blob: dac29566d911cdd2f8396090f67750e948adf7de [file] [log] [blame]
// Copyright (c) 2011 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 "base/file_util.h"
#include "base/memory/scoped_temp_dir.h"
#include "base/platform_file.h"
#include "base/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
// Reads from a file the given number of bytes, or until EOF is reached.
// Returns the number of bytes read.
int ReadFully(base::PlatformFile file, int64 offset, char* data, int size) {
int total_bytes_read = 0;
int bytes_read;
while (total_bytes_read < size) {
bytes_read = base::ReadPlatformFile(
file, offset + total_bytes_read, &data[total_bytes_read],
size - total_bytes_read);
// If we reached EOF, bytes_read will be 0.
if (bytes_read == 0)
return total_bytes_read;
if ((bytes_read < 0) || (bytes_read > size - total_bytes_read))
return -1;
total_bytes_read += bytes_read;
}
return total_bytes_read;
}
// Writes the given number of bytes to a file.
// Returns the number of bytes written.
int WriteFully(base::PlatformFile file, int64 offset,
const char* data, int size) {
int total_bytes_written = 0;
int bytes_written;
while (total_bytes_written < size) {
bytes_written = base::WritePlatformFile(
file, offset + total_bytes_written, &data[total_bytes_written],
size - total_bytes_written);
if ((bytes_written == 0) && (size == 0))
return 0;
if ((bytes_written <= 0) || (bytes_written > size - total_bytes_written))
return -1;
total_bytes_written += bytes_written;
}
return total_bytes_written;
}
} // namespace
TEST(PlatformFile, CreatePlatformFile) {
ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
FilePath file_path = temp_dir.path().AppendASCII("create_file_1");
// Open a file that doesn't exist.
base::PlatformFileError error_code = base::PLATFORM_FILE_OK;
base::PlatformFile file = base::CreatePlatformFile(
file_path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
NULL, &error_code);
EXPECT_EQ(base::kInvalidPlatformFileValue, file);
EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, error_code);
// Open or create a file.
bool created = false;
error_code = base::PLATFORM_FILE_OK;
file = base::CreatePlatformFile(
file_path, base::PLATFORM_FILE_OPEN_ALWAYS | base::PLATFORM_FILE_READ,
&created, &error_code);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
EXPECT_TRUE(created);
EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
base::ClosePlatformFile(file);
// Open an existing file.
created = false;
file = base::CreatePlatformFile(
file_path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
&created, &error_code);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
EXPECT_FALSE(created);
EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
base::ClosePlatformFile(file);
// Create a file that exists.
file = base::CreatePlatformFile(
file_path, base::PLATFORM_FILE_CREATE | base::PLATFORM_FILE_READ,
&created, &error_code);
EXPECT_EQ(base::kInvalidPlatformFileValue, file);
EXPECT_FALSE(created);
EXPECT_EQ(base::PLATFORM_FILE_ERROR_EXISTS, error_code);
// Create or overwrite a file.
error_code = base::PLATFORM_FILE_OK;
file = base::CreatePlatformFile(
file_path, base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_READ,
&created, &error_code);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
EXPECT_TRUE(created);
EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
base::ClosePlatformFile(file);
// Create a delete-on-close file.
created = false;
file_path = temp_dir.path().AppendASCII("create_file_2");
file = base::CreatePlatformFile(
file_path,
base::PLATFORM_FILE_OPEN_ALWAYS |
base::PLATFORM_FILE_DELETE_ON_CLOSE |
base::PLATFORM_FILE_READ,
&created, &error_code);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
EXPECT_TRUE(created);
EXPECT_EQ(base::PLATFORM_FILE_OK, error_code);
EXPECT_TRUE(base::ClosePlatformFile(file));
EXPECT_FALSE(file_util::PathExists(file_path));
}
TEST(PlatformFile, ReadWritePlatformFile) {
ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
FilePath file_path = temp_dir.path().AppendASCII("read_write_file");
base::PlatformFile file = base::CreatePlatformFile(
file_path,
base::PLATFORM_FILE_CREATE |
base::PLATFORM_FILE_READ |
base::PLATFORM_FILE_WRITE,
NULL, NULL);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
char data_to_write[] = "test";
const int kTestDataSize = 4;
// Write 0 bytes to the file.
int bytes_written = WriteFully(file, 0, data_to_write, 0);
EXPECT_EQ(0, bytes_written);
// Write "test" to the file.
bytes_written = WriteFully(file, 0, data_to_write, kTestDataSize);
EXPECT_EQ(kTestDataSize, bytes_written);
// Read from EOF.
char data_read_1[32];
int bytes_read = ReadFully(file, kTestDataSize, data_read_1, kTestDataSize);
EXPECT_EQ(0, bytes_read);
// Read from somewhere in the middle of the file.
const int kPartialReadOffset = 1;
bytes_read = ReadFully(file, kPartialReadOffset, data_read_1, kTestDataSize);
EXPECT_EQ(kTestDataSize - kPartialReadOffset, bytes_read);
for (int i = 0; i < bytes_read; i++)
EXPECT_EQ(data_to_write[i + kPartialReadOffset], data_read_1[i]);
// Read 0 bytes.
bytes_read = ReadFully(file, 0, data_read_1, 0);
EXPECT_EQ(0, bytes_read);
// Read the entire file.
bytes_read = ReadFully(file, 0, data_read_1, kTestDataSize);
EXPECT_EQ(kTestDataSize, bytes_read);
for (int i = 0; i < bytes_read; i++)
EXPECT_EQ(data_to_write[i], data_read_1[i]);
// Write past the end of the file.
const int kOffsetBeyondEndOfFile = 10;
const int kPartialWriteLength = 2;
bytes_written = WriteFully(file, kOffsetBeyondEndOfFile,
data_to_write, kPartialWriteLength);
EXPECT_EQ(kPartialWriteLength, bytes_written);
// Make sure the file was extended.
int64 file_size = 0;
EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size));
EXPECT_EQ(kOffsetBeyondEndOfFile + kPartialWriteLength, file_size);
// Make sure the file was zero-padded.
char data_read_2[32];
bytes_read = ReadFully(file, 0, data_read_2, static_cast<int>(file_size));
EXPECT_EQ(file_size, bytes_read);
for (int i = 0; i < kTestDataSize; i++)
EXPECT_EQ(data_to_write[i], data_read_2[i]);
for (int i = kTestDataSize; i < kOffsetBeyondEndOfFile; i++)
EXPECT_EQ(0, data_read_2[i]);
for (int i = kOffsetBeyondEndOfFile; i < file_size; i++)
EXPECT_EQ(data_to_write[i - kOffsetBeyondEndOfFile], data_read_2[i]);
// Close the file handle to allow the temp directory to be deleted.
base::ClosePlatformFile(file);
}
TEST(PlatformFile, TruncatePlatformFile) {
ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
FilePath file_path = temp_dir.path().AppendASCII("truncate_file");
base::PlatformFile file = base::CreatePlatformFile(
file_path,
base::PLATFORM_FILE_CREATE |
base::PLATFORM_FILE_READ |
base::PLATFORM_FILE_WRITE,
NULL, NULL);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
// Write "test" to the file.
char data_to_write[] = "test";
int kTestDataSize = 4;
int bytes_written = WriteFully(file, 0, data_to_write, kTestDataSize);
EXPECT_EQ(kTestDataSize, bytes_written);
// Extend the file.
const int kExtendedFileLength = 10;
int64 file_size = 0;
EXPECT_TRUE(base::TruncatePlatformFile(file, kExtendedFileLength));
EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size));
EXPECT_EQ(kExtendedFileLength, file_size);
// Make sure the file was zero-padded.
char data_read[32];
int bytes_read = ReadFully(file, 0, data_read, static_cast<int>(file_size));
EXPECT_EQ(file_size, bytes_read);
for (int i = 0; i < kTestDataSize; i++)
EXPECT_EQ(data_to_write[i], data_read[i]);
for (int i = kTestDataSize; i < file_size; i++)
EXPECT_EQ(0, data_read[i]);
// Truncate the file.
const int kTruncatedFileLength = 2;
EXPECT_TRUE(base::TruncatePlatformFile(file, kTruncatedFileLength));
EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size));
EXPECT_EQ(kTruncatedFileLength, file_size);
// Make sure the file was truncated.
bytes_read = ReadFully(file, 0, data_read, kTestDataSize);
EXPECT_EQ(file_size, bytes_read);
for (int i = 0; i < file_size; i++)
EXPECT_EQ(data_to_write[i], data_read[i]);
// Close the file handle to allow the temp directory to be deleted.
base::ClosePlatformFile(file);
}
TEST(PlatformFile, TouchGetInfoPlatformFile) {
ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
base::PlatformFile file = base::CreatePlatformFile(
temp_dir.path().AppendASCII("touch_get_info_file"),
base::PLATFORM_FILE_CREATE |
base::PLATFORM_FILE_WRITE |
base::PLATFORM_FILE_WRITE_ATTRIBUTES,
NULL, NULL);
EXPECT_NE(base::kInvalidPlatformFileValue, file);
// Get info for a newly created file.
base::PlatformFileInfo info;
EXPECT_TRUE(base::GetPlatformFileInfo(file, &info));
// Add 2 seconds to account for possible rounding errors on
// filesystems that use a 1s or 2s timestamp granularity.
base::Time now = base::Time::Now() + base::TimeDelta::FromSeconds(2);
EXPECT_EQ(0, info.size);
EXPECT_FALSE(info.is_directory);
EXPECT_FALSE(info.is_symbolic_link);
EXPECT_LE(info.last_accessed.ToInternalValue(), now.ToInternalValue());
EXPECT_LE(info.last_modified.ToInternalValue(), now.ToInternalValue());
EXPECT_LE(info.creation_time.ToInternalValue(), now.ToInternalValue());
base::Time creation_time = info.creation_time;
// Write "test" to the file.
char data[] = "test";
const int kTestDataSize = 4;
int bytes_written = WriteFully(file, 0, data, kTestDataSize);
EXPECT_EQ(kTestDataSize, bytes_written);
// Change the last_accessed and last_modified dates.
// It's best to add values that are multiples of 2 (in seconds)
// to the current last_accessed and last_modified times, because
// FATxx uses a 2s timestamp granularity.
base::Time new_last_accessed =
info.last_accessed + base::TimeDelta::FromSeconds(234);
base::Time new_last_modified =
info.last_modified + base::TimeDelta::FromMinutes(567);
EXPECT_TRUE(base::TouchPlatformFile(file, new_last_accessed,
new_last_modified));
// Make sure the file info was updated accordingly.
EXPECT_TRUE(base::GetPlatformFileInfo(file, &info));
EXPECT_EQ(info.size, kTestDataSize);
EXPECT_FALSE(info.is_directory);
EXPECT_FALSE(info.is_symbolic_link);
// ext2/ext3 and HPS/HPS+ seem to have a timestamp granularity of 1s.
#if defined(OS_POSIX)
EXPECT_EQ(info.last_accessed.ToTimeVal().tv_sec,
new_last_accessed.ToTimeVal().tv_sec);
EXPECT_EQ(info.last_modified.ToTimeVal().tv_sec,
new_last_modified.ToTimeVal().tv_sec);
#else
EXPECT_EQ(info.last_accessed.ToInternalValue(),
new_last_accessed.ToInternalValue());
EXPECT_EQ(info.last_modified.ToInternalValue(),
new_last_modified.ToInternalValue());
#endif
EXPECT_EQ(info.creation_time.ToInternalValue(),
creation_time.ToInternalValue());
// Close the file handle to allow the temp directory to be deleted.
base::ClosePlatformFile(file);
}