AU: Verify that the applied delta update matches the server-sent hashes.

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/set_bootable_flag_action.h"
 #include "update_engine/update_attempter.h"
 
 using std::string;
 using testing::_;
 using testing::DoAll;
 using testing::InSequence;
+using testing::Ne;
 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 94 matching lines @@
 
 TEST_F(UpdateAttempterTest, MarkDeltaUpdateFailureTest) {
   attempter_.is_full_update_ = false;
   EXPECT_CALL(prefs_, GetInt64(kPrefsDeltaUpdateFailures, _))
       .WillOnce(Return(false))
       .WillOnce(DoAll(SetArgumentPointee<1>(-1), Return(true)))
       .WillOnce(DoAll(SetArgumentPointee<1>(1), Return(true)))
       .WillOnce(DoAll(
           SetArgumentPointee<1>(UpdateAttempter::kMaxDeltaUpdateFailures),
           Return(true)));
+  EXPECT_CALL(prefs_, SetInt64(Ne(kPrefsDeltaUpdateFailures), _))
+      .WillRepeatedly(Return(true));
   EXPECT_CALL(prefs_, SetInt64(kPrefsDeltaUpdateFailures, 1)).Times(2);
   EXPECT_CALL(prefs_, SetInt64(kPrefsDeltaUpdateFailures, 2)).Times(1);
   EXPECT_CALL(prefs_, SetInt64(kPrefsDeltaUpdateFailures,
                                UpdateAttempter::kMaxDeltaUpdateFailures + 1))
       .Times(1);
   for (int i = 0; i < 4; i ++)
     attempter_.MarkDeltaUpdateFailure();
 }
 
 TEST_F(UpdateAttempterTest, UpdateStatusToStringTest) {
@@ skipping 51 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