[Sync] Move //sync to //components/sync.

sync/internal_api/model_type_store_backend_unittest.cc

-// Copyright 2015 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/public/model_type_store_backend.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/leveldatabase/src/include/leveldb/env.h"
-#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
-
-namespace syncer_v2 {
-
-class ModelTypeStoreBackendTest : public testing::Test {
- public:
-  scoped_refptr<ModelTypeStoreBackend> GetOrCreateBackend() {
-    std::string path = "/test_db";
-    return GetOrCreateBackendWithPath(path);
-  }
-
-  scoped_refptr<ModelTypeStoreBackend> GetOrCreateBackendWithPath(
-      std::string custom_path) {
-    std::unique_ptr<leveldb::Env> in_memory_env =
-        ModelTypeStoreBackend::CreateInMemoryEnv();
-    std::string path;
-    in_memory_env->GetTestDirectory(&path);
-    path += custom_path;
-
-    ModelTypeStore::Result result;
-    // In-memory store backend works on the same thread as test.
-    scoped_refptr<ModelTypeStoreBackend> backend =
-        ModelTypeStoreBackend::GetOrCreateBackend(
-            path, std::move(in_memory_env), &result);
-    EXPECT_TRUE(backend.get());
-    EXPECT_EQ(result, ModelTypeStore::Result::SUCCESS);
-    return backend;
-  }
-
-  bool BackendExistsForPath(std::string path) {
-    if (ModelTypeStoreBackend::backend_map_.Get().end() ==
-        ModelTypeStoreBackend::backend_map_.Get().find(path)) {
-      return false;
-    }
-    return true;
-  }
-
-  std::string GetBackendPath(scoped_refptr<ModelTypeStoreBackend> backend) {
-    return backend->path_;
-  }
-};
-
-// Test that after record is written to backend it can be read back even after
-// backend is destroyed and recreated in the same environment.
-TEST_F(ModelTypeStoreBackendTest, WriteThenRead) {
-  scoped_refptr<ModelTypeStoreBackend> backend = GetOrCreateBackend();
-
-  // Write record.
-  std::unique_ptr<leveldb::WriteBatch> write_batch(new leveldb::WriteBatch());
-  write_batch->Put("prefix:id1", "data1");
-  ModelTypeStore::Result result =
-      backend->WriteModifications(std::move(write_batch));
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-
-  // Read all records with prefix.
-  ModelTypeStore::RecordList record_list;
-  result = backend->ReadAllRecordsWithPrefix("prefix:", &record_list);
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-  ASSERT_EQ(1ul, record_list.size());
-  ASSERT_EQ("id1", record_list[0].id);
-  ASSERT_EQ("data1", record_list[0].value);
-  record_list.clear();
-
-  // Recreate backend and read all records with prefix.
-  backend = GetOrCreateBackend();
-  result = backend->ReadAllRecordsWithPrefix("prefix:", &record_list);
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-  ASSERT_EQ(1ul, record_list.size());
-  ASSERT_EQ("id1", record_list[0].id);
-  ASSERT_EQ("data1", record_list[0].value);
-}
-
-// Test that ReadAllRecordsWithPrefix correclty filters records by prefix.
-TEST_F(ModelTypeStoreBackendTest, ReadAllRecordsWithPrefix) {
-  scoped_refptr<ModelTypeStoreBackend> backend = GetOrCreateBackend();
-
-  std::unique_ptr<leveldb::WriteBatch> write_batch(new leveldb::WriteBatch());
-  write_batch->Put("prefix1:id1", "data1");
-  write_batch->Put("prefix2:id2", "data2");
-  ModelTypeStore::Result result =
-      backend->WriteModifications(std::move(write_batch));
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-
-  ModelTypeStore::RecordList record_list;
-  result = backend->ReadAllRecordsWithPrefix("prefix1:", &record_list);
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-  ASSERT_EQ(1UL, record_list.size());
-  ASSERT_EQ("id1", record_list[0].id);
-  ASSERT_EQ("data1", record_list[0].value);
-}
-
-// Test that deleted records are correctly marked as milling in results of
-// ReadRecordsWithPrefix.
-TEST_F(ModelTypeStoreBackendTest, ReadDeletedRecord) {
-  scoped_refptr<ModelTypeStoreBackend> backend = GetOrCreateBackend();
-
-  // Create records, ensure they are returned by ReadRecordsWithPrefix.
-  std::unique_ptr<leveldb::WriteBatch> write_batch(new leveldb::WriteBatch());
-  write_batch->Put("prefix:id1", "data1");
-  write_batch->Put("prefix:id2", "data2");
-  ModelTypeStore::Result result =
-      backend->WriteModifications(std::move(write_batch));
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-
-  ModelTypeStore::IdList id_list;
-  ModelTypeStore::IdList missing_id_list;
-  ModelTypeStore::RecordList record_list;
-  id_list.push_back("id1");
-  id_list.push_back("id2");
-  result = backend->ReadRecordsWithPrefix("prefix:", id_list, &record_list,
-                                          &missing_id_list);
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-  ASSERT_EQ(2UL, record_list.size());
-  ASSERT_TRUE(missing_id_list.empty());
-
-  // Delete one record.
-  write_batch.reset(new leveldb::WriteBatch());
-  write_batch->Delete("prefix:id2");
-  result = backend->WriteModifications(std::move(write_batch));
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-
-  // Ensure deleted record id is returned in missing_id_list.
-  record_list.clear();
-  missing_id_list.clear();
-  result = backend->ReadRecordsWithPrefix("prefix:", id_list, &record_list,
-                                          &missing_id_list);
-  ASSERT_EQ(ModelTypeStore::Result::SUCCESS, result);
-  ASSERT_EQ(1UL, record_list.size());
-  ASSERT_EQ("id1", record_list[0].id);
-  ASSERT_EQ(1UL, missing_id_list.size());
-  ASSERT_EQ("id2", missing_id_list[0]);
-}
-
-// Test that only one backend got create when we ask two backend with same path,
-// and after de-reference the backend, the backend will be deleted.
-TEST_F(ModelTypeStoreBackendTest, TwoSameBackendTest) {
-  // Create two backend with same path, check if they are reference to same
-  // address.
-  scoped_refptr<ModelTypeStoreBackend> backend = GetOrCreateBackend();
-  scoped_refptr<ModelTypeStoreBackend> backend_second = GetOrCreateBackend();
-  std::string path = GetBackendPath(backend);
-  ASSERT_EQ(backend.get(), backend_second.get());
-
-  // Delete one reference, check the real backend still here.
-  backend = nullptr;
-  ASSERT_FALSE(backend.get());
-  ASSERT_TRUE(backend_second.get());
-  ASSERT_TRUE(backend_second->HasOneRef());
-
-  // Delete another reference, check the real backend is deleted.
-  backend_second = nullptr;
-  ASSERT_FALSE(backend_second.get());
-  ASSERT_FALSE(BackendExistsForPath(path));
-}
-
-// Test that two backend got create when we ask two backend with different path,
-// and after de-reference two backend, the both backend will be deleted.
-TEST_F(ModelTypeStoreBackendTest, TwoDifferentBackendTest) {
-  // Create two backend with different path, check if they are reference to
-  // different address.
-  scoped_refptr<ModelTypeStoreBackend> backend = GetOrCreateBackend();
-  scoped_refptr<ModelTypeStoreBackend> backend_second =
-      GetOrCreateBackendWithPath("/test_db2");
-  std::string path = GetBackendPath(backend);
-  ASSERT_NE(backend.get(), backend_second.get());
-  ASSERT_TRUE(backend->HasOneRef());
-  ASSERT_TRUE(backend_second->HasOneRef());
-
-  // delete one backend, check only one got deleted.
-  backend = nullptr;
-  ASSERT_FALSE(backend.get());
-  ASSERT_TRUE(backend_second.get());
-  ASSERT_TRUE(backend_second->HasOneRef());
-  ASSERT_FALSE(BackendExistsForPath(path));
-
-  // delete another backend.
-  backend_second = nullptr;
-  ASSERT_FALSE(backend_second.get());
-  ASSERT_FALSE(BackendExistsForPath("/test_db2"));
-}
-
-}  // namespace syncer_v2