FormHelperTest.php

<?php

namespace Drupal\Tests\Core\Form;

use Drupal\Component\Serialization\Json;
use Drupal\Core\Form\FormHelper;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Form\FormHelper
 * @group Form
 */
class FormHelperTest extends UnitTestCase {
    
    /**
     * Tests rewriting the #states selectors.
     *
     * @covers ::rewriteStatesSelector
     */
    public function testRewriteStatesSelector() {
        // Simple selectors.
        $value = [
            'value' => 'medium',
        ];
        $form['foo']['#states'] = [
            'visible' => [
                'select[name="fields[foo-id][settings_edit_form][settings][image_style]"]' => $value,
            ],
        ];
        FormHelper::rewriteStatesSelector($form, 'fields[foo-id][settings_edit_form]', 'options');
        $expected_selector = 'select[name="options[settings][image_style]"]';
        $this->assertSame($form['foo']['#states']['visible'][$expected_selector], $value, 'The #states selector was not properly rewritten.');
        // Complex selectors.
        $form = [];
        $form['bar']['#states'] = [
            'visible' => [
                [
                    ':input[name="menu[type]"]' => [
                        'value' => 'normal',
                    ],
                ],
                [
                    ':input[name="menu[type]"]' => [
                        'value' => 'tab',
                    ],
                ],
                ':input[name="menu[type]"]' => [
                    'value' => 'default tab',
                ],
            ],
            // Example from https://www.drupal.org/node/1464758
'disabled' => [
                '[name="menu[options][dependee_1]"]' => [
                    'value' => 'ON',
                ],
                [
                    [
                        '[name="menu[options][dependee_2]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                    [
                        '[name="menu[options][dependee_3]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                ],
                [
                    [
                        '[name="menu[options][dependee_4]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                    'xor',
                    [
                        '[name="menu[options][dependee_5]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                ],
            ],
        ];
        $expected['bar']['#states'] = [
            'visible' => [
                [
                    ':input[name="options[type]"]' => [
                        'value' => 'normal',
                    ],
                ],
                [
                    ':input[name="options[type]"]' => [
                        'value' => 'tab',
                    ],
                ],
                ':input[name="options[type]"]' => [
                    'value' => 'default tab',
                ],
            ],
            'disabled' => [
                '[name="options[options][dependee_1]"]' => [
                    'value' => 'ON',
                ],
                [
                    [
                        '[name="options[options][dependee_2]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                    [
                        '[name="options[options][dependee_3]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                ],
                [
                    [
                        '[name="options[options][dependee_4]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                    'xor',
                    [
                        '[name="options[options][dependee_5]"]' => [
                            'value' => 'ON',
                        ],
                    ],
                ],
            ],
        ];
        FormHelper::rewriteStatesSelector($form, 'menu', 'options');
        $this->assertSame($expected, $form, 'The #states selectors were properly rewritten.');
    }
    
    /**
     * @covers ::processStates
     * @dataProvider providerElements
     */
    public function testProcessStates($elements, $key) {
        $json = Json::encode($elements['#states']);
        FormHelper::processStates($elements);
        $this->assertEquals([
            'core/drupal.states',
        ], $elements['#attached']['library']);
        $this->assertEquals($json, $elements[$key]['data-drupal-states']);
    }
    
    /**
     * Provides a list of elements to test.
     */
    public function providerElements() {
        return [
            [
                [
                    '#type' => 'date',
                    '#states' => [
                        'visible' => [
                            ':input[name="toggle_me"]' => [
                                'checked' => TRUE,
                            ],
                        ],
                    ],
                ],
                '#attributes',
            ],
            [
                [
                    '#type' => 'item',
                    '#states' => [
                        'visible' => [
                            ':input[name="foo"]' => [
                                'value' => 'bar',
                            ],
                        ],
                    ],
                ],
                '#wrapper_attributes',
            ],
        ];
    }

}