storage_api_unittest.cc revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
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 "chrome/browser/extensions/extension_api_unittest.h"
10#include "chrome/browser/extensions/test_extension_system.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/event_router.h"
17#include "extensions/browser/extension_prefs.h"
18#include "extensions/browser/extension_system.h"
19#include "extensions/browser/value_store/leveldb_value_store.h"
20#include "extensions/browser/value_store/value_store.h"
21#include "extensions/common/id_util.h"
22#include "extensions/common/manifest.h"
23#include "extensions/common/test_util.h"
24#include "third_party/leveldatabase/src/include/leveldb/db.h"
25#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
26
27namespace extensions {
28
29namespace {
30
31// Caller owns the returned object.
32KeyedService* CreateStorageFrontendForTesting(
33    content::BrowserContext* context) {
34  return StorageFrontend::CreateForTesting(new LeveldbSettingsStorageFactory(),
35                                           context);
36}
37
38}  // namespace
39
40class StorageApiUnittest : public ExtensionApiUnittest {
41 public:
42  virtual void SetUp() OVERRIDE {
43    ExtensionApiUnittest::SetUp();
44    TestExtensionSystem* extension_system =
45        static_cast<TestExtensionSystem*>(ExtensionSystem::Get(profile()));
46    // StorageFrontend requires an EventRouter.
47    extension_system->SetEventRouter(scoped_ptr<EventRouter>(
48        new EventRouter(profile(), ExtensionPrefs::Get(profile()))));
49  }
50
51 protected:
52  // Runs the storage.set() API function with local storage.
53  void RunSetFunction(const std::string& key, const std::string& value) {
54    RunFunction(
55        new StorageStorageAreaSetFunction(),
56        base::StringPrintf(
57            "[\"local\", {\"%s\": \"%s\"}]", key.c_str(), value.c_str()));
58  }
59
60  // Runs the storage.get() API function with the local storage, and populates
61  // |value| with the string result.
62  testing::AssertionResult RunGetFunction(const std::string& key,
63                                          std::string* value) {
64    scoped_ptr<base::Value> result = RunFunctionAndReturnValue(
65        new StorageStorageAreaGetFunction(),
66        base::StringPrintf("[\"local\", \"%s\"]", key.c_str()));
67    if (!result.get())
68      return testing::AssertionFailure() << "No result";
69    base::DictionaryValue* dict = NULL;
70    if (!result->GetAsDictionary(&dict))
71      return testing::AssertionFailure() << result << " was not a dictionary.";
72    if (!dict->GetString(key, value)) {
73      return testing::AssertionFailure() << " could not retrieve a string from"
74          << dict << " at " << key;
75    }
76    return testing::AssertionSuccess();
77  }
78};
79
80TEST_F(StorageApiUnittest, RestoreCorruptedStorage) {
81  // Ensure a StorageFrontend can be created on demand. The StorageFrontend
82  // will be owned by the KeyedService system.
83  StorageFrontend::GetFactoryInstance()->SetTestingFactory(
84      profile(), &CreateStorageFrontendForTesting);
85
86  const char kKey[] = "key";
87  const char kValue[] = "value";
88  std::string result;
89
90  // Do a simple set/get combo to make sure the API works.
91  RunSetFunction(kKey, kValue);
92  EXPECT_TRUE(RunGetFunction(kKey, &result));
93  EXPECT_EQ(kValue, result);
94
95  // Corrupt the store. This is not as pretty as ideal, because we use knowledge
96  // of the underlying structure, but there's no real good way to corrupt a
97  // store other than directly modifying the files.
98  ValueStore* store =
99      settings_test_util::GetStorage(extension_ref(),
100                                     settings_namespace::LOCAL,
101                                     StorageFrontend::Get(profile()));
102  ASSERT_TRUE(store);
103  SettingsStorageQuotaEnforcer* quota_store =
104      static_cast<SettingsStorageQuotaEnforcer*>(store);
105  LeveldbValueStore* leveldb_store =
106      static_cast<LeveldbValueStore*>(quota_store->get_delegate_for_test());
107  leveldb::WriteBatch batch;
108  batch.Put(kKey, "[{(.*+\"\'\\");
109  EXPECT_TRUE(leveldb_store->WriteToDbForTest(&batch));
110  EXPECT_TRUE(leveldb_store->Get(kKey)->IsCorrupted());
111
112  // Running another set should end up working (even though it will restore the
113  // store behind the scenes).
114  RunSetFunction(kKey, kValue);
115  EXPECT_TRUE(RunGetFunction(kKey, &result));
116  EXPECT_EQ(kValue, result);
117}
118
119}  // namespace extensions
120