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 "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
  29 namespace extensions {
  30
  31 namespace {
  32
  33 // Caller owns the returned object.
  34 KeyedService* CreateStorageFrontendForTesting(
  35     content::BrowserContext* context) {
  36   return StorageFrontend::CreateForTesting(new LeveldbSettingsStorageFactory(),
  37                                            context);
  38 }
  39
  40 }  // namespace
  41
  42 class StorageApiUnittest : public ApiUnitTest {
  43  public:
  44   StorageApiUnittest() {}
  45   ~StorageApiUnittest() override {}
  46
  47  protected:
  48   // Runs the storage.set() API function with local storage.
  49   void RunSetFunction(const std::string& key, const std::string& value) {
  50     RunFunction(
  51         new StorageStorageAreaSetFunction(),
  52         base::StringPrintf(
  53             "[\"local\", {\"%s\": \"%s\"}]", key.c_str(), value.c_str()));
  54   }
  55
  56   // Runs the storage.get() API function with the local storage, and populates
  57   // |value| with the string result.
  58   testing::AssertionResult RunGetFunction(const std::string& key,
  59                                           std::string* value) {
  60     scoped_ptr<base::Value> result = RunFunctionAndReturnValue(
  61         new StorageStorageAreaGetFunction(),
  62         base::StringPrintf("[\"local\", \"%s\"]", key.c_str()));
  63     if (!result.get())
  64       return testing::AssertionFailure() << "No result";
  65     base::DictionaryValue* dict = NULL;
  66     if (!result->GetAsDictionary(&dict))
  67       return testing::AssertionFailure() << result << " was not a dictionary.";
  68     if (!dict->GetString(key, value)) {
  69       return testing::AssertionFailure() << " could not retrieve a string from"
  70           << dict << " at " << key;
  71     }
  72     return testing::AssertionSuccess();
  73   }
  74
  75   ExtensionsAPIClient extensions_api_client_;
  76 };
  77
  78 TEST_F(StorageApiUnittest, RestoreCorruptedStorage) {
  79   EventRouter event_router(browser_context(), nullptr);
  80   MockExtensionSystem* system = static_cast<MockExtensionSystem*>(
  81       ExtensionSystem::Get(browser_context()));
  82   system->set_event_router(&event_router);
  83
  84   // Ensure a StorageFrontend can be created on demand. The StorageFrontend
  85   // will be owned by the KeyedService system.
  86   StorageFrontend::GetFactoryInstance()->SetTestingFactory(
  87       browser_context(), &CreateStorageFrontendForTesting);
  88
  89   const char kKey[] = "key";
  90   const char kValue[] = "value";
  91   std::string result;
  92
  93   // Do a simple set/get combo to make sure the API works.
  94   RunSetFunction(kKey, kValue);
  95   EXPECT_TRUE(RunGetFunction(kKey, &result));
  96   EXPECT_EQ(kValue, result);
  97
  98   // Corrupt the store. This is not as pretty as ideal, because we use knowledge
  99   // of the underlying structure, but there's no real good way to corrupt a
 100   // store other than directly modifying the files.
 101   ValueStore* store =
 102       settings_test_util::GetStorage(extension_ref(),
 103                                      settings_namespace::LOCAL,
 104                                      StorageFrontend::Get(browser_context()));
 105   ASSERT_TRUE(store);
 106   SettingsStorageQuotaEnforcer* quota_store =
 107       static_cast<SettingsStorageQuotaEnforcer*>(store);
 108   LeveldbValueStore* leveldb_store =
 109       static_cast<LeveldbValueStore*>(quota_store->get_delegate_for_test());
 110   leveldb::WriteBatch batch;
 111   batch.Put(kKey, "[{(.*+\"\'\\");
 112   EXPECT_TRUE(leveldb_store->WriteToDbForTest(&batch));
 113   EXPECT_TRUE(leveldb_store->Get(kKey)->IsCorrupted());
 114
 115   // Running another set should end up working (even though it will restore the
 116   // store behind the scenes).
 117   RunSetFunction(kKey, kValue);
 118   EXPECT_TRUE(RunGetFunction(kKey, &result));
 119   EXPECT_EQ(kValue, result);
 120 }
 121
 122 }  // namespace extensions