1ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen// Copyright (c) 2011 The Chromium Authors. All rights reserved. 23345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Use of this source code is governed by a BSD-style license that can be 33345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// found in the LICENSE file. 43345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 53345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "base/file_util.h" 6ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen#include "base/memory/scoped_temp_dir.h" 73345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "base/platform_file.h" 83345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "base/time.h" 93345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "testing/gtest/include/gtest/gtest.h" 103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merricknamespace { 123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Reads from a file the given number of bytes, or until EOF is reached. 143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Returns the number of bytes read. 153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickint ReadFully(base::PlatformFile file, int64 offset, char* data, int size) { 163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int total_bytes_read = 0; 173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_read; 183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick while (total_bytes_read < size) { 193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = base::ReadPlatformFile( 203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file, offset + total_bytes_read, &data[total_bytes_read], 213345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick size - total_bytes_read); 223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // If we reached EOF, bytes_read will be 0. 243345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (bytes_read == 0) 253345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return total_bytes_read; 263345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 273345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if ((bytes_read < 0) || (bytes_read > size - total_bytes_read)) 283345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return -1; 293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 303345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick total_bytes_read += bytes_read; 313345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 323345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 333345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return total_bytes_read; 343345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 353345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 363345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Writes the given number of bytes to a file. 373345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Returns the number of bytes written. 383345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickint WriteFully(base::PlatformFile file, int64 offset, 393345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const char* data, int size) { 403345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int total_bytes_written = 0; 413345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_written; 423345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick while (total_bytes_written < size) { 433345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_written = base::WritePlatformFile( 443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file, offset + total_bytes_written, &data[total_bytes_written], 453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick size - total_bytes_written); 463345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 473345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if ((bytes_written == 0) && (size == 0)) 483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return 0; 493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if ((bytes_written <= 0) || (bytes_written > size - total_bytes_written)) 513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return -1; 523345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick total_bytes_written += bytes_written; 543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return total_bytes_written; 573345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} // namespace 603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 613345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickTEST(PlatformFile, CreatePlatformFile) { 623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ScopedTempDir temp_dir; 633345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); 643345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick FilePath file_path = temp_dir.path().AppendASCII("create_file_1"); 653345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 663345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Open a file that doesn't exist. 673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFileError error_code = base::PLATFORM_FILE_OK; 683345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFile file = base::CreatePlatformFile( 693345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ, 703345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick NULL, &error_code); 713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::kInvalidPlatformFileValue, file); 723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, error_code); 733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Open or create a file. 753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bool created = false; 763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick error_code = base::PLATFORM_FILE_OK; 773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file = base::CreatePlatformFile( 783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, base::PLATFORM_FILE_OPEN_ALWAYS | base::PLATFORM_FILE_READ, 793345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick &created, &error_code); 803345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 813345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(created); 823345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_OK, error_code); 833345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 843345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 853345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Open an existing file. 863345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick created = false; 873345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file = base::CreatePlatformFile( 883345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ, 893345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick &created, &error_code); 903345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 913345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_FALSE(created); 923345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_OK, error_code); 933345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Create a file that exists. 963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file = base::CreatePlatformFile( 973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, base::PLATFORM_FILE_CREATE | base::PLATFORM_FILE_READ, 983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick &created, &error_code); 993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::kInvalidPlatformFileValue, file); 1003345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_FALSE(created); 1013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_ERROR_EXISTS, error_code); 1023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Create or overwrite a file. 1043345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick error_code = base::PLATFORM_FILE_OK; 1053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file = base::CreatePlatformFile( 1063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_READ, 1073345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick &created, &error_code); 1083345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 1093345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(created); 1103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_OK, error_code); 1113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 1123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Create a delete-on-close file. 1143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick created = false; 1153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path = temp_dir.path().AppendASCII("create_file_2"); 1163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file = base::CreatePlatformFile( 1173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, 1183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_OPEN_ALWAYS | 1193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_DELETE_ON_CLOSE | 1203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_READ, 1213345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick &created, &error_code); 1223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 1233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(created); 1243345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(base::PLATFORM_FILE_OK, error_code); 1253345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1263345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::ClosePlatformFile(file)); 1273345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_FALSE(file_util::PathExists(file_path)); 1283345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1303345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickTEST(PlatformFile, ReadWritePlatformFile) { 1313345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ScopedTempDir temp_dir; 1323345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); 1333345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick FilePath file_path = temp_dir.path().AppendASCII("read_write_file"); 1343345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFile file = base::CreatePlatformFile( 1353345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, 1363345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_CREATE | 1373345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_READ | 1383345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_WRITE, 1393345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick NULL, NULL); 1403345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 1413345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1423345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data_to_write[] = "test"; 1433345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kTestDataSize = 4; 1443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Write 0 bytes to the file. 1463345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_written = WriteFully(file, 0, data_to_write, 0); 1473345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, bytes_written); 1483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Write "test" to the file. 1503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_written = WriteFully(file, 0, data_to_write, kTestDataSize); 1513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTestDataSize, bytes_written); 1523345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Read from EOF. 1543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data_read_1[32]; 1553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_read = ReadFully(file, kTestDataSize, data_read_1, kTestDataSize); 1563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, bytes_read); 1573345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Read from somewhere in the middle of the file. 1593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kPartialReadOffset = 1; 1603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = ReadFully(file, kPartialReadOffset, data_read_1, kTestDataSize); 1613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTestDataSize - kPartialReadOffset, bytes_read); 1623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = 0; i < bytes_read; i++) 1633345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i + kPartialReadOffset], data_read_1[i]); 1643345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1653345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Read 0 bytes. 1663345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = ReadFully(file, 0, data_read_1, 0); 1673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, bytes_read); 1683345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1693345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Read the entire file. 1703345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = ReadFully(file, 0, data_read_1, kTestDataSize); 1713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTestDataSize, bytes_read); 1723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = 0; i < bytes_read; i++) 1733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i], data_read_1[i]); 1743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Write past the end of the file. 1763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kOffsetBeyondEndOfFile = 10; 1773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kPartialWriteLength = 2; 1783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_written = WriteFully(file, kOffsetBeyondEndOfFile, 1793345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick data_to_write, kPartialWriteLength); 1803345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kPartialWriteLength, bytes_written); 1813345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1823345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Make sure the file was extended. 1833345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int64 file_size = 0; 1843345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size)); 1853345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kOffsetBeyondEndOfFile + kPartialWriteLength, file_size); 1863345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1873345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Make sure the file was zero-padded. 1883345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data_read_2[32]; 1893345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = ReadFully(file, 0, data_read_2, static_cast<int>(file_size)); 1903345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(file_size, bytes_read); 1913345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = 0; i < kTestDataSize; i++) 1923345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i], data_read_2[i]); 1933345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = kTestDataSize; i < kOffsetBeyondEndOfFile; i++) 1943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, data_read_2[i]); 1953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = kOffsetBeyondEndOfFile; i < file_size; i++) 1963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i - kOffsetBeyondEndOfFile], data_read_2[i]); 1973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Close the file handle to allow the temp directory to be deleted. 1993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 2003345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 2013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2023345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickTEST(PlatformFile, TruncatePlatformFile) { 2033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ScopedTempDir temp_dir; 2043345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); 2053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick FilePath file_path = temp_dir.path().AppendASCII("truncate_file"); 2063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFile file = base::CreatePlatformFile( 2073345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick file_path, 2083345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_CREATE | 2093345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_READ | 2103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_WRITE, 2113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick NULL, NULL); 2123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 2133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Write "test" to the file. 2153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data_to_write[] = "test"; 2163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int kTestDataSize = 4; 2173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_written = WriteFully(file, 0, data_to_write, kTestDataSize); 2183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTestDataSize, bytes_written); 2193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Extend the file. 2213345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kExtendedFileLength = 10; 2223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int64 file_size = 0; 2233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::TruncatePlatformFile(file, kExtendedFileLength)); 2243345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size)); 2253345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kExtendedFileLength, file_size); 2263345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2273345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Make sure the file was zero-padded. 2283345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data_read[32]; 2293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_read = ReadFully(file, 0, data_read, static_cast<int>(file_size)); 2303345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(file_size, bytes_read); 2313345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = 0; i < kTestDataSize; i++) 2323345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i], data_read[i]); 2333345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = kTestDataSize; i < file_size; i++) 2343345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, data_read[i]); 2353345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2363345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Truncate the file. 2373345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kTruncatedFileLength = 2; 2383345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::TruncatePlatformFile(file, kTruncatedFileLength)); 2393345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(file_util::GetFileSize(file_path, &file_size)); 2403345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTruncatedFileLength, file_size); 2413345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2423345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Make sure the file was truncated. 2433345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bytes_read = ReadFully(file, 0, data_read, kTestDataSize); 2443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(file_size, bytes_read); 2453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (int i = 0; i < file_size; i++) 2463345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(data_to_write[i], data_read[i]); 2473345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Close the file handle to allow the temp directory to be deleted. 2493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 2503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 2513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2523345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickTEST(PlatformFile, TouchGetInfoPlatformFile) { 2533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ScopedTempDir temp_dir; 2543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); 2553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFile file = base::CreatePlatformFile( 2563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick temp_dir.path().AppendASCII("touch_get_info_file"), 2573345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_CREATE | 2583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_WRITE | 2593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PLATFORM_FILE_WRITE_ATTRIBUTES, 2603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick NULL, NULL); 2613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_NE(base::kInvalidPlatformFileValue, file); 2623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2633345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Get info for a newly created file. 2643345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::PlatformFileInfo info; 2653345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::GetPlatformFileInfo(file, &info)); 2663345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Add 2 seconds to account for possible rounding errors on 2683345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // filesystems that use a 1s or 2s timestamp granularity. 2693345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::Time now = base::Time::Now() + base::TimeDelta::FromSeconds(2); 2703345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(0, info.size); 2713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_FALSE(info.is_directory); 272201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch EXPECT_FALSE(info.is_symbolic_link); 2733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_LE(info.last_accessed.ToInternalValue(), now.ToInternalValue()); 2743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_LE(info.last_modified.ToInternalValue(), now.ToInternalValue()); 2753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_LE(info.creation_time.ToInternalValue(), now.ToInternalValue()); 2763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::Time creation_time = info.creation_time; 2773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Write "test" to the file. 2793345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick char data[] = "test"; 2803345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kTestDataSize = 4; 2813345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int bytes_written = WriteFully(file, 0, data, kTestDataSize); 2823345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(kTestDataSize, bytes_written); 2833345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2843345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Change the last_accessed and last_modified dates. 2853345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // It's best to add values that are multiples of 2 (in seconds) 2863345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // to the current last_accessed and last_modified times, because 2873345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // FATxx uses a 2s timestamp granularity. 2883345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::Time new_last_accessed = 2893345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick info.last_accessed + base::TimeDelta::FromSeconds(234); 2903345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::Time new_last_modified = 2913345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick info.last_modified + base::TimeDelta::FromMinutes(567); 2923345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2933345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::TouchPlatformFile(file, new_last_accessed, 2943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_last_modified)); 2953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Make sure the file info was updated accordingly. 2973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_TRUE(base::GetPlatformFileInfo(file, &info)); 2983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.size, kTestDataSize); 2993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_FALSE(info.is_directory); 300201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch EXPECT_FALSE(info.is_symbolic_link); 3013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 3023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // ext2/ext3 and HPS/HPS+ seem to have a timestamp granularity of 1s. 3033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#if defined(OS_POSIX) 3043345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.last_accessed.ToTimeVal().tv_sec, 3053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_last_accessed.ToTimeVal().tv_sec); 3063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.last_modified.ToTimeVal().tv_sec, 3073345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_last_modified.ToTimeVal().tv_sec); 3083345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#else 3093345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.last_accessed.ToInternalValue(), 3103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_last_accessed.ToInternalValue()); 3113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.last_modified.ToInternalValue(), 3123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_last_modified.ToInternalValue()); 3133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#endif 3143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 3153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EXPECT_EQ(info.creation_time.ToInternalValue(), 3163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick creation_time.ToInternalValue()); 3173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 3183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Close the file handle to allow the temp directory to be deleted. 3193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::ClosePlatformFile(file); 3203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 321