* @todo change $edit to disallow NULL as a value for Drupal 9.
* https://www.drupal.org/node/2802401
* @param string $submit
- * Value of the submit button whose click is to be emulated. For example,
- * 'Save'. The processing of the request depends on this value. For example,
- * a form may have one button with the value 'Save' and another button with
- * the value 'Delete', and execute different code depending on which one is
- * clicked.
- *
- * This function can also be called to emulate an Ajax submission. In this
- * case, this value needs to be an array with the following keys:
- * - path: A path to submit the form values to for Ajax-specific processing.
- * - triggering_element: If the value for the 'path' key is a generic Ajax
- * processing path, this needs to be set to the name of the element. If
- * the name doesn't identify the element uniquely, then this should
- * instead be an array with a single key/value pair, corresponding to the
- * element name and value. The \Drupal\Core\Form\FormAjaxResponseBuilder
- * uses this to find the #ajax information for the element, including
- * which specific callback to use for processing the request.
- *
- * This can also be set to NULL in order to emulate an Internet Explorer
- * submission of a form with a single text field, and pressing ENTER in that
- * textfield: under these conditions, no button information is added to the
- * POST data.
+ * The id, name, label or value of the submit button which is to be clicked.
+ * For example, 'Save'. The first element matched by
+ * \Drupal\Tests\WebAssert::buttonExists() will be used. The processing of
+ * the request depends on this value. For example, a form may have one
+ * button with the value 'Save' and another button with the value 'Delete',
+ * and execute different code depending on which one is clicked.
* @param array $options
* Options to be forwarded to the url generator.
* @param string|null $form_html_id
* (deprecated) The response content after submit form. It is necessary for
* backwards compatibility and will be removed before Drupal 9.0. You should
* just use the webAssert object for your assertions.
+ *
+ * @see \Drupal\Tests\WebAssert::buttonExists()
*/
protected function drupalPostForm($path, $edit, $submit, array $options = [], $form_html_id = NULL) {
if (is_object($submit)) {