Populate storage_unittests target.

content/browser/fileapi/sandbox_database_test_helper.cc

-// Copyright 2014 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 "content/browser/fileapi/sandbox_database_test_helper.h"
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <functional>
-#include <limits>
-#include <vector>
-
-#include "base/files/file.h"
-#include "base/files/file_enumerator.h"
-#include "base/files/file_util.h"
-#include "storage/common/fileapi/file_system_util.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using storage::FilePathToString;
-
-namespace content {
-
-void CorruptDatabase(const base::FilePath& db_path,
-                     leveldb::FileType type,
-                     ptrdiff_t offset,
-                     size_t size) {
-  base::FileEnumerator file_enum(db_path, false /* not recursive */,
-      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
-  base::FilePath file_path;
-  base::FilePath picked_file_path;
-  uint64_t picked_file_number = std::numeric_limits<uint64_t>::max();
-
-  while (!(file_path = file_enum.Next()).empty()) {
-    uint64_t number = std::numeric_limits<uint64_t>::max();
-    leveldb::FileType file_type;
-    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
-                                       &number, &file_type));
-    if (file_type == type &&
-        (picked_file_number == std::numeric_limits<uint64_t>::max() ||
-         picked_file_number < number)) {
-      picked_file_path = file_path;
-      picked_file_number = number;
-    }
-  }
-
-  EXPECT_FALSE(picked_file_path.empty());
-  EXPECT_NE(std::numeric_limits<uint64_t>::max(), picked_file_number);
-
-  base::File file(picked_file_path,
-                  base::File::FLAG_OPEN | base::File::FLAG_READ |
-                      base::File::FLAG_WRITE);
-  ASSERT_TRUE(file.IsValid());
-  EXPECT_FALSE(file.created());
-
-  base::File::Info file_info;
-  EXPECT_TRUE(file.GetInfo(&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 = file.Read(offset, buf.data(), 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 = file.Write(offset, buf.data(), buf.size());
-  EXPECT_GT(written_size, 0);
-  EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
-}
-
-void DeleteDatabaseFile(const base::FilePath& db_path,
-                        leveldb::FileType type) {
-  base::FileEnumerator file_enum(db_path, false /* not recursive */,
-      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
-  base::FilePath file_path;
-  while (!(file_path = file_enum.Next()).empty()) {
-    uint64_t number = std::numeric_limits<uint64_t>::max();
-    leveldb::FileType file_type;
-    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
-                                       &number, &file_type));
-    if (file_type == type) {
-      base::DeleteFile(file_path, false);
-      // We may have multiple files for the same type, so don't break here.
-    }
-  }
-}
-
-}  // namespace content