AjaxMaintenanceModeTest.php

<?php

declare (strict_types=1);
namespace Drupal\FunctionalJavascriptTests\Ajax;

use Drupal\FunctionalJavascriptTests\WebDriverTestBase;
use Drupal\Tests\field_ui\Traits\FieldUiTestTrait;
use Drupal\Tests\file\Functional\FileFieldCreationTrait;
use Drupal\Tests\TestFileCreationTrait;

/**
 * Tests maintenance message during an AJAX call.
 *
 * @group Ajax
 */
class AjaxMaintenanceModeTest extends WebDriverTestBase {
  use FieldUiTestTrait;
  use FileFieldCreationTrait;
  use TestFileCreationTrait;

  /**
   * An user with administration permissions.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $adminUser;

  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'ajax_test',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->adminUser = $this
      ->drupalCreateUser([
      'access administration pages',
      'administer site configuration',
      'access site in maintenance mode',
    ]);
    $this
      ->drupalLogin($this->adminUser);
  }

  /**
   * Tests maintenance message only appears once on an AJAX call.
   */
  public function testAjaxCallMaintenanceMode() : void {
    $page = $this
      ->getSession()
      ->getPage();
    $assert_session = $this
      ->assertSession();
    \Drupal::state()
      ->set('system.maintenance_mode', TRUE);
    $this
      ->drupalGet('ajax-test/insert-inline-wrapper');
    $assert_session
      ->pageTextContains('Target inline');
    $page
      ->clickLink('Link html pre-wrapped-div');
    $this
      ->assertSession()
      ->assertWaitOnAjaxRequest();
    $this
      ->assertSession()
      ->pageTextContainsOnce('Operating in maintenance mode');
  }

}