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 #ifndef BASE_TEST_TEST_FILE_UTIL_H_ 6 #define BASE_TEST_TEST_FILE_UTIL_H_ 7 8 // File utility functions used only by tests. 9 10 #include <string> 11 12 #include "base/compiler_specific.h" 13 #include "base/files/file_path.h" 14 15 namespace base { 16 17 class FilePath; 18 19 // Clear a specific file from the system cache like EvictFileFromSystemCache, 20 // but on failure it will sleep and retry. On the Windows buildbots, eviction 21 // can fail if the file is marked in use, and this will throw off timings that 22 // rely on uncached files. 23 bool EvictFileFromSystemCacheWithRetry(const FilePath& file); 24 25 } // namespace base 26 27 // TODO(brettw) move all of this to the base namespace. 28 namespace file_util { 29 30 // Wrapper over base::Delete. On Windows repeatedly invokes Delete in case 31 // of failure to workaround Windows file locking semantics. Returns true on 32 // success. 33 bool DieFileDie(const base::FilePath& file, bool recurse); 34 35 // Clear a specific file from the system cache. After this call, trying 36 // to access this file will result in a cold load from the hard drive. 37 bool EvictFileFromSystemCache(const base::FilePath& file); 38 39 #if defined(OS_WIN) 40 // Returns true if the volume supports Alternate Data Streams. 41 bool VolumeSupportsADS(const base::FilePath& path); 42 43 // Returns true if the ZoneIdentifier is correctly set to "Internet" (3). 44 // Note that this function must be called from the same process as 45 // the one that set the zone identifier. I.e. don't use it in UI/automation 46 // based tests. 47 bool HasInternetZoneIdentifier(const base::FilePath& full_path); 48 #endif // defined(OS_WIN) 49 50 // In general it's not reliable to convert a FilePath to a wstring and we use 51 // string16 elsewhere for Unicode strings, but in tests it is frequently 52 // convenient to be able to compare paths to literals like L"foobar". 53 std::wstring FilePathAsWString(const base::FilePath& path); 54 base::FilePath WStringAsFilePath(const std::wstring& path); 55 56 // For testing, make the file unreadable or unwritable. 57 // In POSIX, this does not apply to the root user. 58 bool MakeFileUnreadable(const base::FilePath& path) WARN_UNUSED_RESULT; 59 bool MakeFileUnwritable(const base::FilePath& path) WARN_UNUSED_RESULT; 60 61 // Saves the current permissions for a path, and restores it on destruction. 62 class PermissionRestorer { 63 public: 64 explicit PermissionRestorer(const base::FilePath& path); 65 ~PermissionRestorer(); 66 67 private: 68 const base::FilePath path_; 69 void* info_; // The opaque stored permission information. 70 size_t length_; // The length of the stored permission information. 71 72 DISALLOW_COPY_AND_ASSIGN(PermissionRestorer); 73 }; 74 75 } // namespace file_util 76 77 #endif // BASE_TEST_TEST_FILE_UTIL_H_ 78
