AttributesTest.php

<?php

namespace Drupal\Tests\Core\Common;

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

/**
 * Tests the Drupal\Core\Template\Attribute functionality.
 *
 * @group Common
 */
class AttributesTest extends UnitTestCase {
    
    /**
     * Provides data for the Attribute test.
     *
     * @return array
     */
    public function providerTestAttributeData() {
        return [
            // Verify that special characters are HTML encoded.
[
                [
                    '&"\'<>' => 'value',
                ],
                ' &amp;&quot;&#039;&lt;&gt;="value"',
                'HTML encode attribute names.',
            ],
            [
                [
                    'title' => '&"\'<>',
                ],
                ' title="&amp;&quot;&#039;&lt;&gt;"',
                'HTML encode attribute values.',
            ],
            // Verify multi-value attributes are concatenated with spaces.
[
                [
                    'class' => [
                        'first',
                        'last',
                    ],
                ],
                ' class="first last"',
                'Concatenate multi-value attributes.',
            ],
            // Verify boolean attribute values are rendered correctly.
[
                [
                    'disabled' => TRUE,
                ],
                ' disabled',
                'Boolean attribute is rendered.',
            ],
            [
                [
                    'disabled' => FALSE,
                ],
                '',
                'Boolean attribute is not rendered.',
            ],
            // Verify empty attribute values are rendered.
[
                [
                    'alt' => '',
                ],
                ' alt=""',
                'Empty attribute value #1.',
            ],
            [
                [
                    'alt' => NULL,
                ],
                '',
                'Null attribute value #2.',
            ],
            // Verify multiple attributes are rendered.
[
                [
                    'id' => 'id-test',
                    'class' => [
                        'first',
                        'last',
                    ],
                    'alt' => 'Alternate',
                ],
                ' id="id-test" class="first last" alt="Alternate"',
                'Multiple attributes.',
            ],
            // Verify empty attributes array is rendered.
[
                [],
                '',
                'Empty attributes array.',
            ],
        ];
    }
    
    /**
     * Tests casting an Attribute object to a string.
     *
     * @see \Drupal\Core\Template\Attribute::__toString()
     *
     * @dataProvider providerTestAttributeData
     */
    public function testDrupalAttributes($attributes, $expected, $message) {
        $this->assertSame($expected, (string) new Attribute($attributes), $message);
    }
    
    /**
     * Tests attribute iteration.
     */
    public function testAttributeIteration() {
        $attribute = new Attribute([
            'key1' => 'value1',
        ]);
        foreach ($attribute as $value) {
            $this->assertSame((string) $value, 'value1', 'Iterate over attribute.');
        }
    }
    
    /**
     * Tests AttributeValueBase copy.
     */
    public function testAttributeValueBaseCopy() {
        $original_attributes = new Attribute([
            'checked' => TRUE,
            'class' => [
                'who',
                'is',
                'on',
            ],
            'id' => 'first',
        ]);
        $attributes['selected'] = $original_attributes['checked'];
        $attributes['id'] = $original_attributes['id'];
        $attributes = new Attribute($attributes);
        $this->assertSame(' checked class="who is on" id="first"', (string) $original_attributes, 'Original boolean value used with original name.');
        $this->assertSame(' selected id="first"', (string) $attributes, 'Original boolean value used with new name.');
    }

}