ViewsFormTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\views\Functional\Plugin;

use Drupal\Tests\views\Functional\ViewTestBase;

/**
 * Tests Views forms functionality.
 *
 * @group views
 */
class ViewsFormTest extends ViewTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'action_bulk_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests the Views form wrapper.
   */
  public function testFormWrapper() : void {
    $this->drupalGet('test_bulk_form');
    // Ensure we have the form tag on the page.
    $xpath = $this->cssSelect('.views-form form');
    $this->assertCount(1, $xpath, 'There is one views form on the page.');
    // Ensure we don't have nested form elements.
    $result = (bool) preg_match('#<form[^>]*?>(?!/form).*<form#s', $this->getSession()
      ->getPage()
      ->getContent());
    $this->assertFalse($result, 'The views form element is not nested.');
    // Test the form isn't shown when the display doesn't use fields.
    $this->drupalGet('display-without-fields');
    // Ensure there's no form.
    $xpath = $this->cssSelect('.views-form form');
    $this->assertCount(0, $xpath);
  }

}