drive: FileCache::Store marks the entry as dirty if empty MD5 is given

chrome/browser/chromeos/drive/remove_stale_cache_files_unittest.cc

 // 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 "base/callback_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/fake_free_disk_space_getter.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/remove_stale_cache_files.h"
 #include "chrome/browser/chromeos/drive/resource_metadata.h"
@@ skipping 64 matching lines @@
   // Verify that the cache entry is deleted.
   EXPECT_FALSE(cache_->GetCacheEntry(local_id, &cache_entry));
 }
 
 TEST_F(RemoveStaleCacheFilesTest, DirtyCacheFiles) {
   base::FilePath dummy_file;
   ASSERT_TRUE(base::CreateTemporaryFileInDir(temp_dir_.path(), &dummy_file));
 
   // Dirty and deleted (= absent in resource_metada) cache entry.
   std::string local_id_1("file:1");
-  std::string md5_1("abcdef0123456789");
   EXPECT_EQ(FILE_ERROR_OK,
-            cache_->Store(local_id_1, md5_1, dummy_file,
+            cache_->Store(local_id_1, std::string(), dummy_file,
                           FileCache::FILE_OPERATION_COPY));
-  scoped_ptr<base::ScopedClosureRunner> file_closer;
-  EXPECT_EQ(FILE_ERROR_OK, cache_->OpenForWrite(local_id_1, &file_closer));
 
   // Dirty and mismatching-MD5 entry.
   std::string md5_2_cache("0123456789abcdef");
   std::string md5_2_metadata("abcdef0123456789");
 
   ResourceEntry entry;
   std::string local_id_2;
   entry.set_resource_id("resource_id");
   entry.mutable_file_specific_info()->set_md5(md5_2_metadata);
   entry.set_parent_local_id(util::kDriveGrandRootLocalId);
   entry.set_title("file.txt");
   resource_metadata_->AddEntry(entry, &local_id_2);
 
   EXPECT_EQ(FILE_ERROR_OK,
-            cache_->Store(local_id_2, md5_2_cache, dummy_file,
+            cache_->Store(local_id_2, std::string(), dummy_file,
                           FileCache::FILE_OPERATION_COPY));
-  EXPECT_EQ(FILE_ERROR_OK, cache_->OpenForWrite(local_id_2, &file_closer));
 
   // Remove stale cache files.
   RemoveStaleCacheFiles(cache_.get(), resource_metadata_.get());
 
   // Dirty cache should be removed if and only if the entry does not exist in
   // resource_metadata.
   FileCacheEntry cache_entry;
   EXPECT_FALSE(cache_->GetCacheEntry(local_id_1, &cache_entry));
   EXPECT_TRUE(cache_->GetCacheEntry(local_id_2, &cache_entry));
 }
 
 }  // namespace internal
 }  // namespace drive