Revert of Let SyncBackupManager keep backup data in memory until shutdown. Only persist

sync/syncable/deferred_on_disk_directory_backing_store_unittest.cc

-// Copyright (c) 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 "base/files/scoped_temp_dir.h"
-#include "base/stl_util.h"
-#include "sync/syncable/deferred_on_disk_directory_backing_store.h"
-#include "sync/syncable/directory.h"
-#include "sync/syncable/entry_kernel.h"
-#include "sync/syncable/on_disk_directory_backing_store.h"
-#include "sync/syncable/syncable_delete_journal.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace syncer {
-namespace syncable {
-namespace {
-
-static const base::FilePath::CharType kSyncDataFolderName[] =
-    FILE_PATH_LITERAL("Sync Data");
-
-class DeferredOnDiskDirectoryBackingStoreTest : public testing::Test {
- protected:
-  virtual void SetUp() OVERRIDE {
-    CHECK(temp_dir_.CreateUniqueTempDir());
-    db_path_ = temp_dir_.path().Append(kSyncDataFolderName);
-  }
-
-  virtual void TearDown() OVERRIDE {
-    STLDeleteValues(&handles_map_);
-  }
-
-  base::ScopedTempDir temp_dir_;
-  base::FilePath db_path_;
-  Directory::MetahandlesMap handles_map_;
-  JournalIndex delete_journals_;
-  Directory::KernelLoadInfo kernel_load_info_;
-};
-
-// Test initialization of root entry when calling Load().
-TEST_F(DeferredOnDiskDirectoryBackingStoreTest, Load) {
-  DeferredOnDiskDirectoryBackingStore store("test", db_path_);
-  EXPECT_EQ(OPENED, store.Load(&handles_map_, &delete_journals_,
-                               &kernel_load_info_));
-  EXPECT_TRUE(delete_journals_.empty());
-  ASSERT_EQ(1u, handles_map_.size());   // root node
-  ASSERT_TRUE(handles_map_.count(1));
-  EntryKernel* root = handles_map_[1];
-  EXPECT_TRUE(root->ref(ID).IsRoot());
-  EXPECT_EQ(1, root->ref(META_HANDLE));
-  EXPECT_TRUE(root->ref(IS_DIR));
-}
-
-// Test on-disk DB is not created if SaveChanges() is not called.
-TEST_F(DeferredOnDiskDirectoryBackingStoreTest,
-       DontPersistIfSavingChangesNotCalled) {
-  {
-    // Open and close.
-    DeferredOnDiskDirectoryBackingStore store("test", db_path_);
-    EXPECT_EQ(OPENED, store.Load(&handles_map_, &delete_journals_,
-                                 &kernel_load_info_));
-  }
-
-  EXPECT_FALSE(base::PathExists(db_path_));
-}
-
-// Test on-disk DB is not created when there are no changes.
-TEST_F(DeferredOnDiskDirectoryBackingStoreTest,
-       DontPersistWhenSavingNoChanges) {
-  {
-    // Open and close.
-    DeferredOnDiskDirectoryBackingStore store("test", db_path_);
-    EXPECT_EQ(OPENED, store.Load(&handles_map_, &delete_journals_,
-                                 &kernel_load_info_));
-
-    Directory::SaveChangesSnapshot snapshot;
-    store.SaveChanges(snapshot);
-  }
-
-  EXPECT_FALSE(base::PathExists(db_path_));
-}
-
-// Test changes are persisted to disk when SaveChanges() is called.
-TEST_F(DeferredOnDiskDirectoryBackingStoreTest, PersistWhenSavingValidChanges) {
-  {
-    // Open and close.
-    DeferredOnDiskDirectoryBackingStore store("test", db_path_);
-    EXPECT_EQ(OPENED, store.Load(&handles_map_, &delete_journals_,
-                                 &kernel_load_info_));
-
-    Directory::SaveChangesSnapshot snapshot;
-    EntryKernel* entry = new EntryKernel();
-    entry->put(ID, Id::CreateFromClientString("test_entry"));
-    entry->put(META_HANDLE, 2);
-    entry->mark_dirty(NULL);
-    snapshot.dirty_metas.insert(entry);
-    store.SaveChanges(snapshot);
-  }
-
-  STLDeleteValues(&handles_map_);
-
-  ASSERT_TRUE(base::PathExists(db_path_));
-  OnDiskDirectoryBackingStore read_store("test", db_path_);
-  EXPECT_EQ(OPENED, read_store.Load(&handles_map_, &delete_journals_,
-                                    &kernel_load_info_));
-  ASSERT_EQ(2u, handles_map_.size());
-  ASSERT_TRUE(handles_map_.count(1));     // root node
-  ASSERT_TRUE(handles_map_.count(2));
-  EntryKernel* entry = handles_map_[2];
-  EXPECT_EQ(Id::CreateFromClientString("test_entry"), entry->ref(ID));
-}
-
-}  // namespace
-}  // namespace syncable
-}  // namespace syncer