1// Copyright (c) 2012 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 "webkit/browser/fileapi/sandbox_database_test_helper.h"
6
7#include <algorithm>
8#include <functional>
9#include <vector>
10
11#include "base/file_util.h"
12#include "base/files/file_enumerator.h"
13#include "base/stl_util.h"
14#include "testing/gtest/include/gtest/gtest.h"
15#include "webkit/common/fileapi/file_system_util.h"
16
17namespace fileapi {
18
19void CorruptDatabase(const base::FilePath& db_path,
20                     leveldb::FileType type,
21                     ptrdiff_t offset,
22                     size_t size) {
23  base::FileEnumerator file_enum(db_path, false /* not recursive */,
24      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
25  base::FilePath file_path;
26  base::FilePath picked_file_path;
27  uint64 picked_file_number = kuint64max;
28
29  while (!(file_path = file_enum.Next()).empty()) {
30    uint64 number = kuint64max;
31    leveldb::FileType file_type;
32    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
33                                       &number, &file_type));
34    if (file_type == type &&
35        (picked_file_number == kuint64max || picked_file_number < number)) {
36      picked_file_path = file_path;
37      picked_file_number = number;
38    }
39  }
40
41  EXPECT_FALSE(picked_file_path.empty());
42  EXPECT_NE(kuint64max, picked_file_number);
43
44  bool created = true;
45  base::PlatformFileError error = base::PLATFORM_FILE_ERROR_FAILED;
46  base::PlatformFile file =
47      CreatePlatformFile(picked_file_path,
48                         base::PLATFORM_FILE_OPEN |
49                         base::PLATFORM_FILE_READ |
50                         base::PLATFORM_FILE_WRITE,
51                         &created, &error);
52  EXPECT_EQ(base::PLATFORM_FILE_OK, error);
53  EXPECT_FALSE(created);
54
55  base::PlatformFileInfo file_info;
56  EXPECT_TRUE(base::GetPlatformFileInfo(file, &file_info));
57  if (offset < 0)
58    offset += file_info.size;
59  EXPECT_GE(offset, 0);
60  EXPECT_LE(offset, file_info.size);
61
62  size = std::min(size, static_cast<size_t>(file_info.size - offset));
63
64  std::vector<char> buf(size);
65  int read_size = base::ReadPlatformFile(file, offset,
66                                         vector_as_array(&buf), buf.size());
67  EXPECT_LT(0, read_size);
68  EXPECT_GE(buf.size(), static_cast<size_t>(read_size));
69  buf.resize(read_size);
70
71  std::transform(buf.begin(), buf.end(), buf.begin(),
72                 std::logical_not<char>());
73
74  int written_size = base::WritePlatformFile(file, offset,
75                                             vector_as_array(&buf), buf.size());
76  EXPECT_GT(written_size, 0);
77  EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
78
79  base::ClosePlatformFile(file);
80}
81
82void DeleteDatabaseFile(const base::FilePath& db_path,
83                        leveldb::FileType type) {
84  base::FileEnumerator file_enum(db_path, false /* not recursive */,
85      base::FileEnumerator::DIRECTORIES | base::FileEnumerator::FILES);
86  base::FilePath file_path;
87  while (!(file_path = file_enum.Next()).empty()) {
88    uint64 number = kuint64max;
89    leveldb::FileType file_type;
90    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
91                                       &number, &file_type));
92    if (file_type == type) {
93      base::DeleteFile(file_path, false);
94      // We may have multiple files for the same type, so don't break here.
95    }
96  }
97
98}
99
100}  // namespace fileapi
101