AU: Use NiceMock<PrefsMock to suppress uninteresting call warnings.

update_attempter_unittest.cc

 // Copyright (c) 2010 The Chromium OS 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 <base/file_util.h>
 #include <gtest/gtest.h>
 
 #include "update_engine/action_mock.h"
 #include "update_engine/action_processor_mock.h"
 #include "update_engine/filesystem_copier_action.h"
 #include "update_engine/postinstall_runner_action.h"
 #include "update_engine/prefs_mock.h"
 #include "update_engine/update_attempter.h"
 
 using std::string;
 using testing::_;
 using testing::DoAll;
 using testing::InSequence;
 using testing::Ne;
+using testing::NiceMock;
 using testing::Property;
 using testing::Return;
 using testing::SetArgumentPointee;
 
 namespace chromeos_update_engine {
 
 // Test a subclass rather than the main class directly so that we can mock out
 // methods within the class. There're explicit unit tests for the mocked out
 // methods.
 class UpdateAttempterUnderTest : public UpdateAttempter {
@@ skipping 19 matching lines @@
     EXPECT_EQ("0.0.0.0", attempter_.new_version_);
     EXPECT_EQ(0, attempter_.new_size_);
     EXPECT_FALSE(attempter_.is_full_update_);
     processor_ = new ActionProcessorMock();
     attempter_.processor_.reset(processor_);  // Transfers ownership.
     attempter_.prefs_ = &prefs_;
   }
 
   UpdateAttempterUnderTest attempter_;
   ActionProcessorMock* processor_;
-  PrefsMock prefs_;
+  NiceMock<PrefsMock> prefs_;
 };
 
 TEST_F(UpdateAttempterTest, RunAsRootConstructWithUpdatedMarkerTest) {
   extern const char* kUpdateCompletedMarker;
   const FilePath kMarker(kUpdateCompletedMarker);
   EXPECT_EQ(0, file_util::WriteFile(kMarker, "", 0));
   UpdateAttempterUnderTest attempter;
   EXPECT_EQ(UPDATE_STATUS_UPDATED_NEED_REBOOT, attempter.status());
   EXPECT_TRUE(file_util::Delete(kMarker, false));
 }
@@ skipping 121 matching lines @@
   EXPECT_EQ(attempter_.response_handler_action_.get(),
             attempter_.actions_[1].get());
   DownloadAction* download_action =
       dynamic_cast<DownloadAction*>(attempter_.actions_[5].get());
   ASSERT_TRUE(download_action != NULL);
   EXPECT_EQ(&attempter_, download_action->delegate());
   EXPECT_EQ(UPDATE_STATUS_CHECKING_FOR_UPDATE, attempter_.status());
 }
 
 }  // namespace chromeos_update_engine