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);
    }

}