1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/command_line.h"
6#include "base/files/file_path.h"
7#include "base/memory/ref_counted.h"
8#include "base/strings/stringprintf.h"
9#include "content/public/test/test_browser_context.h"
10#include "extensions/browser/api/extensions_api_client.h"
11#include "extensions/browser/api/storage/leveldb_settings_storage_factory.h"
12#include "extensions/browser/api/storage/settings_storage_quota_enforcer.h"
13#include "extensions/browser/api/storage/settings_test_util.h"
14#include "extensions/browser/api/storage/storage_api.h"
15#include "extensions/browser/api/storage/storage_frontend.h"
16#include "extensions/browser/api_unittest.h"
17#include "extensions/browser/event_router.h"
18#include "extensions/browser/extension_prefs.h"
19#include "extensions/browser/extension_system.h"
20#include "extensions/browser/mock_extension_system.h"
21#include "extensions/browser/test_extensions_browser_client.h"
22#include "extensions/browser/value_store/leveldb_value_store.h"
23#include "extensions/browser/value_store/value_store.h"
24#include "extensions/common/manifest.h"
25#include "extensions/common/test_util.h"
26#include "third_party/leveldatabase/src/include/leveldb/db.h"
27#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
28
29namespace extensions {
30
31namespace {
32
33// Caller owns the returned object.
34KeyedService* CreateStorageFrontendForTesting(
35    content::BrowserContext* context) {
36  return StorageFrontend::CreateForTesting(new LeveldbSettingsStorageFactory(),
37                                           context);
38}
39
40}  // namespace
41
42class StorageApiUnittest : public ApiUnitTest {
43 public:
44  StorageApiUnittest() {}
45
46  virtual void SetUp() OVERRIDE {
47    ApiUnitTest::SetUp();
48    extensions_browser_client()->set_extension_system_factory(
49        &extension_system_factory_);
50  }
51
52 protected:
53  // Runs the storage.set() API function with local storage.
54  void RunSetFunction(const std::string& key, const std::string& value) {
55    RunFunction(
56        new StorageStorageAreaSetFunction(),
57        base::StringPrintf(
58            "[\"local\", {\"%s\": \"%s\"}]", key.c_str(), value.c_str()));
59  }
60
61  // Runs the storage.get() API function with the local storage, and populates
62  // |value| with the string result.
63  testing::AssertionResult RunGetFunction(const std::string& key,
64                                          std::string* value) {
65    scoped_ptr<base::Value> result = RunFunctionAndReturnValue(
66        new StorageStorageAreaGetFunction(),
67        base::StringPrintf("[\"local\", \"%s\"]", key.c_str()));
68    if (!result.get())
69      return testing::AssertionFailure() << "No result";
70    base::DictionaryValue* dict = NULL;
71    if (!result->GetAsDictionary(&dict))
72      return testing::AssertionFailure() << result << " was not a dictionary.";
73    if (!dict->GetString(key, value)) {
74      return testing::AssertionFailure() << " could not retrieve a string from"
75          << dict << " at " << key;
76    }
77    return testing::AssertionSuccess();
78  }
79
80  MockExtensionSystemFactory<
81      settings_test_util::MockExtensionSystemWithEventRouter>
82      extension_system_factory_;
83  ExtensionsAPIClient extensions_api_client_;
84};
85
86TEST_F(StorageApiUnittest, RestoreCorruptedStorage) {
87  // Ensure a StorageFrontend can be created on demand. The StorageFrontend
88  // will be owned by the KeyedService system.
89  StorageFrontend::GetFactoryInstance()->SetTestingFactory(
90      browser_context(), &CreateStorageFrontendForTesting);
91
92  const char kKey[] = "key";
93  const char kValue[] = "value";
94  std::string result;
95
96  // Do a simple set/get combo to make sure the API works.
97  RunSetFunction(kKey, kValue);
98  EXPECT_TRUE(RunGetFunction(kKey, &result));
99  EXPECT_EQ(kValue, result);
100
101  // Corrupt the store. This is not as pretty as ideal, because we use knowledge
102  // of the underlying structure, but there's no real good way to corrupt a
103  // store other than directly modifying the files.
104  ValueStore* store =
105      settings_test_util::GetStorage(extension_ref(),
106                                     settings_namespace::LOCAL,
107                                     StorageFrontend::Get(browser_context()));
108  ASSERT_TRUE(store);
109  SettingsStorageQuotaEnforcer* quota_store =
110      static_cast<SettingsStorageQuotaEnforcer*>(store);
111  LeveldbValueStore* leveldb_store =
112      static_cast<LeveldbValueStore*>(quota_store->get_delegate_for_test());
113  leveldb::WriteBatch batch;
114  batch.Put(kKey, "[{(.*+\"\'\\");
115  EXPECT_TRUE(leveldb_store->WriteToDbForTest(&batch));
116  EXPECT_TRUE(leveldb_store->Get(kKey)->IsCorrupted());
117
118  // Running another set should end up working (even though it will restore the
119  // store behind the scenes).
120  RunSetFunction(kKey, kValue);
121  EXPECT_TRUE(RunGetFunction(kKey, &result));
122  EXPECT_EQ(kValue, result);
123}
124
125}  // namespace extensions
126