class SessionTest

class SessionTest extends WebDriverTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'menu_link_content',
    'block',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $account = $this->drupalCreateUser();
    $this->drupalLogin($account);
    $menu_link_content = MenuLinkContent::create([
      'title' => 'Link to front page',
      'menu_name' => 'tools',
      'link' => [
        'uri' => 'route:<front>',
      ],
    ]);
    $menu_link_content->save();
    $this->drupalPlaceBlock('system_menu_block:tools');
  }
  
  /**
   * Tests that the session doesn't expire.
   *
   * Makes sure that drupal_valid_test_ua() works for multiple requests
   * performed by the Mink browser. The SIMPLETEST_USER_AGENT cookie must always
   * be valid.
   */
  public function testSessionExpiration() {
    // Visit the front page and click the link back to the front page a large
    // number of times.
    $this->drupalGet('<front>');
    $page = $this->getSession()
      ->getPage();
    for ($i = 0; $i < 25; $i++) {
      $page->clickLink('Link to front page');
    }
  }

}