public function testDigestHttpAuthSuccess()
 {
     // Skip Digest Access Authentication test on HHVM.
     // https://github.com/facebook/hhvm/issues/5201
     if (defined('HHVM_VERSION')) {
         return;
     }
     $username = '******';
     $password = '******';
     $invalid_password = '******';
     // Ensure that http digest returns canceled when not using any http digest authentication.
     $multi_curl = new MultiCurl();
     $multi_curl->setHeader('X-DEBUG-TEST', 'http_digest_auth');
     $get_1 = $multi_curl->addGet(Test::TEST_URL);
     $get_1->complete(function ($instance) {
         PHPUnit_Framework_Assert::assertEquals('canceled', $instance->response);
         PHPUnit_Framework_Assert::assertEquals(401, $instance->httpStatusCode);
     });
     $multi_curl->start();
     // Ensure that http digest returns invalid when using incorrect http digest authentication.
     $multi_curl = new MultiCurl();
     $multi_curl->setHeader('X-DEBUG-TEST', 'http_digest_auth');
     $multi_curl->setDigestAuthentication($username, $invalid_password);
     $this->assertEquals(CURLAUTH_DIGEST, $multi_curl->getOpt(CURLOPT_HTTPAUTH));
     $get_1 = $multi_curl->addGet(Test::TEST_URL);
     $get_1->complete(function ($instance) {
         PHPUnit_Framework_Assert::assertEquals(CURLAUTH_DIGEST, $instance->getOpt(CURLOPT_HTTPAUTH));
         PHPUnit_Framework_Assert::assertEquals('invalid', $instance->response);
         PHPUnit_Framework_Assert::assertEquals(401, $instance->httpStatusCode);
     });
     $multi_curl->start();
     // Ensure that http digest returns valid when using correct http digest authentication.
     $multi_curl = new MultiCurl();
     $multi_curl->setHeader('X-DEBUG-TEST', 'http_digest_auth');
     $multi_curl->setDigestAuthentication($username, $password);
     $this->assertEquals(CURLAUTH_DIGEST, $multi_curl->getOpt(CURLOPT_HTTPAUTH));
     $get_1 = $multi_curl->addGet(Test::TEST_URL);
     $get_1->complete(function ($instance) {
         PHPUnit_Framework_Assert::assertEquals(CURLAUTH_DIGEST, $instance->getOpt(CURLOPT_HTTPAUTH));
         PHPUnit_Framework_Assert::assertEquals('valid', $instance->response);
         PHPUnit_Framework_Assert::assertEquals(200, $instance->httpStatusCode);
     });
     $multi_curl->start();
     // Ensure that http digest can return both invalid and valid when using
     // incorrect and correct authentication in the same MultiCurl.
     $multi_curl = new MultiCurl();
     $multi_curl->setHeader('X-DEBUG-TEST', 'http_digest_auth');
     $multi_curl->setDigestAuthentication($username, $password);
     $this->assertEquals(CURLAUTH_DIGEST, $multi_curl->getOpt(CURLOPT_HTTPAUTH));
     $get_1 = $multi_curl->addGet(Test::TEST_URL);
     $get_1->beforeSend(function ($instance) use($username, $invalid_password) {
         $instance->setDigestAuthentication($username, $invalid_password);
         PHPUnit_Framework_Assert::assertEquals(CURLAUTH_DIGEST, $instance->getOpt(CURLOPT_HTTPAUTH));
     });
     $get_1->complete(function ($instance) {
         PHPUnit_Framework_Assert::assertEquals(CURLAUTH_DIGEST, $instance->getOpt(CURLOPT_HTTPAUTH));
         PHPUnit_Framework_Assert::assertEquals('invalid', $instance->response);
         PHPUnit_Framework_Assert::assertEquals(401, $instance->httpStatusCode);
     });
     $get_2 = $multi_curl->addGet(Test::TEST_URL);
     $get_2->complete(function ($instance) {
         PHPUnit_Framework_Assert::assertEquals(CURLAUTH_DIGEST, $instance->getOpt(CURLOPT_HTTPAUTH));
         PHPUnit_Framework_Assert::assertEquals('valid', $instance->response);
         PHPUnit_Framework_Assert::assertEquals(200, $instance->httpStatusCode);
     });
     $multi_curl->start();
 }