openFilterDialog example

public function testFilterCriteriaDialog() {
    // Checks that the admin summary is not double escaped.     $this->drupalGet('admin/structure/views/view/who_s_online');
    $page = $this->getSession()->getPage();
    $this->assertNotNull($page->findLink('User: Last access (>= -15 minutes)'));

    $this->drupalGet('admin/structure/views/view/content_recent');
    $assert_session = $this->assertSession();
    $session = $this->getSession();
    $page = $session->getPage();

    $this->openFilterDialog();

    // Add a new filter group.     $create_new_filter_group = $page->findById('views-add-group-link');
    $this->assertTrue($create_new_filter_group->isVisible(), 'Add group link found.');
    $create_new_filter_group->click();
    $assert_session->assertWaitOnAjaxRequest();

    // Assert the existence of the new filter group by checking the remove group     // link.     $remove_link = $page->findLink('Remove group');
    $this->assertTrue($remove_link->isVisible(), 'New group found.');