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

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

    /**
     * testInflectorSlug method
     *
     * @return void
     */
    public function testInflectorSlug()
    {
        $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 testInflectorSlugCharList()
    {
        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);
            }
        }
    }

    /**
     * testInflectorSlugWithMap method
     *
     * @return void
     */
    public function testInflectorSlugWithMap()
    {
        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);
    }

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

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

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

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

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

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

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

    /**
     * testHumanization method
     *
     * @return void
     */
    public function testHumanization()
    {
        $this->assertEquals(Inflector::humanize('posts'), 'Posts');
        $this->assertEquals(Inflector::humanize('posts_tags'), 'Posts Tags');
        $this->assertEquals(Inflector::humanize('file_systems'), '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(Inflector::pluralize('custom'), 'customizables');
        $this->assertEquals(Inflector::pluralize('uninflectable'), 'uninflectable');

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

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

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

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

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

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

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

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

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

        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(Inflector::pluralize('Banana'), 'Banazzz', 'Was inflected with old rules.');
        $this->assertEquals(Inflector::pluralize('corpus'), 'corpora', '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(Inflector::pluralize('Alcool'), 'Alcoois');
        $this->assertEquals(Inflector::pluralize('Atlas'), 'Atlas');
        $this->assertEquals(Inflector::singularize('Alcoois'), 'Alcool');
        $this->assertEquals(Inflector::singularize('Atlas'), 'Atlas');
    }
}