class DenyNodePreviewTest

class DenyNodePreviewTest extends UnitTestCase {
  
  /**
   * The response policy under test.
   *
   * @var \Drupal\node\PageCache\DenyNodePreview
   */
  protected $policy;
  
  /**
   * A request object.
   *
   * @var \Symfony\Component\HttpFoundation\Request
   */
  protected $request;
  
  /**
   * A response object.
   *
   * @var \Symfony\Component\HttpFoundation\Response
   */
  protected $response;
  
  /**
   * The current route match.
   *
   * @var \Drupal\Core\Routing\RouteMatch|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $routeMatch;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    $this->routeMatch = $this->createMock('Drupal\\Core\\Routing\\RouteMatchInterface');
    $this->policy = new DenyNodePreview($this->routeMatch);
    $this->response = new Response();
    $this->request = new Request();
  }
  
  /**
   * Asserts that caching is denied on the node preview route.
   *
   * @dataProvider providerPrivateImageStyleDownloadPolicy
   * @covers ::check
   */
  public function testPrivateImageStyleDownloadPolicy($expected_result, $route_name) {
    $this->routeMatch
      ->expects($this->once())
      ->method('getRouteName')
      ->willReturn($route_name);
    $actual_result = $this->policy
      ->check($this->response, $this->request);
    $this->assertSame($expected_result, $actual_result);
  }
  
  /**
   * Provides data and expected results for the test method.
   *
   * @return array
   *   Data and expected results.
   */
  public function providerPrivateImageStyleDownloadPolicy() {
    return [
      [
        ResponsePolicyInterface::DENY,
        'entity.node.preview',
      ],
      [
        NULL,
        'some.other.route',
      ],
      [
        NULL,
        NULL,
      ],
      [
        NULL,
        FALSE,
      ],
      [
        NULL,
        TRUE,
      ],
      [
        NULL,
        new \StdClass(),
      ],
      [
        NULL,
        [
          1,
          2,
          3,
        ],
      ],
    ];
  }

}