == $differenceUnit) {
+            if (self::DATE_DIFFERENCE_UNIT_MINUTES === $differenceUnit) {
                 return $minutes;
             }
 
@@ -554,7 +557,7 @@ class Date
         }
 
         $randomDate = clone $startDate;
-        $randomInterval = new DateInterval(sprintf($intervalTemplate, rand($start, $end)));
+        $randomInterval = new DateInterval(sprintf($intervalTemplate, mt_rand($start, $end)));
 
         return $randomDate->add($randomInterval);
     }
@@ -637,7 +640,7 @@ class Date
                          * So, I have to refuse those special compound formats if they are not explicitly declared as
                          * compound (2nd argument of this method, set to false by default)
                          */
-                        if (in_array($value, $specialFormats)) {
+                        if (in_array($value, $specialFormats, true)) {
                             return false;
                         }
                     }
@@ -662,7 +665,7 @@ class Date
              */
             $dateString = (new DateTime())->format($value);
 
-            if ($dateString != $value) {
+            if ($dateString !== (string)$value) {
                 return new DateTime($dateString);
             }
         } catch (\Exception $exception) {
@@ -706,7 +709,7 @@ class Date
          * Formatted date it's the format who is validated?
          * The format is invalid
          */
-        if ($formatted == $format) {
+        if ($formatted === $format) {
             return false;
         }
 

src/Utilities/Miscellaneous.php

@@ -9,8 +9,6 @@
 namespace Meritoo\Common\Utilities;
 
 use Gedmo\Sluggable\Util\Urlizer;
-use Meritoo\Common\Exception\Regex\IncorrectColorHexLengthException;
-use Meritoo\Common\Exception\Regex\InvalidColorHexValueException;
 use Transliterator;
 
 /**
@@ -62,15 +60,15 @@ class Miscellaneous
             $startFileName = mb_substr($startFileName, 1);
         }
 
-        $directoryContent = scandir($directoryPath);
+        $directoryContent = scandir($directoryPath, SCANDIR_SORT_ASCENDING);
 
         if (!empty($directoryContent)) {
             foreach ($directoryContent as $fileName) {
-                if ('.' != $fileName && '..' != $fileName) {
+                if ('.' !== $fileName && '..' !== $fileName) {
                     $content = null;
 
                     if (!empty($startFileName) && !$startFileFound) {
-                        if ($fileName == $startFileName) {
+                        if ($fileName === $startFileName) {
                             $startFileFound = true;
                         }
 
@@ -84,18 +82,18 @@ class Miscellaneous
                     if (null !== $content) {
                         $files[$fileName] = $content;
 
-                        if (!empty($maxFilesCount)) {
+                        if (null !== $maxFilesCount) {
                             $count += Arrays::getNonArrayElementsCount($content);
                         }
                     } else {
                         $files[] = $fileName;
 
-                        if (!empty($maxFilesCount)) {
+                        if (null !== $maxFilesCount) {
                             ++$count;
                         }
                     }
 
-                    if (!empty($maxFilesCount) && $count >= $maxFilesCount) {
+                    if (null !== $maxFilesCount && $count >= $maxFilesCount) {
                         break;
                     }
                 }
@@ -160,11 +158,17 @@ class Miscellaneous
      */
     public static function includeFileExtension($fileName, $extension)
     {
-        if (self::getFileExtension($fileName, true) != strtolower($extension)) {
-            return sprintf('%s.%s', $fileName, $extension);
+        $fileExtension = self::getFileExtension($fileName, true);
+
+        /*
+         * File has given extension?
+         * Nothing to do
+         */
+        if ($fileExtension === strtolower($extension)) {
+            return $fileName;
         }
 
-        return $fileName;
+        return sprintf('%s.%s', $fileName, $extension);
     }
 
     /**
@@ -229,31 +233,28 @@ class Miscellaneous
         /*
          * Let's clear name of file
          *
-         * Attention. The name without extension may be cleared / urlized only
-         * to avoid incorrect name by replacing "." with "-".
+         * Attention.
+         * The name without extension may be cleared / urlized only to avoid incorrect name by replacing "." with "-".
          */
         $withoutExtension = Urlizer::urlize($withoutExtension);
 
         /*
          * Now I have to complete the template used to build / generate unique name
          */
-        $template = '%s-%s'; // file's name and unique key
-
-        if ($objectId > 0) {
-            $template .= '-%s'; // object ID
-        }
-
-        $template .= '.%s'; // file's extension
+        $template = '%s-%s.%s'; // [file's name]-[unique key].[file's extension]
 
         /*
          * Add some uniqueness
          */
-        $unique = uniqid(mt_rand(), true);
+        $unique = self::getUniqueString(mt_rand());
 
         /*
          * Finally build and return the unique name
          */
+
         if ($objectId > 0) {
+            $template = '%s-%s-%s.%s'; // [file's name]-[unique key]-[object ID].[file's extension]
+
             return sprintf($template, $withoutExtension, $unique, $objectId, $extension);
         }
 
@@ -333,7 +334,7 @@ class Miscellaneous
     {
         $phpModulesArray = get_loaded_extensions();
 
-        return in_array($phpModuleName, $phpModulesArray);
+        return in_array($phpModuleName, $phpModulesArray, false);
     }
 
     /**
@@ -461,7 +462,7 @@ class Miscellaneous
          * Value to find is neither a string nor an array OR it's an empty string?
          * Nothing to do
          */
-        if ((!$searchIsString && !$searchIsArray) || ($searchIsString && 0 == strlen($search))) {
+        if ((!$searchIsString && !$searchIsArray) || ($searchIsString && '' === $search)) {
             return $effect;
         }
 
@@ -486,7 +487,7 @@ class Miscellaneous
          * Second step: replace with regular expressions.
          * Attention. Searched and replacement value should be the same type: strings or arrays.
          */
-        if ($effect == $subject && ($bothAreStrings || $bothAreArrays)) {
+        if ($effect === $subject && ($bothAreStrings || $bothAreArrays)) {
             if ($quoteStrings && $replacementIsString) {
                 $replacement = '\'' . $replacement . '\'';
             }
@@ -504,7 +505,7 @@ class Miscellaneous
          * Third step: complex replace of the replacement defined as an array.
          * It may be useful when you want to search for a one string and replace the string with multiple values.
          */
-        if ($effect == $subject && $searchIsString && $replacementIsArray) {
+        if ($effect === $subject && $searchIsString && $replacementIsArray) {
             $subjectIsArray = is_array($subject);
             $effect = '';
 
@@ -589,7 +590,12 @@ class Miscellaneous
      */
     public static function getOperatingSystemNameServer()
     {
-        return php_uname('s');
+        return PHP_OS;
+
+        /*
+         * Previous version:
+         * return php_uname('s');
+         */
     }
 
     /**
@@ -681,7 +687,8 @@ class Miscellaneous
 
                     $spacePosition = mb_strrpos($lineWithAberration, ' ', 0, $encoding);
 
-                    if ($spacePosition > 0) {
+                    if (false !== $spacePosition && 0 < $spacePosition) {
+                        /* @var int $spacePosition */
                         $perLine = $spacePosition;
                         $insertSeparator = true;
                     }
@@ -738,8 +745,8 @@ class Miscellaneous
             return unlink($directoryPath);
         }
 
-        foreach (scandir($directoryPath) as $item) {
-            if ('.' == $item || '..' == $item) {
+        foreach (scandir($directoryPath, SCANDIR_SORT_ASCENDING) as $item) {
+            if ('.' === $item || '..' === $item) {
                 continue;
             }
 
@@ -788,7 +795,7 @@ class Miscellaneous
         foreach ($members as $key => $value) {
             $value = mb_strtolower($value);
 
-            if (0 == $key) {
+            if (0 === $key) {
                 $effect .= self::lowercaseFirst($value);
             } else {
                 $effect .= self::uppercaseFirst($value);
@@ -809,10 +816,6 @@ class Miscellaneous
      * - null (default): nothing is done with the string
      * - true: the rest of string is lowercased
      * - false: the rest of string is uppercased
-     *
-     * Some explanation:
-     * Function lcfirst() is available for PHP >= 5.30, so I wrote my own function that lowercases first character of
-     * the string.
      */
     public static function lowercaseFirst($text, $restLowercase = null)
     {
@@ -828,16 +831,7 @@ class Miscellaneous
             $effect = mb_strtoupper($effect);
         }
 
-        if (function_exists('lcfirst')) {
-            $effect = lcfirst($effect);
-        } else {
-            $first = mb_strtolower($effect[0]);
-            $rest = mb_substr($effect, 1);
-
-            $effect = $first . $rest;
-        }
-
-        return $effect;
+        return lcfirst($effect);
     }
 
     /**
@@ -866,16 +860,7 @@ class Miscellaneous
             $effect = mb_strtoupper($effect);
         }
 
-        if (function_exists('ucfirst')) {
-            $effect = ucfirst($effect);
-        } else {
-            $first = mb_strtoupper($effect[0]);
-            $rest = mb_substr($effect, 1);
-
-            $effect = $first . $rest;
-        }
-
-        return $effect;
+        return ucfirst($effect);
     }
 
     /**
@@ -916,9 +901,9 @@ class Miscellaneous
             'TB',
             'PB',
         ];
-        $index = floor(log($sizeInBytes, 1024));
 
-        $size = round($sizeInBytes / pow(1024, $index), 2);
+        $index = floor(log($sizeInBytes, 1024));
+        $size = round($sizeInBytes / (1024 ** $index), 2);
         $unit = $units[(int)$index];
 
         return sprintf('%s %s', $size, $unit);
@@ -1194,10 +1179,6 @@ class Miscellaneous
 
             if (null !== $globalSource && isset($globalSource[$variableName])) {
                 $value = $globalSource[$variableName];
-
-                if (!ini_get('magic_quotes_gpc')) {
-                    $value = addslashes($value);
-                }
             }
         }
 
@@ -1243,7 +1224,7 @@ class Miscellaneous
                 continue;
             }
 
-            $text = $text . '0';
+            $text .= '0';
         }
 
         return $text;
@@ -1298,8 +1279,8 @@ class Miscellaneous
         if ($asHexadecimal) {
             $hexadecimal = dechex($colorComponent);
 
-            if (1 == strlen($hexadecimal)) {
-                return sprintf('0%s', $hexadecimal, $hexadecimal);
+            if (1 === strlen($hexadecimal)) {
+                return sprintf('0%s', $hexadecimal);
             }
 
             return $hexadecimal;
@@ -1312,8 +1293,6 @@ class Miscellaneous
      * Returns inverted value of color for given color
      *
      * @param string $color Hexadecimal value of color to invert (with or without hash), e.g. "dd244c" or "#22a5fe"
-     * @throws IncorrectColorHexLengthException
-     * @throws InvalidColorHexValueException
      * @return string
      */
     public static function getInvertedColor($color)
@@ -1328,14 +1307,14 @@ class Miscellaneous
          * Verify and get valid value of color.
          * An exception will be thrown if the value is not a color.
          */
-        $color = Regex::getValidColorHexValue($color);
+        $validColor = Regex::getValidColorHexValue($color);
 
         /*
          * Grab color's components
          */
-        $red = hexdec(substr($color, 0, 2));
-        $green = hexdec(substr($color, 2, 2));
-        $blue = hexdec(substr($color, 4, 2));
+        $red = hexdec(substr($validColor, 0, 2));
+        $green = hexdec(substr($validColor, 2, 2));
+        $blue = hexdec(substr($validColor, 4, 2));
 
         /*
          * Calculate inverted color's components

tests/Utilities/ArraysTest.php

@@ -517,7 +517,12 @@ letsTest[2] = value_2;';
         self::assertTrue(Arrays::areKeysInArray($keys17, $this->complexArray, false));
     }
 
-    public function testGetLastElementsPaths()
+    public function testGetLastElementsPathsUsingEmptyArray()
+    {
+        self::assertSame([], Arrays::getLastElementsPaths([]));
+    }
+
+    public function testGetLastElementsPathsUsingDefaults()
     {
         /*
          * Using default separator and other default arguments
@@ -536,7 +541,10 @@ letsTest[2] = value_2;';
         ];
 
         self::assertEquals($expected, Arrays::getLastElementsPaths($this->complexArray));
+    }
 
+    public function testGetLastElementsPathsUsingCustomSeparator()
+    {
         /*
          * Using custom separator
          */
@@ -555,204 +563,20 @@ letsTest[2] = value_2;';
         ];
 
         self::assertEquals($expected, Arrays::getLastElementsPaths($this->complexArray, $separator));
+    }
 
-        /*
-         * Special exception: do not use, stop recursive on the "diam" key
-         */
-        $expected = [
-            'lorem.ipsum.dolor'        => 'sit',
-            'consectetur'              => 'adipiscing',
-            'mollis'                   => 1234,
-            2                          => [],
-            'sit.nullam'               => 'donec',
-            'sit.aliquet.vitae.ligula' => 'quis',
-            'sit.0'                    => 'elit',
-            'amet.0'                   => 'iaculis',
-            'amet.1'                   => 'primis',
-            'lorem.ipsum.diam'         => [
-                'non' => 'egestas',
-            ],
-        ];
-
-        $stopIfMatchedBy = 'diam';
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->complexArray, '.', '', $stopIfMatchedBy));
-
-        /*
-         * Stop building of paths on these keys:
-         * - "diam"
-         * - "aliquet"
-         */
-        $expected = [
-            'lorem . ipsum . dolor' => 'sit',
-            'consectetur'           => 'adipiscing',
-            'mollis'                => 1234,
-            2                       => [],
-            'sit . nullam'          => 'donec',
-            'sit . 0'               => 'elit',
-            'amet . 0'              => 'iaculis',
-            'amet . 1'              => 'primis',
-            'lorem . ipsum . diam'  => [
-                'non' => 'egestas',
-            ],
-            'sit . aliquet'         => [
-                'vitae' => [
-                    'ligula' => 'quis',
-                ],
-            ],
-        ];
-
-        $stopIfMatchedBy = [
-            'diam',
-            'aliquet',
-        ];
-
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->complexArray, ' . ', '', $stopIfMatchedBy));
-
-        $expected = [
-            'ipsum > quis > vestibulum > porta-1' => [
-                'turpis',
-                'urna',
-            ],
-            'ipsum > quis > vestibulum > porta-2' => [
-                'tortor' => [
-                    'in' => [
-                        'dui',
-                        'dolor' => [
-                            'aliquam',
-                        ],
-                    ],
-                ],
-            ],
-            'ipsum > quis > vestibulum > porta-3' => [
-                1,
-                2,
-                3,
-            ],
-            'primis > 0'                          => [
-                'in',
-                'faucibus',
-                'orci',
-            ],
-            'primis > 1'                          => [
-                'luctus',
-                'et',
-                'ultrices',
-            ],
-        ];
-
-        /*
-         * Stop building of paths on more sophisticated keys
-         */
-        $stopIfMatchedBy = [
-            'porta\-\d+',
-            '^\d+$',
-        ];
-
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->superComplexArray, ' > ', '', $stopIfMatchedBy));
-
-        /*
-         * Stop building of paths on these:
-         * - keys
-         * and
-         * - paths (verify paths too)
-         */
-        $expected = [
-            'lorem > ipsum > dolor' => 'sit',
-            'consectetur'           => 'adipiscing',
-            'mollis'                => 1234,
-            2                       => [],
-            'sit > nullam'          => 'donec',
-            'sit > 0'               => 'elit',
-            'amet > 0'              => 'iaculis',
-            'amet > 1'              => 'primis',
-            'lorem > ipsum > diam'  => [
-                'non' => 'egestas',
-            ],
-            'sit > aliquet > vitae' => [
-                'ligula' => 'quis',
-            ],
-        ];
-
-        $stopIfMatchedBy = [
-            'diam',
-            'sit > aliquet > vitae',
-        ];
-
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->complexArray, ' > ', '', $stopIfMatchedBy));
-
-        /*
-         * Stop building of paths on these paths (verify paths only)
-         */
-        $expected = [
-            'ipsum > quis > vestibulum > porta-1'          => [
-                'turpis',
-                'urna',
-            ],
-            'ipsum > quis > vestibulum > porta-2 > tortor' => [
-                'in' => [
-                    'dui',
-                    'dolor' => [
-                        'aliquam',
-                    ],
-                ],
-            ],
-            'ipsum > quis > vestibulum > porta-3 > 0'      => 1,
-            'ipsum > quis > vestibulum > porta-3 > 1'      => 2,
-            'ipsum > quis > vestibulum > porta-3 > 2'      => 3,
-            'primis > 0 > 0'                               => 'in',
-            'primis > 0 > 1'                               => 'faucibus',
-            'primis > 0 > 2'                               => 'orci',
-            'primis > 1'                                   => [
-                'luctus',
-                'et',
-                'ultrices',
-            ],
-        ];
-
-        $stopIfMatchedBy = [
-            'ipsum > quis > vestibulum > porta-1',
-            'ipsum > quis > vestibulum > porta-2 > tortor',
-            'primis > 1',
-        ];
-
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->superComplexArray, ' > ', '', $stopIfMatchedBy));
-
-        /*
-         * Stop building of paths if path contains any of these part (verify part of paths only)
-         */
-        $expected = [
-            'ipsum > quis > vestibulum > porta-1'               => [
-                'turpis',
-                'urna',
-            ],
-            'ipsum > quis > vestibulum > porta-2 > tortor > in' => [
-                'dui',
-                'dolor' => [
-                    'aliquam',
-                ],
-            ],
-            'ipsum > quis > vestibulum > porta-3 > 0'           => 1,
-            'ipsum > quis > vestibulum > porta-3 > 1'           => 2,
-            'ipsum > quis > vestibulum > porta-3 > 2'           => 3,
-            'primis > 0'                                        => [
-                'in',
-                'faucibus',
-                'orci',
-            ],
-            'primis > 1'                                        => [
-                'luctus',
-                'et',
-                'ultrices',
-            ],
-        ];
-
-        $stopIfMatchedBy = [
-            'vestibulum > porta-1',
-            'tortor > in',
-            '[a-z]+ > \d+',
-        ];
-
-        self::assertEquals($expected, Arrays::getLastElementsPaths($this->superComplexArray, ' > ', '', $stopIfMatchedBy));
+    /**
+     * @param string|array $stopIfMatchedBy Patterns of keys or paths that matched will stop the process of path
+     *                                      building and including children of those keys or paths (recursive will
+     *                                      not be used for keys in lower level of given array)
+     * @param string       $separator       Separator used in resultant strings. Default: ".".
+     * @param array        $expected        Expected array
+     *
+     * @dataProvider provideStopIfMatchedByForGetLastElementsPaths
+     */
+    public function testGetLastElementsPathsUsingStopIfMatchedBy($stopIfMatchedBy, $separator, array $expected)
+    {
+        self::assertEquals($expected, Arrays::getLastElementsPaths($this->superComplexArray, $separator, '', $stopIfMatchedBy));
     }
 
     public function testAreAllKeysMatchedByPattern()
@@ -1760,6 +1584,229 @@ letsTest[2] = value_2;';
         ];
     }
 
+    /**
+     * Provides patterns of keys or paths that matched will stop the process and the expected array for the
+     * getLastElementsPaths() method
+     *
+     * @return \Generator
+     */
+    public function provideStopIfMatchedByForGetLastElementsPaths()
+    {
+        /*
+         * Special exception: do not use, stop recursive on the "diam" key
+         */
+        yield[
+            'diam',
+            '.',
+            [
+                'ipsum.quis.vestibulum.porta-1.0'                 => 'turpis',
+                'ipsum.quis.vestibulum.porta-1.1'                 => 'urna',
+                'ipsum.quis.vestibulum.porta-2.tortor.in.0'       => 'dui',
+                'ipsum.quis.vestibulum.porta-2.tortor.in.dolor.0' => 'aliquam',
+                'ipsum.quis.vestibulum.porta-3.0'                 => 1,
+                'ipsum.quis.vestibulum.porta-3.1'                 => 2,
+                'ipsum.quis.vestibulum.porta-3.2'                 => 3,
+                'primis.0.0'                                      => 'in',
+                'primis.0.1'                                      => 'faucibus',
+                'primis.0.2'                                      => 'orci',
+                'primis.1.0'                                      => 'luctus',
+                'primis.1.1'                                      => 'et',
+                'primis.1.2'                                      => 'ultrices',
+            ],
+        ];
+
+        /*
+         * Stop building of paths on these keys:
+         * - "tortor"
+         * - "primis"
+         */
+        yield[
+            [
+                'tortor',
+                'primis',
+            ],
+            ' . ',
+            [
+                'ipsum . quis . vestibulum . porta-1 . 0'      => 'turpis',
+                'ipsum . quis . vestibulum . porta-1 . 1'      => 'urna',
+                'ipsum . quis . vestibulum . porta-2 . tortor' => [
+                    'in' => [
+                        'dui',
+                        'dolor' => [
+                            'aliquam',
+                        ],
+                    ],
+                ],
+                'ipsum . quis . vestibulum . porta-3 . 0'      => 1,
+                'ipsum . quis . vestibulum . porta-3 . 1'      => 2,
+                'ipsum . quis . vestibulum . porta-3 . 2'      => 3,
+                'primis'                                       => [
+                    [
+                        'in',
+                        'faucibus',
+                        'orci',
+                    ],
+                    [
+                        'luctus',
+                        'et',
+                        'ultrices',
+                    ],
+                ],
+            ],
+        ];
+
+        /*
+         * Stop building of paths on more sophisticated keys
+         */
+        yield[
+            [
+                'porta\-\d+',
+                '^\d+$',
+            ],
+            ' > ',
+            [
+                'ipsum > quis > vestibulum > porta-1' => [
+                    'turpis',
+                    'urna',
+                ],
+                'ipsum > quis > vestibulum > porta-2' => [
+                    'tortor' => [
+                        'in' => [
+                            'dui',
+                            'dolor' => [
+                                'aliquam',
+                            ],
+                        ],
+                    ],
+                ],
+                'ipsum > quis > vestibulum > porta-3' => [
+                    1,
+                    2,
+                    3,
+                ],
+                'primis > 0'                          => [
+                    'in',
+                    'faucibus',
+                    'orci',
+                ],
+                'primis > 1'                          => [
+                    'luctus',
+                    'et',
+                    'ultrices',
+                ],
+            ],
+        ];
+
+        /*
+         * Stop building of paths on these:
+         * - keys
+         * and
+         * - paths (verify paths too)
+         */
+        yield[
+            [
+                'porta-1',
+                'porta-2 > tortor > in',
+            ],
+            ' > ',
+            [
+                'ipsum > quis > vestibulum > porta-1'               => [
+                    'turpis',
+                    'urna',
+                ],
+                'ipsum > quis > vestibulum > porta-2 > tortor > in' => [
+                    'dui',
+                    'dolor' => [
+                        'aliquam',
+                    ],
+                ],
+                'ipsum > quis > vestibulum > porta-3 > 0'           => 1,
+                'ipsum > quis > vestibulum > porta-3 > 1'           => 2,
+                'ipsum > quis > vestibulum > porta-3 > 2'           => 3,
+                'primis > 0 > 0'                                    => 'in',
+                'primis > 0 > 1'                                    => 'faucibus',
+                'primis > 0 > 2'                                    => 'orci',
+                'primis > 1 > 0'                                    => 'luctus',
+                'primis > 1 > 1'                                    => 'et',
+                'primis > 1 > 2'                                    => 'ultrices',
+            ],
+        ];
+
+        /*
+         * Stop building of paths on these paths (verify paths only)
+         */
+        yield[
+            [
+                'ipsum > quis > vestibulum > porta-1',
+                'ipsum > quis > vestibulum > porta-2 > tortor',
+                'primis > 1',
+            ],
+            ' > ',
+            [
+                'ipsum > quis > vestibulum > porta-1'          => [
+                    'turpis',
+                    'urna',
+                ],
+                'ipsum > quis > vestibulum > porta-2 > tortor' => [
+                    'in' => [
+                        'dui',
+                        'dolor' => [
+                            'aliquam',
+                        ],
+                    ],
+                ],
+                'ipsum > quis > vestibulum > porta-3 > 0'      => 1,
+                'ipsum > quis > vestibulum > porta-3 > 1'      => 2,
+                'ipsum > quis > vestibulum > porta-3 > 2'      => 3,
+                'primis > 0 > 0'                               => 'in',
+                'primis > 0 > 1'                               => 'faucibus',
+                'primis > 0 > 2'                               => 'orci',
+                'primis > 1'                                   => [
+                    'luctus',
+                    'et',
+                    'ultrices',
+                ],
+            ],
+        ];
+
+        /*
+         * Stop building of paths if path contains any of these part (verify part of paths only)
+         */
+        yield[
+            [
+                'vestibulum > porta-1',
+                'tortor > in',
+                '[a-z]+ > \d+',
+            ],
+            ' > ',
+            [
+                'ipsum > quis > vestibulum > porta-1'               => [
+                    'turpis',
+                    'urna',
+                ],
+                'ipsum > quis > vestibulum > porta-2 > tortor > in' => [
+                    'dui',
+                    'dolor' => [
+                        'aliquam',
+                    ],
+                ],
+                'ipsum > quis > vestibulum > porta-3 > 0'           => 1,
+                'ipsum > quis > vestibulum > porta-3 > 1'           => 2,
+                'ipsum > quis > vestibulum > porta-3 > 2'           => 3,
+                'primis > 0'                                        => [
+                    'in',
+                    'faucibus',
+                    'orci',
+                ],
+                'primis > 1'                                        => [
+                    'luctus',
+                    'et',
+                    'ultrices',
+                ],
+            ],
+        ];
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -1877,10 +1924,12 @@ letsTest[2] = value_2;';
     {
         parent::tearDown();
 
-        unset($this->simpleArray);
-        unset($this->simpleArrayWithKeys);
-        unset($this->twoDimensionsArray);
-        unset($this->complexArray);
-        unset($this->superComplexArray);
+        unset(
+            $this->simpleArray,
+            $this->simpleArrayWithKeys,
+            $this->twoDimensionsArray,
+            $this->complexArray,
+            $this->superComplexArray
+        );
     }
 }

tests/Utilities/Bootstrap4CssSelectorTest.php

@@ -0,0 +1,185 @@
+<?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 Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Utilities\Bootstrap4CssSelector;
+
+/**
+ * Test case of the useful methods related to CSS selectors and the Bootstrap4 (front-end component library)
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class Bootstrap4CssSelectorTest extends BaseTestCase
+{
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(Bootstrap4CssSelector::class);
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetRadioButtonErrorSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldSetIndex = 1;
+        static::assertSame('', Bootstrap4CssSelector::getRadioButtonErrorSelector($emptyValue, $fieldSetIndex));
+    }
+
+    public function testGetRadioButtonErrorSelectorUsingNegativeFieldSetIndex()
+    {
+        static::assertSame('', Bootstrap4CssSelector::getRadioButtonErrorSelector('test-test', -1));
+    }
+
+    /**
+     * @param string $formName      Name of form (value of the "name" attribute)
+     * @param int    $fieldSetIndex Index/Position of the field-set
+     * @param string $expected      Expected selector
+     *
+     * @dataProvider provideFormNameFieldSetIndexAndSelector
+     */
+    public function testGetRadioButtonErrorSelector($formName, $fieldSetIndex, $expected)
+    {
+        static::assertSame($expected, Bootstrap4CssSelector::getRadioButtonErrorSelector($formName, $fieldSetIndex));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetFieldErrorSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldName = 'test';
+        static::assertSame('', Bootstrap4CssSelector::getFieldErrorSelector($emptyValue, $fieldName));
+    }
+
+    /**
+     * @param string $emptyValue Name of field (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetFieldErrorSelectorUsingEmptyFieldName($emptyValue)
+    {
+        $formName = 'test';
+        static::assertSame('', Bootstrap4CssSelector::getFieldErrorSelector($formName, $emptyValue));
+    }
+
+    /**
+     * @param string $formName  Name of form (value of the "name" attribute)
+     * @param string $fieldName Name of field (value of the "name" attribute)
+     * @param string $expected  Expected selector
+     *
+     * @dataProvider provideFormNameFieldNameAndSelector
+     */
+    public function testGetFieldErrorSelector($formName, $fieldName, $expected)
+    {
+        static::assertSame($expected, Bootstrap4CssSelector::getFieldErrorSelector($formName, $fieldName));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetFieldGroupSelectorUsingEmptyFormName($emptyValue)
+    {
+        static::assertSame('', Bootstrap4CssSelector::getFieldGroupSelector($emptyValue));
+    }
+
+    /**
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $expected Expected selector
+     *
+     * @dataProvider provideFormNameAndSelector
+     */
+    public function testGetFieldGroupSelector($formName, $expected)
+    {
+        static::assertSame($expected, Bootstrap4CssSelector::getFieldGroupSelector($formName));
+    }
+
+    public function testGetFieldErrorContainerSelector()
+    {
+        static::assertSame('.invalid-feedback .form-error-message', Bootstrap4CssSelector::getFieldErrorContainerSelector());
+    }
+
+    /**
+     * Provides name of form, index/position of the field-set and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldSetIndexAndSelector()
+    {
+        yield[
+            'test',
+            0,
+            'form[name="test"] fieldset:nth-of-type(0) legend.col-form-label .invalid-feedback .form-error-message',
+        ];
+
+        yield[
+            'test-123-test-456',
+            1,
+            'form[name="test-123-test-456"] fieldset:nth-of-type(1) legend.col-form-label .invalid-feedback .form-error-message',
+        ];
+
+        yield[
+            'test_something_098_different',
+            1245,
+            'form[name="test_something_098_different"] fieldset:nth-of-type(1245) legend.col-form-label .invalid-feedback .form-error-message',
+        ];
+    }
+
+    /**
+     * Provides name of form, name of field and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldNameAndSelector()
+    {
+        yield[
+            'test',
+            'test',
+            'form[name="test"] label[for="test"] .invalid-feedback .form-error-message',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'great-000-field',
+            'form[name="test-123-test-456"] label[for="great-000-field"] .invalid-feedback .form-error-message',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'this-is-the-123789-field',
+            'form[name="test_something_098_different"] label[for="this-is-the-123789-field"] .invalid-feedback .form-error-message',
+        ];
+    }
+
+    /**
+     * Provides name of form and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameAndSelector()
+    {
+        yield[
+            'test',
+            'form[name="test"] .form-group',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'form[name="test-123-test-456"] .form-group',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'form[name="test_something_098_different"] .form-group',
+        ];
+    }
+}

tests/Utilities/CssSelectorTest.php

@@ -0,0 +1,296 @@
+<?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 Meritoo\Common\Test\Base\BaseTestCase;
+use Meritoo\Common\Utilities\CssSelector;
+
+/**
+ * Test case of the useful methods related to CSS selectors
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class CssSelectorTest extends BaseTestCase
+{
+    public function testConstructor()
+    {
+        static::assertHasNoConstructor(CssSelector::class);
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetFormByNameSelectorUsingEmptyName($emptyValue)
+    {
+        static::assertSame('', CssSelector::getFormByNameSelector($emptyValue));
+    }
+
+    /**
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $expected Expected selector
+     *
+     * @dataProvider provideFormNameAndSelector
+     */
+    public function testGetFormByNameSelector($formName, $expected)
+    {
+        static::assertSame($expected, CssSelector::getFormByNameSelector($formName));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetInputByNameSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldName = 'test-test';
+        static::assertSame('', CssSelector::getInputByNameSelector($emptyValue, $fieldName));
+    }
+
+    /**
+     * @param string $emptyValue Name of field (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetInputByNameSelectorUsingEmptyFieldName($emptyValue)
+    {
+        $formName = 'test-test';
+        static::assertSame('', CssSelector::getInputByNameSelector($formName, $emptyValue));
+    }
+
+    /**
+     * @param string $formName  Name of form (value of the "name" attribute)
+     * @param string $fieldName Name of field (value of the "name" attribute)
+     * @param string $expected  Expected selector
+     *
+     * @dataProvider provideFormNameFieldNameAndSelector
+     */
+    public function testGetInputByNameSelector($formName, $fieldName, $expected)
+    {
+        static::assertSame($expected, CssSelector::getInputByNameSelector($formName, $fieldName));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetInputByIdSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldId = 'test-test';
+        static::assertSame('', CssSelector::getInputByIdSelector($emptyValue, $fieldId));
+    }
+
+    /**
+     * @param string $emptyValue ID of field (value of the "id" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetInputByIdSelectorUsingEmptyFieldName($emptyValue)
+    {
+        $formName = 'test-test';
+        static::assertSame('', CssSelector::getInputByIdSelector($formName, $emptyValue));
+    }
+
+    /**
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $fieldId  ID of field (value of the "id" attribute)
+     * @param string $expected Expected selector
+     *
+     * @dataProvider provideFormNameFieldIdAndSelector
+     */
+    public function testGetInputByIdSelector($formName, $fieldId, $expected)
+    {
+        static::assertSame($expected, CssSelector::getInputByIdSelector($formName, $fieldId));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetLabelSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldId = 'test-test';
+        static::assertSame('', CssSelector::getLabelSelector($emptyValue, $fieldId));
+    }
+
+    /**
+     * @param string $emptyValue ID of field (value of the "id" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetLabelSelectorUsingEmptyFieldId($emptyValue)
+    {
+        $formName = 'test-test';
+        static::assertSame('', CssSelector::getLabelSelector($formName, $emptyValue));
+    }
+
+    /**
+     * @param string $formName Name of form (value of the "name" attribute)
+     * @param string $fieldId  ID of field (value of the "id" attribute)
+     * @param string $expected Expected selector
+     *
+     * @dataProvider provideFormNameFieldIdAndLabelSelector
+     */
+    public function testGetLabelSelector($formName, $fieldId, $expected)
+    {
+        static::assertSame($expected, CssSelector::getLabelSelector($formName, $fieldId));
+    }
+
+    /**
+     * @param string $emptyValue Name of form (value of the "name" attribute)
+     * @dataProvider provideEmptyScalarValue
+     */
+    public function testGetFieldSetByIndexSelectorUsingEmptyFormName($emptyValue)
+    {
+        $fieldSetIndex = 1;
+        static::assertSame('', CssSelector::getFieldSetByIndexSelector($emptyValue, $fieldSetIndex));
+    }
+
+    public function testGetFieldSetByIndexSelectorUsingNegativeFieldSetIndex()
+    {
+        static::assertSame('', CssSelector::getFieldSetByIndexSelector('test-test', -1));
+    }
+
+    /**
+     * @param string $formName      Name of form (value of the "name" attribute)
+     * @param int    $fieldSetIndex Index/Position of the field-set
+     * @param string $expected      Expected selector
+     *
+     * @dataProvider provideFormNameFieldSetIndexAndSelector
+     */
+    public function testGetFieldSetByIndexSelector($formName, $fieldSetIndex, $expected)
+    {
+        static::assertSame($expected, CssSelector::getFieldSetByIndexSelector($formName, $fieldSetIndex));
+    }
+
+    /**
+     * Provides name of form and selector of the form
+     *
+     * @return \Generator
+     */
+    public function provideFormNameAndSelector()
+    {
+        yield[
+            'test',
+            'form[name="test"]',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'form[name="test-123-test-456"]',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'form[name="test_something_098_different"]',
+        ];
+    }
+
+    /**
+     * Provides name of form, name of field and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldNameAndSelector()
+    {
+        yield[
+            'test',
+            'test',
+            'form[name="test"] input[name="test"]',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'great-000-field',
+            'form[name="test-123-test-456"] input[name="great-000-field"]',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'this-is-the-123789-field',
+            'form[name="test_something_098_different"] input[name="this-is-the-123789-field"]',
+        ];
+    }
+
+    /**
+     * Provides name of form, ID of field and expected selector of label
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldIdAndLabelSelector()
+    {
+        yield[
+            'test',
+            'test',
+            'form[name="test"] label[for="test"]',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'great-000-field',
+            'form[name="test-123-test-456"] label[for="great-000-field"]',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'this-is-the-123789-field',
+            'form[name="test_something_098_different"] label[for="this-is-the-123789-field"]',
+        ];
+    }
+
+    /**
+     * Provides name of form, index/position of the field-set and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldSetIndexAndSelector()
+    {
+        yield[
+            'test',
+            0,
+            'form[name="test"] fieldset:nth-of-type(0)',
+        ];
+
+        yield[
+            'test-123-test-456',
+            1,
+            'form[name="test-123-test-456"] fieldset:nth-of-type(1)',
+        ];
+
+        yield[
+            'test_something_098_different',
+            1245,
+            'form[name="test_something_098_different"] fieldset:nth-of-type(1245)',
+        ];
+    }
+
+    /**
+     * Provides name of form, ID of field and expected selector
+     *
+     * @return \Generator
+     */
+    public function provideFormNameFieldIdAndSelector()
+    {
+        yield[
+            'test',
+            'test',
+            'form[name="test"] input#test',
+        ];
+
+        yield[
+            'test-123-test-456',
+            'great-000-field',
+            'form[name="test-123-test-456"] input#great-000-field',
+        ];
+
+        yield[
+            'test_something_098_different',
+            'this-is-the-123789-field',
+            'form[name="test_something_098_different"] input#this-is-the-123789-field',
+        ];
+    }
+}

tests/Utilities/MiscellaneousTest.php

@@ -164,7 +164,7 @@ class MiscellaneousTest extends BaseTestCase
         $expected = "int(123)\n";
 
         if ($xdebugLoaded) {
-            $libraryPath = realpath(sprintf('%s%s', dirname(__FILE__), '/../..'));
+            $libraryPath = realpath(sprintf('%s%s', __DIR__, '/../..'));
             $filePath = sprintf('%s%s', $libraryPath, '/src/Utilities/Miscellaneous.php:');
 
             /*
@@ -348,7 +348,10 @@ class MiscellaneousTest extends BaseTestCase
 
     public function testGetOperatingSystemNameServer()
     {
-        self::assertEquals(php_uname('s'), Miscellaneous::getOperatingSystemNameServer());
+        /*
+         * While running Docker OS is a Linux
+         */
+        self::assertEquals('Linux', Miscellaneous::getOperatingSystemNameServer());
     }
 
     public function testSubstringToWord()