Drive: Removes unused cache files after the initial feed fetch.

chrome/browser/chromeos/gdata/stale_cache_files_remover_unittest.cc

Index: chrome/browser/chromeos/gdata/stale_cache_files_remover_unittest.cc
diff --git a/chrome/browser/chromeos/gdata/stale_cache_files_remover_unittest.cc b/chrome/browser/chromeos/gdata/stale_cache_files_remover_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d8d958d3182ddb1728feef63db716d04b5f15ad3
--- /dev/null
+++ b/chrome/browser/chromeos/gdata/stale_cache_files_remover_unittest.cc
@@ -0,0 +1,225 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/stringprintf.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/gdata/drive.pb.h"
+#include "chrome/browser/chromeos/gdata/drive_api_parser.h"
+#include "chrome/browser/chromeos/gdata/drive_file_system.h"
+#include "chrome/browser/chromeos/gdata/drive_webapps_registry.h"
+#include "chrome/browser/chromeos/gdata/gdata_test_util.h"
+#include "chrome/browser/chromeos/gdata/gdata_uploader.h"
+#include "chrome/browser/chromeos/gdata/gdata_util.h"
+#include "chrome/browser/chromeos/gdata/mock_directory_change_observer.h"
+#include "chrome/browser/chromeos/gdata/mock_drive_cache_observer.h"
+#include "chrome/browser/chromeos/gdata/mock_drive_service.h"
+#include "chrome/browser/chromeos/gdata/mock_drive_web_apps_registry.h"
+#include "chrome/browser/chromeos/gdata/mock_free_disk_space_getter.h"
+#include "chrome/browser/chromeos/gdata/mock_gdata_uploader.h"
+#include "chrome/browser/chromeos/gdata/stale_cache_files_remover.h"
+#include "chrome/test/base/testing_profile.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/test/test_browser_thread.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::AtLeast;
+using ::testing::Eq;
+using ::testing::NotNull;
+using ::testing::Return;
+using ::testing::StrictMock;
+using ::testing::_;
+
+namespace gdata {
+namespace {
+
+const int64 kLotsOfSpace = kMinFreeSpace * 10;
+
+// Callback for DriveCache::StoreOnUIThread used in RemoveStaleCacheFiles test.
+// Verifies that the result is not an error.
+void VerifyCacheFileState(DriveFileError error,
+                          const std::string& resource_id,
+                          const std::string& md5) {
+  EXPECT_EQ(DRIVE_FILE_OK, error);
+}
+
+}  // namespace
+
+class StaleCacheFilesRemoverTest : public testing::Test {
+ protected:
+  StaleCacheFilesRemoverTest()
+      : ui_thread_(content::BrowserThread::UI, &message_loop_),
+        io_thread_(content::BrowserThread::IO),
+        cache_(NULL),
+        file_system_(NULL),
+        mock_drive_service_(NULL),
+        mock_webapps_registry_(NULL),
+        root_feed_changestamp_(0) {
+  }
+
+  virtual void SetUp() OVERRIDE {
+    io_thread_.StartIOThread();
+
+    profile_.reset(new TestingProfile);
+
+    // Allocate and keep a pointer to the mock, and inject it into the
+    // DriveFileSystem object, which will own the mock object.
+    mock_drive_service_ = new StrictMock<MockDriveService>;
+
+    EXPECT_CALL(*mock_drive_service_, Initialize(profile_.get())).Times(1);
+
+    // Likewise, this will be owned by DriveFileSystem.
+    mock_free_disk_space_checker_ = new StrictMock<MockFreeDiskSpaceGetter>;
+    SetFreeDiskSpaceGetterForTesting(mock_free_disk_space_checker_);
+
+    scoped_refptr<base::SequencedWorkerPool> pool =
+        content::BrowserThread::GetBlockingPool();
+    blocking_task_runner_ =
+        pool->GetSequencedTaskRunner(pool->GetSequenceToken());
+
+    cache_ = DriveCache::CreateDriveCacheOnUIThread(
+        DriveCache::GetCacheRootPath(profile_.get()), blocking_task_runner_);
+
+    mock_uploader_.reset(new StrictMock<MockGDataUploader>);
+    mock_webapps_registry_.reset(new StrictMock<MockDriveWebAppsRegistry>);
+
+    ASSERT_FALSE(file_system_);
+    file_system_ = new DriveFileSystem(profile_.get(),
+                                       cache_,
+                                       mock_drive_service_,
+                                       mock_uploader_.get(),
+                                       mock_webapps_registry_.get(),
+                                       blocking_task_runner_);
+
+    mock_cache_observer_.reset(new StrictMock<MockDriveCacheObserver>);
+    cache_->AddObserver(mock_cache_observer_.get());
+
+    mock_directory_observer_.reset(new StrictMock<MockDirectoryChangeObserver>);
+    file_system_->AddObserver(mock_directory_observer_.get());
+
+    file_system_->Initialize();
+    cache_->RequestInitializeOnUIThreadForTesting();
+
+    stale_cache_files_remover_.reset(new StaleCacheFilesRemover(file_system_,
+                                                                cache_));
+
+    test_util::RunBlockingPoolTask();
+  }
+
+  virtual void TearDown() OVERRIDE {
+    ASSERT_TRUE(file_system_);
+    stale_cache_files_remover_.reset();
+    EXPECT_CALL(*mock_drive_service_, CancelAll()).Times(1);
+    delete file_system_;
+    file_system_ = NULL;
+    delete mock_drive_service_;
+    mock_drive_service_ = NULL;
+    SetFreeDiskSpaceGetterForTesting(NULL);
+    cache_->DestroyOnUIThread();
+    // The cache destruction requires to post a task to the blocking pool.
+    test_util::RunBlockingPoolTask();
+
+    profile_.reset(NULL);
+  }
+
+  // Loads test json file as root ("/drive") element.
+  void LoadRootFeedDocument(const std::string& filename) {
+    test_util::LoadChangeFeed(filename,
+                              file_system_,
+                              0,
+                              root_feed_changestamp_++);
+  }
+
+  MessageLoopForUI message_loop_;
+  // The order of the test threads is important, do not change the order.
+  // See also content/browser/browser_thread_impl.cc.
+  content::TestBrowserThread ui_thread_;
+  content::TestBrowserThread io_thread_;
+  scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
+  scoped_ptr<TestingProfile> profile_;
+  DriveCache* cache_;
+  scoped_ptr<StrictMock<MockGDataUploader> > mock_uploader_;
+  DriveFileSystem* file_system_;
+  StrictMock<MockDriveService>* mock_drive_service_;
+  scoped_ptr<StrictMock<MockDriveWebAppsRegistry> > mock_webapps_registry_;
+  StrictMock<MockFreeDiskSpaceGetter>* mock_free_disk_space_checker_;
+  scoped_ptr<StrictMock<MockDriveCacheObserver> > mock_cache_observer_;
+  scoped_ptr<StrictMock<MockDirectoryChangeObserver> > mock_directory_observer_;
+  scoped_ptr<StaleCacheFilesRemover> stale_cache_files_remover_;
+
+  int root_feed_changestamp_;
+};
+
+TEST_F(StaleCacheFilesRemoverTest, RemoveStaleCacheFiles) {
+  FilePath dummy_file = test_util::GetTestFilePath("root_feed.json");
+  std::string resource_id("pdf:1a2b3c");
+  std::string md5("abcdef0123456789");
+
+  EXPECT_CALL(*mock_free_disk_space_checker_, AmountOfFreeDiskSpace())
+      .Times(AtLeast(1)).WillRepeatedly(Return(kLotsOfSpace));
+
+  // Create a stale cache file.
+  cache_->StoreOnUIThread(resource_id, md5, dummy_file,
+                          DriveCache::FILE_OPERATION_COPY,
+                          base::Bind(&gdata::VerifyCacheFileState));
+  test_util::RunBlockingPoolTask();
+
+  // Verify that the cache file exists.
+  FilePath path = cache_->GetCacheFilePath(resource_id,
+                                           md5,
+                                           DriveCache::CACHE_TYPE_TMP,
+                                           DriveCache::CACHED_FILE_FROM_SERVER);
+  EXPECT_TRUE(file_util::PathExists(path));
+
+  // Verify that the corresponding file entry doesn't exist.
+  EXPECT_CALL(*mock_drive_service_, GetAccountMetadata(_)).Times(1);
+  EXPECT_CALL(*mock_drive_service_, GetDocuments(Eq(GURL()), _, "", _, _))
+      .Times(1);
+  EXPECT_CALL(*mock_webapps_registry_, UpdateFromFeed(_)).Times(1);
+
+  DriveFileError error(DRIVE_FILE_OK);
+  FilePath unused;
+  scoped_ptr<DriveEntryProto> entry_proto;
+  file_system_->GetEntryInfoByResourceId(
+      resource_id,
+      base::Bind(&test_util::CopyResultsFromGetEntryInfoWithFilePathCallback,
+                 &error,
+                 &unused,
+                 &entry_proto));
+  test_util::RunBlockingPoolTask();
+  EXPECT_EQ(DRIVE_FILE_ERROR_NOT_FOUND, error);
+
+  file_system_->GetEntryInfoByPath(
+      path,
+      base::Bind(&test_util::CopyResultsFromGetEntryInfoCallback,
+                 &error,
+                 &entry_proto));
+  test_util::RunBlockingPoolTask();
+  EXPECT_EQ(DRIVE_FILE_ERROR_NOT_FOUND, error);
+  EXPECT_FALSE(entry_proto.get());
+
+  // Load a root feed.
+  LoadRootFeedDocument("root_feed.json");
+
+  // Wait for StaleCacheFilesRemover to finish cleaning up the stale file.
+  test_util::RunBlockingPoolTask();
+
+  // Verify that the cache file is deleted.
+  path = cache_->GetCacheFilePath(resource_id,
+                                  md5,
+                                  DriveCache::CACHE_TYPE_TMP,
+                                  DriveCache::CACHED_FILE_FROM_SERVER);
+  EXPECT_FALSE(file_util::PathExists(path));
+}
+
+}   // namespace gdata