Issue #3103240 by oknate, smustgrave, quietone, jungle: MultiFormTest not executing

    // page update, ensure the same as above.

    for ($i = 0; $i < 2; $i++) {

      $forms = $page->find('xpath', $form_xpath);

      $forms = $page->findAll('xpath', $form_xpath);

      foreach ($forms as $offset => $form) {

        $button = $form->findButton('Add another item');

        $this->assertNotNull($button, 'Add Another Item button exists');

        $button->press();

        // Wait for page update.

        $this->assertSession()->assertWaitOnAjaxRequest();

        // Wait for field to be added with ajax.

        $this->assertNotEmpty($page->waitFor(10, function () use ($form, $i) {

          return $form->findField('field_ajax_test[' . ($i + 1) . '][value]');

        }));

        // After AJAX request and response page will update.

        $page_updated = $session->getPage();

        $field = $page_updated->findAll('xpath', '.' . $field_xpath);

        $this->assertCount($i + 2, $field[0]->find('xpath', '.' . $field_items_xpath_suffix), 'Found the correct number of field items after an AJAX submission.');

        $this->assertNotNull($field[0]->find('xpath', '.' . $button_xpath_suffix), 'Found the "add more" button after an AJAX submission.');

        // After AJAX request and response verify the correct number of text

        // fields (including title), as well as the "Add another item" button.

        $this->assertCount($i + 3, $form->findAll('css', 'input[type="text"]'), 'Found the correct number of field items after an AJAX submission.');

        $this->assertNotEmpty($form->findButton('Add another item'), 'Found the "add more" button after an AJAX submission.');

        $this->assertSession()->pageContainsNoDuplicateId();

      }

    }