function BubbleableMetadataTest::testMergeAttachmentsPageRegionMergingWithRecursiveRenderArrays

Tests page region attachment merging with recursive render arrays.

File

core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php, line 495

Class

BubbleableMetadataTest

Tests Drupal\Core\Render\BubbleableMetadata.

Namespace

Code

public function testMergeAttachmentsPageRegionMergingWithRecursiveRenderArrays() : void {
  $a = [
    'library' => [
      'core/drupal',
    ],
  ];
  $b = [
    'library' => [
      'core/jquery',
    ],
  ];
  foreach ([
    'page_top',
    'page_bottom',
  ] as $page_region) {
    $a[$page_region]['node_preview'] = [
      '#markup' => 'Preview from a',
    ];
    $a[$page_region]['node_preview']['#attached'][$page_region]['node_preview'] =& $a[$page_region]['node_preview'];
    $b[$page_region]['node_preview'] = [
      '#markup' => 'Preview from b',
    ];
    $b[$page_region]['node_preview']['#attached'][$page_region]['node_preview'] =& $b[$page_region]['node_preview'];
  }
  $merged = BubbleableMetadata::mergeAttachments($a, $b);
  $this->assertSame([
    'core/drupal',
    'core/jquery',
  ], $merged['library']);
  $this->assertSame('Preview from b', $merged['page_top']['node_preview']['#markup']);
  $this->assertSame('Preview from b', $merged['page_bottom']['node_preview']['#markup']);
}