class DateTimeHandlerTestBase

abstract class DateTimeHandlerTestBase extends HandlerTestBase {
  
  /**
   * {@inheritdoc}
   */
  public static $modules = [
    'datetime_test',
    'node',
    'datetime',
  ];
  
  /**
   * Name of the field.
   *
   * Note, this is used in the default test view.
   *
   * @var string
   */
  protected static $field_name = 'field_date';
  
  /**
   * Nodes to test.
   *
   * @var \Drupal\node\NodeInterface[]
   */
  protected $nodes = [];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp($import_test_views = TRUE) {
    parent::setUp($import_test_views);
    // Add a date field to page nodes.
    $node_type = NodeType::create([
      'type' => 'page',
      'name' => 'page',
    ]);
    $node_type->save();
    $fieldStorage = FieldStorageConfig::create([
      'field_name' => static::$field_name,
      'entity_type' => 'node',
      'type' => 'datetime',
      'settings' => [
        'datetime_type' => DateTimeItem::DATETIME_TYPE_DATETIME,
      ],
    ]);
    $fieldStorage->save();
    $field = FieldConfig::create([
      'field_storage' => $fieldStorage,
      'bundle' => 'page',
      'required' => TRUE,
    ]);
    $field->save();
    // Views needs to be aware of the new field.
    $this->container
      ->get('views.views_data')
      ->clear();
    // Set column map.
    $this->map = [
      'nid' => 'nid',
    ];
    // Load test views.
    ViewTestData::createTestViews(get_class($this), [
      'datetime_test',
    ]);
  }

}