Revert 141514 - Remove CachingValueStore in favor of an async ValueStoreFrontend.

chrome/browser/value_store/value_store_frontend_unittest.cc

-// Copyright (c) 2012 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/file_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
-#include "base/path_service.h"
-#include "base/scoped_temp_dir.h"
-#include "chrome/browser/value_store/value_store_frontend.h"
-#include "chrome/common/chrome_paths.h"
-#include "content/public/test/test_browser_thread.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using content::BrowserThread;
-
-// Test suite for CachingValueStore, using a test database with a few simple
-// entries.
-class ValueStoreFrontendTest : public testing::Test {
- public:
-  ValueStoreFrontendTest()
-      : ui_thread_(BrowserThread::UI, MessageLoop::current()),
-        file_thread_(BrowserThread::FILE, MessageLoop::current()) {
-  }
-
-  virtual void SetUp() {
-    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-
-    FilePath test_data_dir;
-    ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir));
-    FilePath src_db(test_data_dir.AppendASCII("value_store_db"));
-    db_path_ = temp_dir_.path().AppendASCII("temp_db");
-    file_util::CopyDirectory(src_db, db_path_, true);
-
-    ResetStorage();
-  }
-
-  virtual void TearDown() {
-    MessageLoop::current()->RunAllPending();  // wait for storage to delete
-    storage_.reset();
-  }
-
-  // Reset the value store, reloading the DB from disk.
-  void ResetStorage() {
-    storage_.reset(new ValueStoreFrontend(db_path_));
-  }
-
-  bool Get(const std::string& key, scoped_ptr<base::Value>* output) {
-    storage_->Get(key, base::Bind(&ValueStoreFrontendTest::GetAndWait,
-                                  base::Unretained(this), output));
-    MessageLoop::current()->Run();  // wait for GetAndWait
-    return !!output->get();
-  }
-
- protected:
-  void GetAndWait(scoped_ptr<base::Value>* output,
-                  scoped_ptr<base::Value> result) {
-    *output = result.Pass();
-    MessageLoop::current()->Quit();
-  }
-
-  scoped_ptr<ValueStoreFrontend> storage_;
-  ScopedTempDir temp_dir_;
-  FilePath db_path_;
-  MessageLoop message_loop_;
-  content::TestBrowserThread ui_thread_;
-  content::TestBrowserThread file_thread_;
-};
-
-TEST_F(ValueStoreFrontendTest, GetExistingData) {
-  scoped_ptr<base::Value> value(NULL);
-  ASSERT_FALSE(Get("key0", &value));
-
-  // Test existing keys in the DB.
-  {
-    ASSERT_TRUE(Get("key1", &value));
-    std::string result;
-    ASSERT_TRUE(value->GetAsString(&result));
-    EXPECT_EQ("value1", result);
-  }
-
-  {
-    ASSERT_TRUE(Get("key2", &value));
-    int result;
-    ASSERT_TRUE(value->GetAsInteger(&result));
-    EXPECT_EQ(2, result);
-  }
-}
-
-TEST_F(ValueStoreFrontendTest, ChangesPersistAfterReload) {
-  storage_->Set("key0",
-      scoped_ptr<base::Value>(base::Value::CreateIntegerValue(0)));
-  storage_->Set("key1",
-      scoped_ptr<base::Value>(base::Value::CreateStringValue("new1")));
-  storage_->Remove("key2");
-
-  // Reload the DB and test our changes.
-  ResetStorage();
-
-  scoped_ptr<base::Value> value(NULL);
-  {
-    ASSERT_TRUE(Get("key0", &value));
-    int result;
-    ASSERT_TRUE(value->GetAsInteger(&result));
-    EXPECT_EQ(0, result);
-  }
-
-  {
-    ASSERT_TRUE(Get("key1", &value));
-    std::string result;
-    ASSERT_TRUE(value->GetAsString(&result));
-    EXPECT_EQ("new1", result);
-  }
-
-  ASSERT_FALSE(Get("key2", &value));
-}