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// 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 "webkit/fileapi/file_system_database_test_helper.h"
#include <algorithm>
#include <functional>
#include <vector>
#include "base/file_util.h"
#include "base/stl_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webkit/fileapi/file_system_util.h"
namespace fileapi {
void CorruptDatabase(const base::FilePath& db_path,
leveldb::FileType type,
ptrdiff_t offset,
size_t size) {
file_util::FileEnumerator file_enum(db_path, false /* not recursive */,
file_util::FileEnumerator::DIRECTORIES |
file_util::FileEnumerator::FILES);
base::FilePath file_path;
base::FilePath picked_file_path;
uint64 picked_file_number = kuint64max;
while (!(file_path = file_enum.Next()).empty()) {
uint64 number = kuint64max;
leveldb::FileType file_type;
EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
&number, &file_type));
if (file_type == type &&
(picked_file_number == kuint64max || picked_file_number < number)) {
picked_file_path = file_path;
picked_file_number = number;
}
}
EXPECT_FALSE(picked_file_path.empty());
EXPECT_NE(kuint64max, picked_file_number);
bool created = true;
base::PlatformFileError error = base::PLATFORM_FILE_ERROR_FAILED;
base::PlatformFile file =
CreatePlatformFile(picked_file_path,
base::PLATFORM_FILE_OPEN |
base::PLATFORM_FILE_READ |
base::PLATFORM_FILE_WRITE,
&created, &error);
EXPECT_EQ(base::PLATFORM_FILE_OK, error);
EXPECT_FALSE(created);
base::PlatformFileInfo file_info;
EXPECT_TRUE(base::GetPlatformFileInfo(file, &file_info));
if (offset < 0)
offset += file_info.size;
EXPECT_GE(offset, 0);
EXPECT_LE(offset, file_info.size);
size = std::min(size, static_cast<size_t>(file_info.size - offset));
std::vector<char> buf(size);
int read_size = base::ReadPlatformFile(file, offset,
vector_as_array(&buf), buf.size());
EXPECT_LT(0, read_size);
EXPECT_GE(buf.size(), static_cast<size_t>(read_size));
buf.resize(read_size);
std::transform(buf.begin(), buf.end(), buf.begin(),
std::logical_not<char>());
int written_size = base::WritePlatformFile(file, offset,
vector_as_array(&buf), buf.size());
EXPECT_GT(written_size, 0);
EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
base::ClosePlatformFile(file);
}
} // namespace fileapi
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