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/*
* Copyright 2021 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/system/file_wrapper.h"
#include "rtc_base/checks.h"
#include "test/gtest.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
TEST(FileWrapper, FileSize) {
auto test_info = ::testing::UnitTest::GetInstance()->current_test_info();
std::string test_name =
std::string(test_info->test_case_name()) + "_" + test_info->name();
std::replace(test_name.begin(), test_name.end(), '/', '_');
const std::string temp_filename =
test::OutputPathWithRandomDirectory() + test_name;
// Write
{
FileWrapper file = FileWrapper::OpenWriteOnly(temp_filename);
ASSERT_TRUE(file.is_open());
EXPECT_EQ(file.FileSize(), 0);
EXPECT_TRUE(file.Write("foo", 3));
EXPECT_EQ(file.FileSize(), 3);
// FileSize() doesn't change the file size.
EXPECT_EQ(file.FileSize(), 3);
// FileSize() doesn't move the write position.
EXPECT_TRUE(file.Write("bar", 3));
EXPECT_EQ(file.FileSize(), 6);
}
// Read
{
FileWrapper file = FileWrapper::OpenReadOnly(temp_filename);
ASSERT_TRUE(file.is_open());
EXPECT_EQ(file.FileSize(), 6);
char buf[10];
size_t bytes_read = file.Read(buf, 3);
EXPECT_EQ(bytes_read, 3u);
EXPECT_EQ(memcmp(buf, "foo", 3), 0);
// FileSize() doesn't move the read position.
EXPECT_EQ(file.FileSize(), 6);
// Attempting to read past the end reads what is available
// and sets the EOF flag.
bytes_read = file.Read(buf, 5);
EXPECT_EQ(bytes_read, 3u);
EXPECT_EQ(memcmp(buf, "bar", 3), 0);
EXPECT_TRUE(file.ReadEof());
}
// Clean up temporary file.
remove(temp_filename.c_str());
}
} // namespace webrtc
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