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