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 "content/browser/fileapi/sandbox_database_test_helper.h"
6
7#include <algorithm>
8#include <functional>
9#include <vector>
10
11#include "base/files/file.h"
12#include "base/files/file_enumerator.h"
13#include "base/files/file_util.h"
14#include "base/stl_util.h"
15#include "storage/common/fileapi/file_system_util.h"
16#include "testing/gtest/include/gtest/gtest.h"
17
18using storage::FilePathToString;
19
20namespace content {
21
22void CorruptDatabase(const base::FilePath& db_path,
23                     leveldb::FileType type,
24                     ptrdiff_t offset,
25                     size_t size) {
26  base::FileEnumerator file_enum(db_path, false /* not recursive */,
27      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
28  base::FilePath file_path;
29  base::FilePath picked_file_path;
30  uint64 picked_file_number = kuint64max;
31
32  while (!(file_path = file_enum.Next()).empty()) {
33    uint64 number = kuint64max;
34    leveldb::FileType file_type;
35    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
36                                       &number, &file_type));
37    if (file_type == type &&
38        (picked_file_number == kuint64max || picked_file_number < number)) {
39      picked_file_path = file_path;
40      picked_file_number = number;
41    }
42  }
43
44  EXPECT_FALSE(picked_file_path.empty());
45  EXPECT_NE(kuint64max, picked_file_number);
46
47  base::File file(picked_file_path,
48                  base::File::FLAG_OPEN | base::File::FLAG_READ |
49                      base::File::FLAG_WRITE);
50  ASSERT_TRUE(file.IsValid());
51  EXPECT_FALSE(file.created());
52
53  base::File::Info file_info;
54  EXPECT_TRUE(file.GetInfo(&file_info));
55  if (offset < 0)
56    offset += file_info.size;
57  EXPECT_GE(offset, 0);
58  EXPECT_LE(offset, file_info.size);
59
60  size = std::min(size, static_cast<size_t>(file_info.size - offset));
61
62  std::vector<char> buf(size);
63  int read_size = file.Read(offset, vector_as_array(&buf), buf.size());
64  EXPECT_LT(0, read_size);
65  EXPECT_GE(buf.size(), static_cast<size_t>(read_size));
66  buf.resize(read_size);
67
68  std::transform(buf.begin(), buf.end(), buf.begin(),
69                 std::logical_not<char>());
70
71  int written_size = file.Write(offset, vector_as_array(&buf), buf.size());
72  EXPECT_GT(written_size, 0);
73  EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
74}
75
76void DeleteDatabaseFile(const base::FilePath& db_path,
77                        leveldb::FileType type) {
78  base::FileEnumerator file_enum(db_path, false /* not recursive */,
79      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
80  base::FilePath file_path;
81  while (!(file_path = file_enum.Next()).empty()) {
82    uint64 number = kuint64max;
83    leveldb::FileType file_type;
84    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
85                                       &number, &file_type));
86    if (file_type == type) {
87      base::DeleteFile(file_path, false);
88      // We may have multiple files for the same type, so don't break here.
89    }
90  }
91}
92
93}  // namespace content
94