class TrustedRedirectResponseTest

class TrustedRedirectResponseTest extends UnitTestCase {
  
  /**
   * @covers ::setTargetUrl
   */
  public function testSetTargetUrlWithInternalUrl() : void {
    $redirect_response = new TrustedRedirectResponse('/example');
    $redirect_response->setTargetUrl('/example2');
    $this->assertEquals('/example2', $redirect_response->getTargetUrl());
  }
  
  /**
   * @covers ::setTargetUrl
   */
  public function testSetTargetUrlWithUntrustedUrl() : void {
    $request_context = new RequestContext();
    $request_context->setCompleteBaseUrl('https://www.drupal.org');
    $container = new ContainerBuilder();
    $container->set('router.request_context', $request_context);
    \Drupal::setContainer($container);
    $redirect_response = new TrustedRedirectResponse('/example');
    $this->expectException(\InvalidArgumentException::class);
    $redirect_response->setTargetUrl('http://evil-url.com/example');
  }
  
  /**
   * @covers ::setTargetUrl
   */
  public function testSetTargetUrlWithTrustedUrl() : void {
    $redirect_response = new TrustedRedirectResponse('/example');
    $redirect_response->setTrustedTargetUrl('http://good-external-url.com/example');
    $this->assertEquals('http://good-external-url.com/example', $redirect_response->getTargetUrl());
  }
  
  /**
   * @covers ::createFromRedirectResponse
   * @dataProvider providerCreateFromRedirectResponse
   */
  public function testCreateFromRedirectResponse($redirect_response) : void {
    $trusted_redirect_response = TrustedRedirectResponse::createFromRedirectResponse($redirect_response);
    // The trusted redirect response is always a CacheableResponseInterface
    // instance.
    $this->assertInstanceOf(CacheableResponseInterface::class, $trusted_redirect_response);
    // But it is only actually cacheable (non-zero max-age) if the redirect
    // response passed to TrustedRedirectResponse::createFromRedirectResponse()
    // is itself cacheable.
    $expected_cacheability = $redirect_response instanceof CacheableResponseInterface ? $redirect_response->getCacheableMetadata() : (new CacheableMetadata())->setCacheMaxAge(0);
    $this->assertEquals($expected_cacheability, $trusted_redirect_response->getCacheableMetadata());
  }
  
  /**
   * @return array
   *   An array of test cases, each containing a redirect response instance.
   */
  public static function providerCreateFromRedirectResponse() {
    return [
      'cacheable-with-tags' => [
        (new CacheableRedirectResponse('/example'))->addCacheableDependency((new CacheableMetadata())->addCacheTags([
          'foo',
        ])),
      ],
      'cacheable-with-max-age-0' => [
        (new CacheableRedirectResponse('/example'))->addCacheableDependency((new CacheableMetadata())->setCacheMaxAge(0)),
      ],
      'uncacheable' => [
        new RedirectResponse('/example'),
      ],
    ];
  }

}