BubbleableMetadataTest.php

<?php

namespace Drupal\Tests\aggregator\Unit;

use Drupal\Core\Render\BubbleableMetadata;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Render\BubbleableMetadata
 * @group aggregator
 * @group legacy
 */
class BubbleableMetadataTest extends UnitTestCase {
    
    /**
     * Tests feed asset merging.
     *
     * @covers ::mergeAttachments
     *
     * @dataProvider providerTestMergeAttachmentsFeedMerging
     */
    public function testMergeAttachmentsFeedMerging($a, $b, $expected) {
        $this->assertSame($expected, BubbleableMetadata::mergeAttachments($a, $b));
    }
    
    /**
     * Data provider for testMergeAttachmentsFeedMerging.
     *
     * @return array
     */
    public function providerTestMergeAttachmentsFeedMerging() {
        $feed_a = [
            'aggregator/rss',
            'Feed title',
        ];
        $feed_b = [
            'taxonomy/term/1/feed',
            'RSS - foo',
        ];
        $a = [
            'feed' => [
                $feed_a,
            ],
        ];
        $b = [
            'feed' => [
                $feed_b,
            ],
        ];
        $expected_a = [
            'feed' => [
                $feed_a,
                $feed_b,
            ],
        ];
        // Merging in the opposite direction yields the opposite library order.
        $expected_b = [
            'feed' => [
                $feed_b,
                $feed_a,
            ],
        ];
        return [
            [
                $a,
                $b,
                $expected_a,
            ],
            [
                $b,
                $a,
                $expected_b,
            ],
        ];
    }

}