Properly handle initialization failure and following manager shutdown without

sync/internal_api/sync_backup_manager_unittest.cc

 // Copyright 2014 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 "sync/internal_api/sync_backup_manager.h"
 
 #include "base/files/scoped_temp_dir.h"
+#include "base/run_loop.h"
 #include "sync/internal_api/public/read_node.h"
 #include "sync/internal_api/public/read_transaction.h"
+#include "sync/internal_api/public/sessions/sync_session_snapshot.h"
 #include "sync/internal_api/public/test/test_internal_components_factory.h"
 #include "sync/internal_api/public/write_node.h"
 #include "sync/internal_api/public/write_transaction.h"
 #include "sync/syncable/entry.h"
 #include "sync/test/test_directory_backing_store.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using ::testing::_;
+using ::testing::Invoke;
+using ::testing::WithArgs;
+
 namespace syncer {
 
 namespace {
 
 void OnConfigDone(bool success) {
   EXPECT_TRUE(success);
 }
 
-class SyncBackupManagerTest : public testing::Test {
+class SyncBackupManagerTest : public syncer::SyncManager::Observer,
+                              public testing::Test {
+ public:
+  MOCK_METHOD1(OnSyncCycleCompleted,

[Nicolas Zea, 2014/07/02 18:48:08]

what are these mocks used for?

[haitaol1, 2014/07/02 20:52:54]

Only intereested in OnInitializationComplete but need to declare others because
SyncManager::Observer is abstract.

On 2014/07/02 18:48:08, Nicolas Zea wrote:

+               void(const sessions::SyncSessionSnapshot&));
+  MOCK_METHOD1(OnConnectionStatusChange, void(ConnectionStatus));
+  MOCK_METHOD1(OnActionableError, void(const SyncProtocolError&));
+  MOCK_METHOD1(OnMigrationRequested, void(ModelTypeSet));;
+  MOCK_METHOD1(OnProtocolEvent, void(const ProtocolEvent&));
+  MOCK_METHOD4(OnInitializationComplete,
+               void(const WeakHandle<JsBackend>&,
+                    const WeakHandle<DataTypeDebugInfoListener>&,
+                    bool, ModelTypeSet));
+
  protected:
   virtual void SetUp() OVERRIDE {
     CHECK(temp_dir_.CreateUniqueTempDir());
   }
 
-  void InitManager(SyncManager* manager) {
+  void InitManager(SyncManager* manager, StorageOption storage_option) {
+    manager_ = manager;
+    EXPECT_CALL(*this, OnInitializationComplete(_, _, _, _))
+        .WillOnce(WithArgs<2>(Invoke(this,
+                                     &SyncBackupManagerTest::HandleInit)));
+
     TestInternalComponentsFactory factory(InternalComponentsFactory::Switches(),
-                                          STORAGE_ON_DISK);
+                                          storage_option);
+    manager->AddObserver(this);
 
+    base::RunLoop run_loop;
     manager->Init(temp_dir_.path(),
                   MakeWeakHandle(base::WeakPtr<JsEventHandler>()),
                   "", 0, true, scoped_ptr<HttpPostProviderFactory>().Pass(),
                   std::vector<scoped_refptr<ModelSafeWorker> >(),
                   NULL, NULL, SyncCredentials(), "", "", "", &factory,
                   NULL, scoped_ptr<UnrecoverableErrorHandler>().Pass(),
                   NULL, NULL);
-    manager->ConfigureSyncer(
-          CONFIGURE_REASON_NEW_CLIENT,
-          ModelTypeSet(SEARCH_ENGINES),
-          ModelTypeSet(), ModelTypeSet(), ModelTypeSet(),
-          ModelSafeRoutingInfo(),
-          base::Bind(&OnConfigDone, true),
-          base::Bind(&OnConfigDone, false));
+    loop_.PostTask(FROM_HERE, run_loop.QuitClosure());
+    run_loop.Run();
   }
 
   void CreateEntry(UserShare* user_share, ModelType type,
                    const std::string& client_tag) {
     WriteTransaction trans(FROM_HERE, user_share);
     ReadNode type_root(&trans);
     EXPECT_EQ(BaseNode::INIT_OK, type_root.InitTypeRoot(type));
 
     WriteNode node(&trans);
     EXPECT_EQ(WriteNode::INIT_SUCCESS,
               node.InitUniqueByCreation(type, type_root, client_tag));
   }
 
+ private:
+  void ConfigureSyncer() {
+    manager_->ConfigureSyncer(CONFIGURE_REASON_NEW_CLIENT,
+                              ModelTypeSet(SEARCH_ENGINES),
+                              ModelTypeSet(), ModelTypeSet(), ModelTypeSet(),
+                              ModelSafeRoutingInfo(),
+                              base::Bind(&OnConfigDone, true),
+                              base::Bind(&OnConfigDone, false));
+  }
+
+  void HandleInit(bool success) {
+    if (success) {
+      loop_.PostTask(FROM_HERE,
+                     base::Bind(&SyncBackupManagerTest::ConfigureSyncer,
+                                base::Unretained(this)));
+    } else {
+      manager_->ShutdownOnSyncThread();
+    }
+  }
+
   base::ScopedTempDir temp_dir_;
   base::MessageLoop loop_;    // Needed for WeakHandle
+  SyncManager* manager_;
 };
 
 TEST_F(SyncBackupManagerTest, NormalizeAndPersist) {
   scoped_ptr<SyncBackupManager> manager(new SyncBackupManager);
-  InitManager(manager.get());
+  InitManager(manager.get(), STORAGE_ON_DISK);
 
   CreateEntry(manager->GetUserShare(), SEARCH_ENGINES, "test");
 
   {
     // New entry is local and unsynced at first.
     ReadTransaction trans(FROM_HERE, manager->GetUserShare());
     ReadNode pref(&trans);
     EXPECT_EQ(BaseNode::INIT_OK,
               pref.InitByClientTagLookup(SEARCH_ENGINES, "test"));
     EXPECT_FALSE(pref.GetEntry()->GetId().ServerKnows());
     EXPECT_TRUE(pref.GetEntry()->GetIsUnsynced());
   }
 
   manager->SaveChanges();
 
   {
     // New entry has server ID and unsynced bit is cleared after saving.
     ReadTransaction trans(FROM_HERE, manager->GetUserShare());
     ReadNode pref(&trans);
     EXPECT_EQ(BaseNode::INIT_OK,
               pref.InitByClientTagLookup(SEARCH_ENGINES, "test"));
     EXPECT_TRUE(pref.GetEntry()->GetId().ServerKnows());
     EXPECT_FALSE(pref.GetEntry()->GetIsUnsynced());
   }
   manager->ShutdownOnSyncThread();
 
   // Reopen db to verify entry is persisted.
   manager.reset(new SyncBackupManager);
-  InitManager(manager.get());
+  InitManager(manager.get(), STORAGE_ON_DISK);
   {
     ReadTransaction trans(FROM_HERE, manager->GetUserShare());
     ReadNode pref(&trans);
     EXPECT_EQ(BaseNode::INIT_OK,
               pref.InitByClientTagLookup(SEARCH_ENGINES, "test"));
     EXPECT_TRUE(pref.GetEntry()->GetId().ServerKnows());
     EXPECT_FALSE(pref.GetEntry()->GetIsUnsynced());
   }
 }
 
+TEST_F(SyncBackupManagerTest, FailToInitialize) {
+  // Test graceful shutdown on initialization failure.
+  scoped_ptr<SyncBackupManager> manager(new SyncBackupManager);
+  InitManager(manager.get(), STORAGE_INVALID);
+}
+
 }  // anonymous namespace
 
 }  // namespace syncer