extensions/browser/api/storage/storage_api_unittest.cc

   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
  27 namespace extensions {
  28
  29 namespace {
  30
  31 // Caller owns the returned object.
  32 KeyedService* CreateStorageFrontendForTesting(
  33     content::BrowserContext* context) {
  34   return StorageFrontend::CreateForTesting(new LeveldbSettingsStorageFactory(),
  35                                            context);
  36 }
  37
  38 }  // namespace
  39
  40 class 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
  80 TEST_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