AttributeHelperTest.php

<?php

namespace Drupal\Tests\Core\Template;

use Drupal\Core\Template\Attribute;
use Drupal\Core\Template\AttributeHelper;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Template\AttributeHelper
 * @group Template
 */
class AttributeHelperTest extends UnitTestCase {
    
    /**
     * Provides tests data for testAttributeExists.
     *
     * @return array
     *   An array of test data each containing an array of attributes, the name
     *   of the attribute to check existence of, and the expected result.
     */
    public function providerTestAttributeExists() {
        return [
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                'class',
                TRUE,
            ],
            [
                [],
                'class',
                FALSE,
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                'id',
                FALSE,
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                    'id' => 'foo',
                ],
                'id',
                TRUE,
            ],
            [
                [
                    'id' => 'foo',
                ],
                'class',
                FALSE,
            ],
        ];
    }
    
    /**
     * @covers ::attributeExists
     * @dataProvider providerTestAttributeExists
     */
    public function testAttributeExists(array $test_data, $test_attribute, $expected) {
        $this->assertSame($expected, AttributeHelper::attributeExists($test_attribute, $test_data));
        $attributes = new Attribute($test_data);
        $this->assertSame($expected, AttributeHelper::attributeExists($test_attribute, $attributes));
    }
    
    /**
     * Provides tests data for testMergeCollections.
     *
     * @return array
     *   An array of test data each containing an initial attribute collection, an
     *   Attribute object or array to be merged, and the expected result.
     */
    public function providerTestMergeCollections() {
        return [
            [
                [],
                [
                    'class' => [
                        'class1',
                    ],
                ],
                [
                    'class' => [
                        'class1',
                    ],
                ],
            ],
            [
                [],
                new Attribute([
                    'class' => [
                        'class1',
                    ],
                ]),
                [
                    'class' => [
                        'class1',
                    ],
                ],
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                [
                    'class' => [
                        'class1',
                    ],
                ],
                [
                    'class' => [
                        'example-class',
                        'class1',
                    ],
                ],
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                new Attribute([
                    'class' => [
                        'class1',
                    ],
                ]),
                [
                    'class' => [
                        'example-class',
                        'class1',
                    ],
                ],
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                [
                    'id' => 'foo',
                    'href' => 'bar',
                ],
                [
                    'class' => [
                        'example-class',
                    ],
                    'id' => 'foo',
                    'href' => 'bar',
                ],
            ],
            [
                [
                    'class' => [
                        'example-class',
                    ],
                ],
                new Attribute([
                    'id' => 'foo',
                    'href' => 'bar',
                ]),
                [
                    'class' => [
                        'example-class',
                    ],
                    'id' => 'foo',
                    'href' => 'bar',
                ],
            ],
        ];
    }
    
    /**
     * @covers ::mergeCollections
     * @dataProvider providerTestMergeCollections
     */
    public function testMergeCollections($original, $merge, $expected) {
        $this->assertEquals($expected, AttributeHelper::mergeCollections($original, $merge));
        $this->assertEquals(new Attribute($expected), AttributeHelper::mergeCollections(new Attribute($original), $merge));
    }
    
    /**
     * @covers ::mergeCollections
     */
    public function testMergeCollectionsArgumentException() {
        $attributes = new Attribute([
            'class' => [
                'example-class',
            ],
        ]);
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Invalid collection argument');
        AttributeHelper::mergeCollections($attributes, 'not an array');
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Invalid collection argument');
        AttributeHelper::mergeCollections('not an array', $attributes);
    }

}