class CKEditor5ToolbarTest

class CKEditor5ToolbarTest extends CKEditor5TestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'toolbar',
  ];
  
  /**
   * The admin user.
   *
   * @var \Drupal\user\Entity\User
   */
  protected $user;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    FilterFormat::create([
      'format' => 'test_format',
      'name' => 'Test format',
      'filters' => [],
    ])->save();
    Editor::create([
      'editor' => 'ckeditor5',
      'format' => 'test_format',
      'settings' => [],
    ])->save();
    $this->assertSame([], array_map(function (ConstraintViolation $v) {
      return (string) $v->getMessage();
    }, iterator_to_array(CKEditor5::validatePair(Editor::load('test_format'), FilterFormat::load('test_format')))));
    $this->drupalCreateContentType([
      'type' => 'article',
      'name' => 'Article',
    ]);
    $this->user = $this->drupalCreateUser([
      'use text format test_format',
      'access toolbar',
      'edit any article content',
      'administer site configuration',
    ]);
    $this->drupalLogin($this->user);
  }
  
  /**
   * Ensures that CKEditor 5 toolbar renders below Drupal Toolbar.
   */
  public function test() : void {
    $assert_session = $this->assertSession();
    // Create test content to ensure that CKEditor 5 text editor can be
    // scrolled.
    $body = '';
    for ($i = 0; $i < 10; $i++) {
      $body .= '<p>' . $this->randomMachineName(32) . '</p>';
    }
    $edit_url = $this->drupalCreateNode([
      'type' => 'article',
      'body' => [
        'value' => $body,
        'format' => 'test_format',
      ],
    ])
      ->toUrl('edit-form');
    $this->drupalGet($edit_url);
    $this->assertNotEmpty($assert_session->waitForElement('css', '#toolbar-bar'));
    $this->assertNotEmpty($assert_session->waitForElement('css', '.ck-editor'));
    // Ensure the body has enough height to enable scrolling. Scroll 110px from
    // top of body field to ensure CKEditor 5 toolbar is sticky.
    $this->getSession()
      ->evaluateScript('document.body.style.height = "10000px";');
    $this->getSession()
      ->evaluateScript('location.hash = "#edit-body-0-value";');
    $this->getSession()
      ->evaluateScript('scroll(0, document.documentElement.scrollTop + 110);');
    // Focus CKEditor 5 text editor.
    $javascript = <<<JS
          Drupal.CKEditor5Instances.get(document.getElementById("edit-body-0-value").dataset["ckeditor5Id"]).editing.view.focus();
    JS;
    $this->getSession()
      ->evaluateScript($javascript);
    $this->assertNotEmpty($assert_session->waitForElementVisible('css', '.ck-sticky-panel__placeholder'));
    $toolbar_height = (int) $this->getSession()
      ->evaluateScript('document.getElementById("toolbar-bar").offsetHeight');
    $ckeditor5_toolbar_position = (int) $this->getSession()
      ->evaluateScript("document.querySelector('.ck-toolbar').getBoundingClientRect().top");
    $this->assertEqualsWithDelta($toolbar_height, $ckeditor5_toolbar_position, 2);
  }

}