Method querySelectorOrElement

testing/helpers/service.js:253–257

* Helper to support providing already-selected elements to methods. * @param {string|Element} selectorOrElement * @return {Element}

(selectorOrElement)

   * @return {Element}
   */
  querySelectorOrElement(selectorOrElement) {
    return typeof selectorOrElement == 'string'
      ? this.rootNode_.querySelector(selectorOrElement)
      : selectorOrElement;
  }

  /**
   * Helper to support providing already-selected elements to methods.