class FieldUIIndentationTest

class FieldUIIndentationTest extends BrowserTestBase {
  
  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = [
    'node',
    'field_ui',
    'field_ui_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create a test user.
    $admin_user = $this->drupalCreateUser([
      'access content',
      'administer content types',
      'administer node display',
    ]);
    $this->drupalLogin($admin_user);
    // Create Basic page node type.
    $this->drupalCreateContentType([
      'type' => 'page',
      'name' => 'Basic page',
    ]);
  }
  public function testIndentation() {
    $this->drupalGet('admin/structure/types/manage/page/display');
    $this->assertSession()
      ->responseContains('js-indentation indentation');
  }

}