public function FormValuesTest::testSimpleAjaxFormValue in Drupal 8

Same name and namespace in other branches

1. 9 core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php \Drupal\FunctionalJavascriptTests\Ajax\FormValuesTest::testSimpleAjaxFormValue()

Submits forms with select and checkbox elements via Ajax.

File

core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php, line 36

Class

FormValuesTest

Tests that form values are properly delivered to AJAX callbacks.

Namespace

Drupal\FunctionalJavascriptTests\Ajax

Code

public function testSimpleAjaxFormValue() {
  $this
    ->drupalGet('ajax_forms_test_get_form');
  $session = $this
    ->getSession();
  $assertSession = $this
    ->assertSession();

  // Verify form values of a select element.
  foreach ([
    'green',
    'blue',
    'red',
  ] as $item) {

    // Updating the field will trigger a AJAX request/response.
    $session
      ->getPage()
      ->selectFieldOption('select', $item);

    // The AJAX command in the response will update the DOM
    $select = $assertSession
      ->waitForElement('css', "div#ajax_selected_color:contains('{$item}')");
    $this
      ->assertNotNull($select, "DataCommand has updated the page with a value of {$item}.");
  }

  // Verify form values of a checkbox element.
  $session
    ->getPage()
    ->checkField('checkbox');
  $div0 = $this
    ->assertSession()
    ->waitForElement('css', "div#ajax_checkbox_value:contains('checked')");
  $this
    ->assertNotNull($div0, 'DataCommand updates the DOM as expected when a checkbox is selected');
  $session
    ->getPage()
    ->uncheckField('checkbox');
  $div1 = $this
    ->assertSession()
    ->waitForElement('css', "div#ajax_checkbox_value:contains('unchecked')");
  $this
    ->assertNotNull($div1, 'DataCommand updates the DOM as expected when a checkbox is de-selected');

  // Verify that AJAX elements with invalid callbacks return error code 500.
  // Ensure the test error log is empty before these tests.
  $this
    ->assertFileNotExists(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log');

  // We don't need to check for the X-Drupal-Ajax-Token header with these
  // invalid requests.
  $this->assertAjaxHeader = FALSE;
  foreach ([
    'null',
    'empty',
    'nonexistent',
  ] as $key) {
    $element_name = 'select_' . $key . '_callback';

    // Updating the field will trigger a AJAX request/response.
    $session
      ->getPage()
      ->selectFieldOption($element_name, 'green');

    // The select element is disabled as the AJAX request is issued.
    $this
      ->assertSession()
      ->waitForElement('css', "select[name=\"{$element_name}\"]:disabled");

    // The select element is enabled as the response is receieved.
    $this
      ->assertSession()
      ->waitForElement('css', "select[name=\"{$element_name}\"]:enabled");
    $this
      ->assertFileExists(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log');
    $this
      ->assertStringContainsString('"The specified #ajax callback is empty or not callable."', file_get_contents(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log'));

    // The exceptions are expected. Do not interpret them as a test failure.
    // Not using File API; a potential error must trigger a PHP warning.
    unlink(\Drupal::root() . '/' . $this->siteDirectory . '/error.log');
  }

  // We need to reload the page to kill any unfinished AJAX calls before
  // tearDown() is called.
  $this
    ->drupalGet('ajax_forms_test_get_form');
}