class ManageFieldsTest

class ManageFieldsTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'field_ui',
    'field_ui_test',
    'node',
    'text',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $account = $this->drupalCreateUser([
      'administer node fields',
    ]);
    $this->drupalLogin($account);
    $this->config('system.logging')
      ->set('error_level', ERROR_REPORTING_DISPLAY_ALL)
      ->save();
  }
  public function testFieldDropButtonOperations() {
    $node_type = $this->drupalCreateContentType();
    /** @var \Drupal\field\FieldStorageConfigInterface $storage */
    $storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('field_storage_config')
      ->create([
      'type' => 'string',
      'field_name' => 'highlander',
      'entity_type' => 'node',
    ]);
    $storage->save();
    $this->container
      ->get('entity_type.manager')
      ->getStorage('field_config')
      ->create([
      'field_storage' => $storage,
      'bundle' => $node_type->id(),
    ])
      ->save();
    $this->drupalGet('/admin/structure/types/manage/' . $node_type->id() . '/fields');
  }

}