Add the JNI code in order to let Java use the InterestsFetcher.

chrome/browser/interests/interests_fetcher_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/interests/interests_fetcher.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
@@ skipping 60 matching lines @@
       : request_context_(new net::TestURLRequestContextGetter(
             base::ThreadTaskRunnerHandle::Get())),
         url_fetcher_factory_(new net::TestURLFetcherFactory()) {
     token_service_.UpdateCredentials(kAccountId, "refresh_token");
 
     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 
     command_line->AppendSwitchASCII(switches::kInterestsURL, kInterestsURL);
   }
 
-  MOCK_METHOD1(OnReceivedInterests,
-               void(const std::vector<InterestsFetcher::Interest>&));
+  MOCK_METHOD0(OnSuccessfulResponse, void());
+  MOCK_METHOD0(OnEmptyResponse, void());
+  MOCK_METHOD0(OnFailedResponse, void());
 
+  void OnReceivedInterests(
+      scoped_ptr<std::vector<InterestsFetcher::Interest>> interests) {
+
+    if (interests) {

[Bernhard Bauer, 2015/10/08 09:04:41]

Early-return if (!interests)?

[PEConn, 2015/10/08 09:40:56]

Done.

+      if (*interests == GetExpectedEmptyResponse())
+        OnEmptyResponse();
+      else if (*interests == GetExpectedSuccessfulResponse())
+        OnSuccessfulResponse();

[Bernhard Bauer, 2015/10/08 09:04:41]

Add an additional else that fails the test, in case a different response is
received?

[PEConn, 2015/10/08 09:40:56]

Done.

+    } else {
+      OnFailedResponse();
+    }
+  }
  protected:
   void RequestInterests() {
     request_.reset(new InterestsFetcher(&token_service_,
                                         kAccountId,
                                         request_context_.get()));
 
     request_->FetchInterests(base::Bind(
         &InterestsFetcherTest::OnReceivedInterests, base::Unretained(this)));
   }
 
@@ skipping 39 matching lines @@
 
   base::MessageLoop message_loop_;
   FakeProfileOAuth2TokenService token_service_;
   scoped_refptr<net::TestURLRequestContextGetter> request_context_;
   scoped_ptr<net::TestURLFetcherFactory> url_fetcher_factory_;
   scoped_ptr<InterestsFetcher> request_;
 };
 
 TEST_F(InterestsFetcherTest, EmptyResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnEmptyResponse());
   IssueAccessTokens();
   SendValidResponse(kEmptyResponse);
 }
 
 TEST_F(InterestsFetcherTest, SuccessfullResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedSuccessfulResponse()));
+  EXPECT_CALL(*this, OnSuccessfulResponse());
   IssueAccessTokens();
   SendValidResponse(kSuccessfulResponse);
 }
 
 TEST_F(InterestsFetcherTest, FailedResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokens();
   SendFailedResponse();
 }
 
 TEST_F(InterestsFetcherTest, FailedOAuthRequest) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokenErrors();
 }
 
 TEST_F(InterestsFetcherTest, RetryOnAuthorizationError) {
   RequestInterests();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse())).Times(0);
+  EXPECT_CALL(*this, OnEmptyResponse()).Times(0);
   IssueAccessTokens();
   SendAuthorizationError();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnEmptyResponse());
   IssueAccessTokens();
   SendValidResponse(kEmptyResponse);
 }
 
 TEST_F(InterestsFetcherTest, RetryOnlyOnceOnAuthorizationError) {
   RequestInterests();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse())).Times(0);
+  EXPECT_CALL(*this, OnEmptyResponse()).Times(0);
   IssueAccessTokens();
   SendAuthorizationError();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokens();
   SendAuthorizationError();
 }