assertSourceAttributeSame example

// Confirm data-foo is present in the drupal-media preview.     $this->assertNotEmpty($upcasted_media = $assert_session->waitForElementVisible('css', '.ck-widget.drupal-media'));
    $this->assertFalse($upcasted_media->hasAttribute('data-foo'));
    $this->assertNotEmpty($preview = $assert_session->waitForElementVisible('css', '.ck-widget.drupal-media > [data-drupal-media-preview="ready"] > .media', 30000));
    $this->assertEquals('bar', $preview->getAttribute('data-foo'));

    // Confirm that the media is wrapped by the div on the editing view.     $assert_session->elementExists('css', 'div[data-bar="baz"] > .drupal-media');

    // Confirm data-foo is not stripped from source.     $this->assertSourceAttributeSame('data-foo', 'bar');

    // Confirm that drupal-media is wrapped by the div.     $editor_dom = new \DOMXPath($this->getEditorDataAsDom());
    $this->assertNotEmpty($editor_dom->query('//div[@data-bar="baz"]/drupal-media'));
  }

  /** * Ensures arbitrary attributes can be added on links wrapping media via GHS. * * @dataProvider providerLinkability */