Widevine encryptor source unittest

Change-Id: I1b56d0a019480472eb462d8a39f81c4eb3c81a0e

media/base/http_fetcher.cc

@@ -4,7 +4,7 @@
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 
-#include "media/base/httpfetcher.h"
+#include "media/base/http_fetcher.h"
 
 #ifdef WIN32
 #include <winsock2.h>
@@ -16,7 +16,7 @@
 
 namespace {
 
-struct HTTPResult {
+struct HttpResult {
   int status_code;
   std::string status_message;
   std::string response;
@@ -74,7 +74,7 @@ void OnBegin(const happyhttp::Response* response, void* userdata) {
   DLOG(INFO) << "BEGIN (" << response->getstatus() << ", "
              << response->getreason() << ").";
 
-  HTTPResult* result = static_cast<HTTPResult*>(userdata);
+  HttpResult* result = static_cast<HttpResult*>(userdata);
   result->status_code = response->getstatus();
   result->status_message = response->getreason();
   result->response.clear();
@@ -85,13 +85,13 @@ void OnData(const happyhttp::Response* response,
             const unsigned char* data,
             int num_bytes) {
   DCHECK(response && userdata && data);
-  HTTPResult* result = static_cast<HTTPResult*>(userdata);
+  HttpResult* result = static_cast<HttpResult*>(userdata);
   result->response.append(reinterpret_cast<const char*>(data), num_bytes);
 }
 
 void OnComplete(const happyhttp::Response* response, void* userdata) {
   DCHECK(response && userdata);
-  HTTPResult* result = static_cast<HTTPResult*>(userdata);
+  HttpResult* result = static_cast<HttpResult*>(userdata);
   DLOG(INFO) << "COMPLETE (" << result->response.size() << " bytes).";
 }
 
@@ -101,7 +101,10 @@ const int kHttpOK = 200;
 
 namespace media {
 
-HTTPFetcher::HTTPFetcher() {
+HttpFetcher::HttpFetcher() {}
+HttpFetcher::~HttpFetcher() {}
+
+SimpleHttpFetcher::SimpleHttpFetcher() {
 #ifdef WIN32
   WSAData wsa_data;
   int code = WSAStartup(MAKEWORD(1, 1), &wsa_data);
@@ -111,26 +114,27 @@ HTTPFetcher::HTTPFetcher() {
 #endif  // WIN32
 }
 
-HTTPFetcher::~HTTPFetcher() {
+SimpleHttpFetcher::~SimpleHttpFetcher() {
 #ifdef WIN32
   if (wsa_startup_succeeded_)
     WSACleanup();
 #endif  // WIN32
 }
 
-Status HTTPFetcher::Get(const std::string& path, std::string* response) {
+Status SimpleHttpFetcher::Get(const std::string& path, std::string* response) {
   return FetchInternal("GET", path, "", response);
 }
 
-Status HTTPFetcher::Post(const std::string& path, const std::string& data,
+Status SimpleHttpFetcher::Post(const std::string& path,
-                         std::string* response) {
+                               const std::string& data,
+                               std::string* response) {
   return FetchInternal("POST", path, data, response);
 }
 
-Status HTTPFetcher::FetchInternal(const std::string& method,
+Status SimpleHttpFetcher::FetchInternal(const std::string& method,
-                                  const std::string& url,
+                                        const std::string& url,
-                                  const std::string& data,
+                                        const std::string& data,
-                                  std::string* response) {
+                                        std::string* response) {
   DCHECK(response);
 
   int status_code = 0;
@@ -145,7 +149,7 @@ Status HTTPFetcher::FetchInternal(const std::string& method,
   }
 
   try {
-    HTTPResult result;
+    HttpResult result;
     happyhttp::Connection connection(host.data(), port);
     connection.setcallbacks(OnBegin, OnData, OnComplete, &result);
 

media/base/http_fetcher.h

@@ -4,32 +4,49 @@
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 
-#ifndef MEDIA_BASE_HTTPFETCHER_H_
+#ifndef MEDIA_BASE_HTTP_FETCHER_H_
-#define MEDIA_BASE_HTTPFETCHER_H_
+#define MEDIA_BASE_HTTP_FETCHER_H_
 
+#include "base/compiler_specific.h"
 #include "media/base/status.h"
 
 namespace media {
 
-// A simple HTTP fetcher implementation using happyhttp.
+class HttpFetcher {
-class HTTPFetcher {
  public:
-  // TODO(kqyang): Add timeout support.
+  HttpFetcher();
-  HTTPFetcher();
+  virtual ~HttpFetcher();
-  ~HTTPFetcher();
 
   // Fetch |response| from |url| using HTTP GET.
   // |response| should not be NULL, will contain the body of the http response
   // on success.
   // Return OK on success.
-  Status Get(const std::string& url, std::string* response);
+  virtual Status Get(const std::string& url, std::string* response) = 0;
 
   // Fetch |response| from |url| using HTTP POST.
   // |response| should not be NULL, will contain the body of the http response
   // on success.
   // Return OK on success.
-  Status Post(const std::string& url, const std::string& data,
+  virtual Status Post(const std::string& url,
-              std::string* response);
+                      const std::string& data,
+                      std::string* response) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HttpFetcher);
+};
+
+// A simple HttpFetcher implementation using happyhttp.
+class SimpleHttpFetcher : public HttpFetcher {
+ public:
+  // TODO(kqyang): Add timeout support.
+  SimpleHttpFetcher();
+  virtual ~SimpleHttpFetcher();
+
+  // HttpFetcher implementation overrides.
+  virtual Status Get(const std::string& url, std::string* response) OVERRIDE;
+  virtual Status Post(const std::string& url,
+                      const std::string& data,
+                      std::string* response) OVERRIDE;
 
  private:
   // Internal implementation of HTTP functions, e.g. Get and Post.
@@ -41,10 +58,10 @@ class HTTPFetcher {
   bool wsa_startup_succeeded_;
 #endif
 
-  DISALLOW_COPY_AND_ASSIGN(HTTPFetcher);
+  DISALLOW_COPY_AND_ASSIGN(SimpleHttpFetcher);
 };
 
 }  // namespace media
 
-#endif  // MEDIA_BASE_HTTPFETCHER_H_
+#endif  // MEDIA_BASE_HTTP_FETCHER_H_
 

media/base/http_fetcher_unittest.cc

@@ -4,7 +4,7 @@
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 
-#include "media/base/httpfetcher.h"
+#include "media/base/http_fetcher.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ -30,7 +30,7 @@ namespace media {
 
 static void CheckHttpGet(const std::string& url,
                          const std::string& expected_response) {
-  HTTPFetcher fetcher;
+  SimpleHttpFetcher fetcher;
   std::string response;
   ASSERT_OK(fetcher.Get(url, &response));
   base::RemoveChars(response, "\r\n\t ", &response);
@@ -39,7 +39,7 @@ static void CheckHttpGet(const std::string& url,
 
 static void CheckHttpPost(const std::string& url, const std::string& data,
                           const std::string& expected_response) {
-  HTTPFetcher fetcher;
+  SimpleHttpFetcher fetcher;
   std::string response;
   ASSERT_OK(fetcher.Post(url, data, &response));
   base::RemoveChars(response, "\r\n\t ", &response);
@@ -47,16 +47,16 @@ static void CheckHttpPost(const std::string& url, const std::string& data,
 }
 
 
-TEST(HTTPFetcherTest, HttpGet) {
+TEST(HttpFetcherTest, HttpGet) {
   CheckHttpGet(kTestUrl, kExpectedGetResponse);
 }
 
-TEST(HTTPFetcherTest, HttpPost) {
+TEST(HttpFetcherTest, HttpPost) {
   CheckHttpPost(kTestUrl, kPostData, kExpectedPostResponse);
 }
 
-TEST(HTTPFetcherTest, InvalidUrl) {
+TEST(HttpFetcherTest, InvalidUrl) {
-  HTTPFetcher fetcher;
+  SimpleHttpFetcher fetcher;
   std::string response;
   const std::string invalid_url(kTestUrl, sizeof(kTestUrl) - 2);
   Status status = fetcher.Get(invalid_url, &response);
@@ -65,7 +65,7 @@ TEST(HTTPFetcherTest, InvalidUrl) {
       EndsWith(status.error_message(), base::IntToString(kHttpNotFound), true));
 }
 
-TEST(HTTPFetcherTest, UrlWithPort) {
+TEST(HttpFetcherTest, UrlWithPort) {
   CheckHttpGet(kTestUrlWithPort, kExpectedGetResponse);
 }
 

media/base/media_base.gyp

@@ -23,11 +23,11 @@
       ],
     },
     {
-      'target_name': 'httpfetcher',
+      'target_name': 'http_fetcher',
       'type': '<(component)',
       'sources': [
-        'httpfetcher.cc',
+        'http_fetcher.cc',
-        'httpfetcher.h',
+        'http_fetcher.h',
       ],
       'cflags!': [ '-fno-exceptions' ],
       'cflags_cc!': [ '-fno-exceptions' ],
@@ -45,16 +45,16 @@
     },
     {
       # Note that this test performs real http requests to a http server.
-      'target_name': 'httpfetcher_unittest',
+      'target_name': 'http_fetcher_unittest',
       'type': '<(gtest_target_type)',
       'sources': [
-        'httpfetcher_unittest.cc',
+        'http_fetcher_unittest.cc',
       ],
       'dependencies': [
         '../../base/base.gyp:base',
         '../../testing/gtest.gyp:gtest',
         '../../testing/gtest.gyp:gtest_main',
-        'httpfetcher',
+        'http_fetcher',
       ],
     },
     {
@@ -110,7 +110,7 @@
       'dependencies': [
         '../../base/base.gyp:base',
         '../../third_party/openssl/openssl.gyp:openssl',
-        'httpfetcher',
+        'http_fetcher',
         'status',
       ],
     },
@@ -130,6 +130,7 @@
         'status_test_util.h',
         'status_test_util_unittest.cc',
         'status_unittest.cc',
+        'widevine_encryptor_source_unittest.cc',
       ],
       'dependencies': [
         '../../testing/gtest.gyp:gtest',

media/base/widevine_encryptor_source.cc

@@ -12,7 +12,7 @@
 #include "base/time/time.h"
 #include "base/threading/platform_thread.h"
 #include "base/values.h"
-#include "media/base/httpfetcher.h"
+#include "media/base/http_fetcher.h"
 #include "media/base/request_signer.h"
 
 // TODO(kqyang): Move media/mp4/rcheck.h to media/base/.
@@ -102,7 +102,8 @@ WidevineEncryptorSource::WidevineEncryptorSource(
     const std::string& content_id,
     TrackType track_type,
     scoped_ptr<RequestSigner> signer)
-    : server_url_(server_url),
+    : http_fetcher_(new SimpleHttpFetcher()),
+      server_url_(server_url),
       content_id_(content_id),
       track_type_(track_type),
       signer_(signer.Pass()) {
@@ -120,14 +121,13 @@ Status WidevineEncryptorSource::Initialize() {
     return status;
   VLOG(1) << "Message: " << message;
 
-  HTTPFetcher fetcher;
   std::string raw_response;
   int64 sleep_duration = kFirstRetryDelayMilliseconds;
 
   // Perform client side retries if seeing server transient error to workaround
   // server limitation.
   for (int i = 0; i < kNumTransientErrorRetries; ++i) {
-    status = fetcher.Post(server_url_, message, &raw_response);
+    status = http_fetcher_->Post(server_url_, message, &raw_response);
     if (!status.ok())
       return status;
     VLOG(1) << "Retry [" << i << "] Response:" << raw_response;
@@ -172,6 +172,11 @@ WidevineEncryptorSource::GetTrackTypeFromString(
   return TRACK_TYPE_UNKNOWN;
 }
 
+void WidevineEncryptorSource::set_http_fetcher(
+    scoped_ptr<HttpFetcher> http_fetcher) {
+  http_fetcher_ = http_fetcher.Pass();
+}
+
 void WidevineEncryptorSource::FillRequest(const std::string& content_id,
                                           std::string* request) {
   DCHECK(request);
@@ -256,9 +261,8 @@ bool WidevineEncryptorSource::IsExpectedTrackType(
   return track_type_ == GetTrackTypeFromString(track_type_string);
 }
 
-bool WidevineEncryptorSource::ExtractEncryptionKey(
+bool WidevineEncryptorSource::ExtractEncryptionKey(const std::string& response,
-    const std::string& response,
+                                                   bool* transient_error) {
-    bool* transient_error) {
   DCHECK(transient_error);
   *transient_error = false;
 

media/base/widevine_encryptor_source.h

@@ -8,10 +8,12 @@
 #define MEDIA_BASE_WIDEVINE_ENCRYPTOR_SOURCE_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "media/base/encryptor_source.h"
 
 namespace media {
 
+class HttpFetcher;
 class RequestSigner;
 
 // Defines an encryptor source which talks to Widevine encryption server.
@@ -37,6 +39,8 @@ class WidevineEncryptorSource : public EncryptorSource {
   static WidevineEncryptorSource::TrackType GetTrackTypeFromString(
       const std::string& track_type_string);
 
+  void set_http_fetcher(scoped_ptr<HttpFetcher> http_fetcher);
+
  private:
   // Fill |request| with necessary fields for Widevine encryption request.
   // |request| should not be NULL.
@@ -55,6 +59,10 @@ class WidevineEncryptorSource : public EncryptorSource {
   bool ExtractEncryptionKey(const std::string& response,
                             bool* transient_error);
 
+  // The fetcher object used to fetch HTTP response from server.
+  // It is initialized to a default fetcher on class initialization.
+  // Can be overridden using set_http_fetcher for testing or other purposes.
+  scoped_ptr<HttpFetcher> http_fetcher_;
   std::string server_url_;
   std::string content_id_;
   TrackType track_type_;

media/base/widevine_encryptor_source_unittest.cc

@@ -0,0 +1,232 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#include "media/base/widevine_encryptor_source.h"
+
+#include "base/base64.h"
+#include "base/strings/stringprintf.h"
+#include "media/base/http_fetcher.h"
+#include "media/base/request_signer.h"
+#include "media/base/status_test_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+const char kServerUrl[] = "http://www.foo.com/getcontentkey";
+const char kContentId[] = "ContentFoo";
+const char kTrackType[] = "SD";
+const char kSignerName[] = "SignerFoo";
+
+const char kMockSignature[] = "MockSignature";
+
+const char kMockKeyId[] = "MockKeyId";
+const char kMockKey[] = "MockKey";
+const char kMockPsshData[] = "MockPsshData";
+
+// The lisence service may return an error indicating a transient error has
+// just happened in the server, or other types of errors.
+// WidevineEncryptorSource will perform a number of retries on transient errors;
+// WidevineEncryptorSource does not know about other errors and retries are not
+// performed.
+const char kLicenseStatusTransientError[] = "INTERNAL_ERROR";
+const char kLicenseStatusUnknownError[] = "UNKNOWN_ERROR";
+
+const char kExpectedRequestMessageFormat[] =
+    "{\"content_id\":\"%s\",\"drm_types\":[\"WIDEVINE\"],\"policy\":\"\","
+    "\"tracks\":[{\"type\":\"SD\"},{\"type\":\"HD\"},{\"type\":\"AUDIO\"}]}";
+const char kExpectedSignedMessageFormat[] =
+    "{\"request\":\"%s\",\"signature\":\"%s\",\"signer\":\"%s\"}";
+const char kLicenseOkResponseFormat[] =
+    "{\"status\":\"OK\",\"tracks\":[{\"type\":\"%s\",\"key_id\":\"%s\",\"key\":"
+    "\"%s\",\"pssh\":[{\"drm_type\":\"WIDEVINE\",\"data\":\"%s\"}]}]}";
+const char kLicenseErrorResponseFormat[] =
+    "{\"status\":\"%s\",\"drm\":[],\"tracks\":[]}";
+const char kHttpResponseFormat[] = "{\"response\":\"%s\"}";
+
+std::string Base64Encode(const std::string& input) {
+  std::string output;
+  base::Base64Encode(input, &output);
+  return output;
+}
+
+std::string ToString(const std::vector<uint8> v) {
+  return std::string(v.begin(), v.end());
+}
+}  // namespace
+
+using ::testing::_;
+using ::testing::DoAll;
+using ::testing::Return;
+using ::testing::SetArgPointee;
+
+namespace media {
+
+class MockRequestSigner : public RequestSigner {
+ public:
+  explicit MockRequestSigner(const std::string& signer_name)
+      : RequestSigner(signer_name) {}
+  virtual ~MockRequestSigner() {}
+
+  MOCK_METHOD2(GenerateSignature,
+               bool(const std::string& message, std::string* signature));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockRequestSigner);
+};
+
+class MockHttpFetcher : public HttpFetcher {
+ public:
+  MockHttpFetcher() : HttpFetcher() {}
+  virtual ~MockHttpFetcher() {}
+
+  MOCK_METHOD2(Get, Status(const std::string& url, std::string* response));
+  MOCK_METHOD3(Post,
+               Status(const std::string& url,
+                      const std::string& data,
+                      std::string* response));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockHttpFetcher);
+};
+
+class WidevineEncryptorSourceTest : public ::testing::Test {
+ public:
+  WidevineEncryptorSourceTest()
+      : mock_request_signer_(new MockRequestSigner(kSignerName)),
+        mock_http_fetcher_(new MockHttpFetcher()) {}
+
+ protected:
+  void CreateWidevineEncryptorSource() {
+    widevine_encryptor_source_.reset(new WidevineEncryptorSource(
+        kServerUrl,
+        kContentId,
+        WidevineEncryptorSource::GetTrackTypeFromString(kTrackType),
+        mock_request_signer_.PassAs<RequestSigner>()));
+    widevine_encryptor_source_->set_http_fetcher(
+        mock_http_fetcher_.PassAs<HttpFetcher>());
+  }
+
+  scoped_ptr<MockRequestSigner> mock_request_signer_;
+  scoped_ptr<MockHttpFetcher> mock_http_fetcher_;
+  scoped_ptr<WidevineEncryptorSource> widevine_encryptor_source_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WidevineEncryptorSourceTest);
+};
+
+TEST_F(WidevineEncryptorSourceTest, GetTrackTypeFromString) {
+  EXPECT_EQ(WidevineEncryptorSource::TRACK_TYPE_SD,
+            WidevineEncryptorSource::GetTrackTypeFromString("SD"));
+  EXPECT_EQ(WidevineEncryptorSource::TRACK_TYPE_HD,
+            WidevineEncryptorSource::GetTrackTypeFromString("HD"));
+  EXPECT_EQ(WidevineEncryptorSource::TRACK_TYPE_AUDIO,
+            WidevineEncryptorSource::GetTrackTypeFromString("AUDIO"));
+  EXPECT_EQ(WidevineEncryptorSource::TRACK_TYPE_UNKNOWN,
+            WidevineEncryptorSource::GetTrackTypeFromString("FOO"));
+}
+
+TEST_F(WidevineEncryptorSourceTest, GeneratureSignatureFailure) {
+  EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
+      .WillOnce(Return(false));
+
+  CreateWidevineEncryptorSource();
+  ASSERT_EQ(Status(error::INTERNAL_ERROR, "Signature generation failed."),
+            widevine_encryptor_source_->Initialize());
+}
+
+// Check whether expected request message and post data was generated and
+// verify the correct behavior on http failure.
+TEST_F(WidevineEncryptorSourceTest, HttpPostFailure) {
+  std::string expected_message = base::StringPrintf(
+      kExpectedRequestMessageFormat, Base64Encode(kContentId).c_str());
+  EXPECT_CALL(*mock_request_signer_, GenerateSignature(expected_message, _))
+      .WillOnce(DoAll(SetArgPointee<1>(kMockSignature), Return(true)));
+
+  std::string expected_post_data =
+      base::StringPrintf(kExpectedSignedMessageFormat,
+                         Base64Encode(expected_message).c_str(),
+                         Base64Encode(kMockSignature).c_str(),
+                         kSignerName);
+  const Status kMockStatus = Status::UNKNOWN;
+  EXPECT_CALL(*mock_http_fetcher_, Post(kServerUrl, expected_post_data, _))
+      .WillOnce(Return(kMockStatus));
+
+  CreateWidevineEncryptorSource();
+  ASSERT_EQ(kMockStatus, widevine_encryptor_source_->Initialize());
+}
+
+TEST_F(WidevineEncryptorSourceTest, LicenseStatusOK) {
+  EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
+      .WillOnce(Return(true));
+
+  std::string mock_license_status =
+      base::StringPrintf(kLicenseOkResponseFormat,
+                         kTrackType,
+                         Base64Encode(kMockKeyId).c_str(),
+                         Base64Encode(kMockKey).c_str(),
+                         Base64Encode(kMockPsshData).c_str());
+  std::string expected_response = base::StringPrintf(
+      kHttpResponseFormat, Base64Encode(mock_license_status).c_str());
+
+  EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
+      .WillOnce(DoAll(SetArgPointee<2>(expected_response), Return(Status::OK)));
+
+  CreateWidevineEncryptorSource();
+  ASSERT_OK(widevine_encryptor_source_->Initialize());
+  EXPECT_EQ(kMockKeyId, ToString(widevine_encryptor_source_->key_id()));
+  EXPECT_EQ(kMockKey, ToString(widevine_encryptor_source_->key()));
+  EXPECT_EQ(kMockPsshData, ToString(widevine_encryptor_source_->pssh()));
+}
+
+TEST_F(WidevineEncryptorSourceTest, RetryOnTransientError) {
+  EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
+      .WillOnce(Return(true));
+
+  std::string mock_license_status = base::StringPrintf(
+      kLicenseErrorResponseFormat, kLicenseStatusTransientError);
+  std::string expected_response = base::StringPrintf(
+      kHttpResponseFormat, Base64Encode(mock_license_status).c_str());
+
+  std::string mock_retried_license_status =
+      base::StringPrintf(kLicenseOkResponseFormat,
+                         kTrackType,
+                         Base64Encode(kMockKeyId).c_str(),
+                         Base64Encode(kMockKey).c_str(),
+                         Base64Encode(kMockPsshData).c_str());
+  std::string expected_retried_response = base::StringPrintf(
+      kHttpResponseFormat, Base64Encode(mock_retried_license_status).c_str());
+
+  // Retry is expected on transient error.
+  EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
+      .WillOnce(DoAll(SetArgPointee<2>(expected_response), Return(Status::OK)))
+      .WillOnce(DoAll(SetArgPointee<2>(expected_retried_response),
+                      Return(Status::OK)));
+
+  CreateWidevineEncryptorSource();
+  ASSERT_OK(widevine_encryptor_source_->Initialize());
+  EXPECT_EQ(kMockKeyId, ToString(widevine_encryptor_source_->key_id()));
+  EXPECT_EQ(kMockKey, ToString(widevine_encryptor_source_->key()));
+  EXPECT_EQ(kMockPsshData, ToString(widevine_encryptor_source_->pssh()));
+}
+
+TEST_F(WidevineEncryptorSourceTest, NoRetryOnUnknownError) {
+  EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
+      .WillOnce(Return(true));
+
+  std::string mock_license_status = base::StringPrintf(
+      kLicenseErrorResponseFormat, kLicenseStatusUnknownError);
+  std::string mock_response = base::StringPrintf(
+      kHttpResponseFormat, Base64Encode(mock_license_status).c_str());
+
+  EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
+      .WillOnce(DoAll(SetArgPointee<2>(mock_response), Return(Status::OK)));
+
+  CreateWidevineEncryptorSource();
+  ASSERT_EQ(error::SERVER_ERROR,
+            widevine_encryptor_source_->Initialize().error_code());
+}
+
+}  // namespace media