cakephp/tests/TestCase/Utility/InflectorTest.php

<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://book.cakephp.org/2.0/en/development/testing.html
 * @since         1.2.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Test\TestCase\Utility;

use Cake\TestSuite\TestCase;
use Cake\Utility\Inflector;

/**
 * Short description for class.
 *
 */
class InflectorTest extends TestCase
{

    /**
     * A list of chars to test transliteration.
     *
     * @var array
     */
    public static $maps = [
        'de' => [ /* German */
            'Ä' => 'Ae', 'Ö' => 'Oe', 'Ü' => 'Ue', 'ä' => 'ae', 'ö' => 'oe', 'ü' => 'ue', 'ß' => 'ss',
            'ẞ' => 'SS'
        ],
        'latin' => [
            'À' => 'A', 'Á' => 'A', 'Â' => 'A', 'Ã' => 'A', 'Å' => 'A', 'Ă' => 'A', 'Æ' => 'AE', 'Ç' =>
            'C', 'È' => 'E', 'É' => 'E', 'Ê' => 'E', 'Ë' => 'E', 'Ì' => 'I', 'Í' => 'I', 'Î' => 'I',
            'Ï' => 'I', 'Ð' => 'D', 'Ñ' => 'N', 'Ò' => 'O', 'Ó' => 'O', 'Ô' => 'O', 'Õ' => 'O', 'Ő' => 'O', 'Ø' => 'O',
            'Ș' => 'S', 'Ț' => 'T', 'Ù' => 'U', 'Ú' => 'U', 'Û' => 'U', 'Ű' => 'U',
            'Ý' => 'Y', 'Þ' => 'TH', 'à' => 'a', 'á' => 'a', 'â' => 'a', 'ã' => 'a',
            'å' => 'a', 'ă' => 'a', 'æ' => 'ae', 'ç' => 'c', 'è' => 'e', 'é' => 'e', 'ê' => 'e', 'ë' => 'e',
            'ì' => 'i', 'í' => 'i', 'î' => 'i', 'ï' => 'i', 'ð' => 'd', 'ñ' => 'n', 'ò' => 'o', 'ó' =>
            'o', 'ô' => 'o', 'õ' => 'o', 'ő' => 'o', 'ø' => 'o', 'ș' => 's', 'ț' => 't', 'ù' => 'u', 'ú' => 'u',
            'û' => 'u', 'ű' => 'u', 'ý' => 'y', 'þ' => 'th', 'ÿ' => 'y'
        ],
        'tr' => [ /* Turkish */
            'ş' => 's', 'Ş' => 'S', 'ı' => 'i', 'İ' => 'I', 'ç' => 'c', 'Ç' => 'C', 'ğ' => 'g', 'Ğ' => 'G'
        ],
        'uk' => [ /* Ukrainian */
            'Є' => 'Ye', 'І' => 'I', 'Ї' => 'Yi', 'Ґ' => 'G', 'є' => 'ye', 'і' => 'i', 'ї' => 'yi', 'ґ' => 'g'
        ],
        'cs' => [ /* Czech */
            'č' => 'c', 'ď' => 'd', 'ě' => 'e', 'ň' => 'n', 'ř' => 'r', 'š' => 's', 'ť' => 't', 'ů' => 'u',
            'ž' => 'z', 'Č' => 'C', 'Ď' => 'D', 'Ě' => 'E', 'Ň' => 'N', 'Ř' => 'R', 'Š' => 'S', 'Ť' => 'T',
            'Ů' => 'U', 'Ž' => 'Z'
        ],
        'pl' => [ /* Polish */
            'ą' => 'a', 'ć' => 'c', 'ę' => 'e', 'ł' => 'l', 'ń' => 'n', 'ó' => 'o', 'ś' => 's', 'ź' => 'z',
            'ż' => 'z', 'Ą' => 'A', 'Ć' => 'C', 'Ł' => 'L', 'Ń' => 'N', 'Ó' => 'O', 'Ś' => 'S',
            'Ź' => 'Z', 'Ż' => 'Z'
        ],
        'ro' => [ /* Romanian */
            'ă' => 'a', 'â' => 'a', 'î' => 'i', 'ș' => 's', 'ț' => 't', 'Ţ' => 'T', 'ţ' => 't'
        ],
        'lv' => [ /* Latvian */
            'ā' => 'a', 'č' => 'c', 'ē' => 'e', 'ģ' => 'g', 'ī' => 'i', 'ķ' => 'k', 'ļ' => 'l', 'ņ' => 'n',
            'š' => 's', 'ū' => 'u', 'ž' => 'z', 'Ā' => 'A', 'Č' => 'C', 'Ē' => 'E', 'Ģ' => 'G', 'Ī' => 'I',
            'Ķ' => 'K', 'Ļ' => 'L', 'Ņ' => 'N', 'Š' => 'S', 'Ū' => 'U', 'Ž' => 'Z'
        ],
        'lt' => [ /* Lithuanian */
            'ą' => 'a', 'č' => 'c', 'ę' => 'e', 'ė' => 'e', 'į' => 'i', 'š' => 's', 'ų' => 'u', 'ū' => 'u', 'ž' => 'z',
            'Ą' => 'A', 'Č' => 'C', 'Ę' => 'E', 'Ė' => 'E', 'Į' => 'I', 'Š' => 'S', 'Ų' => 'U', 'Ū' => 'U', 'Ž' => 'Z'
        ]
    ];

    /**
     * tearDown
     *
     * @return void
     */
    public function tearDown()
    {
        parent::tearDown();
        Inflector::reset();
    }

    /**
     * testInflectingSingulars method
     *
     * @return void
     */
    public function testInflectingSingulars()
    {
        $this->assertEquals('categoria', Inflector::singularize('categorias'));
        $this->assertEquals('menu', Inflector::singularize('menus'));
        $this->assertEquals('news', Inflector::singularize('news'));
        $this->assertEquals('food_menu', Inflector::singularize('food_menus'));
        $this->assertEquals('Menu', Inflector::singularize('Menus'));
        $this->assertEquals('FoodMenu', Inflector::singularize('FoodMenus'));
        $this->assertEquals('house', Inflector::singularize('houses'));
        $this->assertEquals('powerhouse', Inflector::singularize('powerhouses'));
        $this->assertEquals('quiz', Inflector::singularize('quizzes'));
        $this->assertEquals('Bus', Inflector::singularize('Buses'));
        $this->assertEquals('bus', Inflector::singularize('buses'));
        $this->assertEquals('matrix_row', Inflector::singularize('matrix_rows'));
        $this->assertEquals('matrix', Inflector::singularize('matrices'));
        $this->assertEquals('vertex', Inflector::singularize('vertices'));
        $this->assertEquals('index', Inflector::singularize('indices'));
        $this->assertEquals('Alias', Inflector::singularize('Aliases'));
        $this->assertEquals('Alias', Inflector::singularize('Alias'));
        $this->assertEquals('Media', Inflector::singularize('Media'));
        $this->assertEquals('NodeMedia', Inflector::singularize('NodeMedia'));
        $this->assertEquals('alumnus', Inflector::singularize('alumni'));
        $this->assertEquals('bacillus', Inflector::singularize('bacilli'));
        $this->assertEquals('cactus', Inflector::singularize('cacti'));
        $this->assertEquals('focus', Inflector::singularize('foci'));
        $this->assertEquals('fungus', Inflector::singularize('fungi'));
        $this->assertEquals('nucleus', Inflector::singularize('nuclei'));
        $this->assertEquals('octopus', Inflector::singularize('octopuses'));
        $this->assertEquals('radius', Inflector::singularize('radii'));
        $this->assertEquals('stimulus', Inflector::singularize('stimuli'));
        $this->assertEquals('syllabus', Inflector::singularize('syllabi'));
        $this->assertEquals('terminus', Inflector::singularize('termini'));
        $this->assertEquals('virus', Inflector::singularize('viri'));
        $this->assertEquals('person', Inflector::singularize('people'));
        $this->assertEquals('glove', Inflector::singularize('gloves'));
        $this->assertEquals('dove', Inflector::singularize('doves'));
        $this->assertEquals('life', Inflector::singularize('lives'));
        $this->assertEquals('knife', Inflector::singularize('knives'));
        $this->assertEquals('wolf', Inflector::singularize('wolves'));
        $this->assertEquals('slave', Inflector::singularize('slaves'));
        $this->assertEquals('shelf', Inflector::singularize('shelves'));
        $this->assertEquals('taxi', Inflector::singularize('taxis'));
        $this->assertEquals('tax', Inflector::singularize('taxes'));
        $this->assertEquals('Tax', Inflector::singularize('Taxes'));
        $this->assertEquals('AwesomeTax', Inflector::singularize('AwesomeTaxes'));
        $this->assertEquals('fax', Inflector::singularize('faxes'));
        $this->assertEquals('wax', Inflector::singularize('waxes'));
        $this->assertEquals('niche', Inflector::singularize('niches'));
        $this->assertEquals('cave', Inflector::singularize('caves'));
        $this->assertEquals('grave', Inflector::singularize('graves'));
        $this->assertEquals('wave', Inflector::singularize('waves'));
        $this->assertEquals('bureau', Inflector::singularize('bureaus'));
        $this->assertEquals('genetic_analysis', Inflector::singularize('genetic_analyses'));
        $this->assertEquals('doctor_diagnosis', Inflector::singularize('doctor_diagnoses'));
        $this->assertEquals('paranthesis', Inflector::singularize('parantheses'));
        $this->assertEquals('Cause', Inflector::singularize('Causes'));
        $this->assertEquals('colossus', Inflector::singularize('colossuses'));
        $this->assertEquals('diagnosis', Inflector::singularize('diagnoses'));
        $this->assertEquals('basis', Inflector::singularize('bases'));
        $this->assertEquals('analysis', Inflector::singularize('analyses'));
        $this->assertEquals('curve', Inflector::singularize('curves'));
        $this->assertEquals('cafe', Inflector::singularize('cafes'));
        $this->assertEquals('roof', Inflector::singularize('roofs'));
        $this->assertEquals('foe', Inflector::singularize('foes'));
        $this->assertEquals('database', Inflector::singularize('databases'));
        $this->assertEquals('cookie', Inflector::singularize('cookies'));
        $this->assertEquals('thief', Inflector::singularize('thieves'));
        $this->assertEquals('potato', Inflector::singularize('potatoes'));
        $this->assertEquals('hero', Inflector::singularize('heroes'));
        $this->assertEquals('buffalo', Inflector::singularize('buffaloes'));
        $this->assertEquals('baby', Inflector::singularize('babies'));
        $this->assertEquals('tooth', Inflector::singularize('teeth'));
        $this->assertEquals('goose', Inflector::singularize('geese'));
        $this->assertEquals('foot', Inflector::singularize('feet'));
        $this->assertEquals('objective', Inflector::singularize('objectives'));
        $this->assertEquals('archive', Inflector::singularize('archives'));
        $this->assertEquals('brief', Inflector::singularize('briefs'));
        $this->assertEquals('quota', Inflector::singularize('quotas'));
        $this->assertEquals('curve', Inflector::singularize('curves'));
        $this->assertEquals('body_curve', Inflector::singularize('body_curves'));
        $this->assertEquals('metadata', Inflector::singularize('metadata'));
        $this->assertEquals('files_metadata', Inflector::singularize('files_metadata'));
        $this->assertEquals('address', Inflector::singularize('addresses'));
        $this->assertEquals('', Inflector::singularize(''));
    }

    /**
     * testInflectingPlurals method
     *
     * @return void
     */
    public function testInflectingPlurals()
    {
        $this->assertEquals('axmen', Inflector::pluralize('axman'));
        $this->assertEquals('men', Inflector::pluralize('man'));
        $this->assertEquals('women', Inflector::pluralize('woman'));
        $this->assertEquals('humans', Inflector::pluralize('human'));
        $this->assertEquals('axmen', Inflector::pluralize('axman'));
        $this->assertEquals('men', Inflector::pluralize('man'));
        $this->assertEquals('women', Inflector::pluralize('woman'));
        $this->assertEquals('humans', Inflector::pluralize('human'));
        $this->assertEquals('categorias', Inflector::pluralize('categoria'));
        $this->assertEquals('houses', Inflector::pluralize('house'));
        $this->assertEquals('powerhouses', Inflector::pluralize('powerhouse'));
        $this->assertEquals('Buses', Inflector::pluralize('Bus'));
        $this->assertEquals('buses', Inflector::pluralize('bus'));
        $this->assertEquals('menus', Inflector::pluralize('menu'));
        $this->assertEquals('news', Inflector::pluralize('news'));
        $this->assertEquals('food_menus', Inflector::pluralize('food_menu'));
        $this->assertEquals('Menus', Inflector::pluralize('Menu'));
        $this->assertEquals('FoodMenus', Inflector::pluralize('FoodMenu'));
        $this->assertEquals('quizzes', Inflector::pluralize('quiz'));
        $this->assertEquals('matrix_rows', Inflector::pluralize('matrix_row'));
        $this->assertEquals('matrices', Inflector::pluralize('matrix'));
        $this->assertEquals('vertices', Inflector::pluralize('vertex'));
        $this->assertEquals('indices', Inflector::pluralize('index'));
        $this->assertEquals('Aliases', Inflector::pluralize('Alias'));
        $this->assertEquals('Aliases', Inflector::pluralize('Aliases'));
        $this->assertEquals('Media', Inflector::pluralize('Media'));
        $this->assertEquals('NodeMedia', Inflector::pluralize('NodeMedia'));
        $this->assertEquals('alumni', Inflector::pluralize('alumnus'));
        $this->assertEquals('bacilli', Inflector::pluralize('bacillus'));
        $this->assertEquals('cacti', Inflector::pluralize('cactus'));
        $this->assertEquals('foci', Inflector::pluralize('focus'));
        $this->assertEquals('fungi', Inflector::pluralize('fungus'));
        $this->assertEquals('nuclei', Inflector::pluralize('nucleus'));
        $this->assertEquals('octopuses', Inflector::pluralize('octopus'));
        $this->assertEquals('radii', Inflector::pluralize('radius'));
        $this->assertEquals('stimuli', Inflector::pluralize('stimulus'));
        $this->assertEquals('syllabi', Inflector::pluralize('syllabus'));
        $this->assertEquals('termini', Inflector::pluralize('terminus'));
        $this->assertEquals('viri', Inflector::pluralize('virus'));
        $this->assertEquals('people', Inflector::pluralize('person'));
        $this->assertEquals('people', Inflector::pluralize('people'));
        $this->assertEquals('gloves', Inflector::pluralize('glove'));
        $this->assertEquals('crises', Inflector::pluralize('crisis'));
        $this->assertEquals('taxes', Inflector::pluralize('tax'));
        $this->assertEquals('waves', Inflector::pluralize('wave'));
        $this->assertEquals('bureaus', Inflector::pluralize('bureau'));
        $this->assertEquals('cafes', Inflector::pluralize('cafe'));
        $this->assertEquals('roofs', Inflector::pluralize('roof'));
        $this->assertEquals('foes', Inflector::pluralize('foe'));
        $this->assertEquals('cookies', Inflector::pluralize('cookie'));
        $this->assertEquals('wolves', Inflector::pluralize('wolf'));
        $this->assertEquals('thieves', Inflector::pluralize('thief'));
        $this->assertEquals('potatoes', Inflector::pluralize('potato'));
        $this->assertEquals('heroes', Inflector::pluralize('hero'));
        $this->assertEquals('buffaloes', Inflector::pluralize('buffalo'));
        $this->assertEquals('teeth', Inflector::pluralize('tooth'));
        $this->assertEquals('geese', Inflector::pluralize('goose'));
        $this->assertEquals('feet', Inflector::pluralize('foot'));
        $this->assertEquals('objectives', Inflector::pluralize('objective'));
        $this->assertEquals('briefs', Inflector::pluralize('brief'));
        $this->assertEquals('quotas', Inflector::pluralize('quota'));
        $this->assertEquals('curves', Inflector::pluralize('curve'));
        $this->assertEquals('body_curves', Inflector::pluralize('body_curve'));
        $this->assertEquals('metadata', Inflector::pluralize('metadata'));
        $this->assertEquals('files_metadata', Inflector::pluralize('files_metadata'));
        $this->assertEquals('stadia', Inflector::pluralize('stadia'));
        $this->assertEquals('Addresses', Inflector::pluralize('Address'));
        $this->assertEquals('', Inflector::pluralize(''));
    }

    /**
     * testSlug method
     *
     * @return void
     */
    public function testSlug()
    {
        $result = Inflector::slug('Foo Bar: Not just for breakfast any-more');
        $expected = 'Foo-Bar-Not-just-for-breakfast-any-more';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('this/is/a/path');
        $expected = 'this-is-a-path';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('Foo Bar: Not just for breakfast any-more', '_');
        $expected = 'Foo_Bar_Not_just_for_breakfast_any_more';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('Foo Bar: Not just for breakfast any-more', '+');
        $expected = 'Foo+Bar+Not+just+for+breakfast+any+more';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('Äpfel Über Öl grün ärgert groß öko', '-');
        $expected = 'Aepfel-Ueber-Oel-gruen-aergert-gross-oeko';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('The truth - and- more- news', '-');
        $expected = 'The-truth-and-more-news';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('The truth: and more news', '-');
        $expected = 'The-truth-and-more-news';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('La langue française est un attribut de souveraineté en France', '-');
        $expected = 'La-langue-francaise-est-un-attribut-de-souverainete-en-France';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('!@$#exciting stuff! - what !@-# was that?', '-');
        $expected = 'exciting-stuff-what-was-that';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('20% of profits went to me!', '-');
        $expected = '20-of-profits-went-to-me';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('#this melts your face1#2#3', '-');
        $expected = 'this-melts-your-face1-2-3';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('controller/action/りんご/1');
        $expected = 'controller-action-りんご-1';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('の話が出たので大丈夫かなあと');
        $expected = 'の話が出たので大丈夫かなあと';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('posts/view/한국어/page:1/sort:asc');
        $expected = 'posts-view-한국어-page-1-sort-asc';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug("non\xc2\xa0breaking\xc2\xa0space");
        $this->assertEquals('non-breaking-space', $result);
    }

    /**
     * Test slug() with a complete list of special chars.
     *
     * @return void
     */
    public function testSlugCharList()
    {
        foreach (self::$maps as $language => $list) {
            foreach ($list as $from => $to) {
                $result = Inflector::slug($from);
                $this->assertEquals($to, $result, $from . ' (' . $language . ') should be ' . $to . ' - but is ' . $result);
            }
        }
    }

    /**
     * testSlugWithMap method
     *
     * @return void
     */
    public function testSlugWithMap()
    {
        Inflector::rules('transliteration', ['r' => '1']);
        $result = Inflector::slug('replace every r');
        $expected = '1eplace-eve1y-1';
        $this->assertEquals($expected, $result);

        $result = Inflector::slug('replace every r', '_');
        $expected = '1eplace_eve1y_1';
        $this->assertEquals($expected, $result);
    }

    /**
     * testSlugWithMapOverridingDefault method
     *
     * @return void
     */
    public function testSlugWithMapOverridingDefault()
    {
        Inflector::rules('transliteration', ['å' => 'aa', 'ø' => 'oe']);
        $result = Inflector::slug('Testing æ ø å', '-');
        $expected = 'Testing-ae-oe-aa';
        $this->assertEquals($expected, $result);
    }

    /**
     * testUnderscore method
     *
     * @return void
     */
    public function testUnderscore()
    {
        $this->assertSame('test_thing', Inflector::underscore('TestThing'));
        $this->assertSame('test_thing', Inflector::underscore('testThing'));
        $this->assertSame('test_thing_extra', Inflector::underscore('TestThingExtra'));
        $this->assertSame('test_thing_extra', Inflector::underscore('testThingExtra'));
        $this->assertSame('test_this_thing', Inflector::underscore('test-this-thing'));

        // Identical checks test the cache code path.
        $this->assertSame('test_thing', Inflector::underscore('TestThing'));
        $this->assertSame('test_thing', Inflector::underscore('testThing'));
        $this->assertSame('test_thing_extra', Inflector::underscore('TestThingExtra'));
        $this->assertSame('test_thing_extra', Inflector::underscore('testThingExtra'));

        // Test stupid values
        $this->assertSame('', Inflector::underscore(''));
        $this->assertSame('0', Inflector::underscore(0));
        $this->assertSame('', Inflector::underscore(false));
    }

    /**
     * testDasherized method
     *
     * @return void
     */
    public function testDasherized()
    {
        $this->assertSame('test-thing', Inflector::dasherize('TestThing'));
        $this->assertSame('test-thing', Inflector::dasherize('testThing'));
        $this->assertSame('test-thing-extra', Inflector::dasherize('TestThingExtra'));
        $this->assertSame('test-thing-extra', Inflector::dasherize('testThingExtra'));
        $this->assertSame('test-this-thing', Inflector::dasherize('test_this_thing'));

        // Test stupid values
        $this->assertSame('', Inflector::dasherize(null));
        $this->assertSame('', Inflector::dasherize(''));
        $this->assertSame('0', Inflector::dasherize(0));
        $this->assertSame('', Inflector::dasherize(false));
    }

    /**
     * Demonstrate the expected output for bad inputs
     *
     * @return void
     */
    public function testCamelize()
    {
        $this->assertSame('TestThing', Inflector::camelize('test_thing'));
        $this->assertSame('Test-thing', Inflector::camelize('test-thing'));
        $this->assertSame('TestThing', Inflector::camelize('test thing'));

        $this->assertSame('Test_thing', Inflector::camelize('test_thing', '-'));
        $this->assertSame('TestThing', Inflector::camelize('test-thing', '-'));
        $this->assertSame('TestThing', Inflector::camelize('test thing', '-'));

        $this->assertSame('Test_thing', Inflector::camelize('test_thing', ' '));
        $this->assertSame('Test-thing', Inflector::camelize('test-thing', ' '));
        $this->assertSame('TestThing', Inflector::camelize('test thing', ' '));

        $this->assertSame('TestPlugin.TestPluginComments', Inflector::camelize('TestPlugin.TestPluginComments'));
    }

    /**
     * testVariableNaming method
     *
     * @return void
     */
    public function testVariableNaming()
    {
        $this->assertEquals('testField', Inflector::variable('test_field'));
        $this->assertEquals('testFieLd', Inflector::variable('test_fieLd'));
        $this->assertEquals('testField', Inflector::variable('test field'));
        $this->assertEquals('testField', Inflector::variable('Test_field'));
    }

    /**
     * testClassNaming method
     *
     * @return void
     */
    public function testClassNaming()
    {
        $this->assertEquals('ArtistsGenre', Inflector::classify('artists_genres'));
        $this->assertEquals('FileSystem', Inflector::classify('file_systems'));
        $this->assertEquals('News', Inflector::classify('news'));
        $this->assertEquals('Bureau', Inflector::classify('bureaus'));
    }

    /**
     * testTableNaming method
     *
     * @return void
     */
    public function testTableNaming()
    {
        $this->assertEquals('artists_genres', Inflector::tableize('ArtistsGenre'));
        $this->assertEquals('file_systems', Inflector::tableize('FileSystem'));
        $this->assertEquals('news', Inflector::tableize('News'));
        $this->assertEquals('bureaus', Inflector::tableize('Bureau'));
    }

    /**
     * testHumanization method
     *
     * @return void
     */
    public function testHumanization()
    {
        $this->assertEquals('Posts', Inflector::humanize('posts'));
        $this->assertEquals('Posts Tags', Inflector::humanize('posts_tags'));
        $this->assertEquals('File Systems', Inflector::humanize('file_systems'));
        $this->assertSame('', Inflector::humanize(null));
        $this->assertSame('', Inflector::humanize(false));
    }

    /**
     * testCustomPluralRule method
     *
     * @return void
     */
    public function testCustomPluralRule()
    {
        Inflector::rules('plural', ['/^(custom)$/i' => '\1izables']);
        Inflector::rules('uninflected', ['uninflectable']);

        $this->assertEquals('customizables', Inflector::pluralize('custom'));
        $this->assertEquals('uninflectable', Inflector::pluralize('uninflectable'));

        Inflector::rules('plural', ['/^(alert)$/i' => '\1ables']);
        Inflector::rules('irregular', ['amaze' => 'amazable', 'phone' => 'phonezes']);
        Inflector::rules('uninflected', ['noflect', 'abtuse']);
        $this->assertEquals('noflect', Inflector::pluralize('noflect'));
        $this->assertEquals('abtuse', Inflector::pluralize('abtuse'));
        $this->assertEquals('alertables', Inflector::pluralize('alert'));
        $this->assertEquals('amazable', Inflector::pluralize('amaze'));
        $this->assertEquals('phonezes', Inflector::pluralize('phone'));
    }

    /**
     * testCustomSingularRule method
     *
     * @return void
     */
    public function testCustomSingularRule()
    {
        Inflector::rules('uninflected', ['singulars']);
        Inflector::rules('singular', ['/(eple)r$/i' => '\1', '/(jente)r$/i' => '\1']);

        $this->assertEquals('eple', Inflector::singularize('epler'));
        $this->assertEquals('jente', Inflector::singularize('jenter'));

        Inflector::rules('singular', ['/^(bil)er$/i' => '\1', '/^(inflec|contribu)tors$/i' => '\1ta']);
        Inflector::rules('irregular', ['spinor' => 'spins']);

        $this->assertEquals('spinor', Inflector::singularize('spins'));
        $this->assertEquals('inflecta', Inflector::singularize('inflectors'));
        $this->assertEquals('contributa', Inflector::singularize('contributors'));
        $this->assertEquals('singulars', Inflector::singularize('singulars'));
    }

    /**
     * testCustomTransliterationRule method
     *
     * @return void
     */
    public function testCustomTransliterationRule()
    {
        $this->assertEquals('Testing-ae-o-a', Inflector::slug('Testing æ ø å'));

        Inflector::rules('transliteration', ['å' => 'aa', 'ø' => 'oe']);
        $this->assertEquals('Testing-ae-oe-aa', Inflector::slug('Testing æ ø å'));

        Inflector::rules('transliteration', ['æ' => 'ae', 'å' => 'aa'], true);
        $this->assertEquals('Testing-ae-ø-aa', Inflector::slug('Testing æ ø å'));
    }

    /**
     * test that setting new rules clears the inflector caches.
     *
     * @return void
     */
    public function testRulesClearsCaches()
    {
        $this->assertEquals('Banana', Inflector::singularize('Bananas'));
        $this->assertEquals('bananas', Inflector::tableize('Banana'));
        $this->assertEquals('Bananas', Inflector::pluralize('Banana'));

        Inflector::rules('singular', ['/(.*)nas$/i' => '\1zzz']);
        $this->assertEquals('Banazzz', Inflector::singularize('Bananas'), 'Was inflected with old rules.');

        Inflector::rules('plural', ['/(.*)na$/i' => '\1zzz']);
        Inflector::rules('irregular', ['corpus' => 'corpora']);
        $this->assertEquals('Banazzz', Inflector::pluralize('Banana'), 'Was inflected with old rules.');
        $this->assertEquals('corpora', Inflector::pluralize('corpus'), 'Was inflected with old irregular form.');
    }

    /**
     * Test resetting inflection rules.
     *
     * @return void
     */
    public function testCustomRuleWithReset()
    {
        $uninflected = ['atlas', 'lapis', 'onibus', 'pires', 'virus', '.*x'];
        $pluralIrregular = ['as' => 'ases'];

        Inflector::rules('singular', ['/^(.*)(a|e|o|u)is$/i' => '\1\2l'], true);
        Inflector::rules('plural', ['/^(.*)(a|e|o|u)l$/i' => '\1\2is'], true);
        Inflector::rules('uninflected', $uninflected, true);
        Inflector::rules('irregular', $pluralIrregular, true);

        $this->assertEquals('Alcoois', Inflector::pluralize('Alcool'));
        $this->assertEquals('Atlas', Inflector::pluralize('Atlas'));
        $this->assertEquals('Alcool', Inflector::singularize('Alcoois'));
        $this->assertEquals('Atlas', Inflector::singularize('Atlas'));
    }
}