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/*
* Copyright 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#undef LOG_TAG
#define LOG_TAG "TransactionTraceWriterTest"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <log/log.h>
#include <filesystem>
#include "TestableSurfaceFlinger.h"
namespace android {
class TransactionTraceWriterTest : public testing::Test {
protected:
std::string mFilename = "/data/local/tmp/testfile_transaction_trace.winscope";
void SetUp() { mFlinger.initTransactionTraceWriter(); }
void TearDown() { std::filesystem::remove(mFilename); }
void verifyTraceFile() {
std::fstream file(mFilename, std::ios::in);
ASSERT_TRUE(file.is_open());
std::string line;
char magicNumber[8];
file.read(magicNumber, 8);
EXPECT_EQ("\tTNXTRAC", std::string(magicNumber, magicNumber + 8));
}
TestableSurfaceFlinger mFlinger;
};
// Check that a new file is written if overwrite=true and no file exists.
TEST_F(TransactionTraceWriterTest, canWriteToFile_overwriteTrue) {
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ true);
EXPECT_EQ(access(mFilename.c_str(), F_OK), 0);
verifyTraceFile();
}
// Check that a new file is written if overwrite=false and no file exists.
TEST_F(TransactionTraceWriterTest, canWriteToFile_overwriteFalse) {
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ false);
EXPECT_EQ(access(mFilename.c_str(), F_OK), 0);
verifyTraceFile();
}
// Check that an existing file is overwritten when overwrite=true.
TEST_F(TransactionTraceWriterTest, canOverwriteFile) {
std::string testLine = "test";
{
std::ofstream file(mFilename, std::ios::out);
file << testLine;
}
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ true);
verifyTraceFile();
}
// Check that an existing file isn't overwritten when it is new and overwrite=false.
TEST_F(TransactionTraceWriterTest, doNotOverwriteFile) {
std::string testLine = "test";
{
std::ofstream file(mFilename, std::ios::out);
file << testLine;
}
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ false);
{
std::fstream file(mFilename, std::ios::in);
ASSERT_TRUE(file.is_open());
std::string line;
std::getline(file, line);
EXPECT_EQ(line, testLine);
}
}
// Check that an existing file is overwritten when it is old and overwrite=false.
TEST_F(TransactionTraceWriterTest, overwriteOldFile) {
std::string testLine = "test";
{
std::ofstream file(mFilename, std::ios::out);
file << testLine;
}
// Update file modification time to 15 minutes ago.
using Clock = std::filesystem::file_time_type::clock;
std::error_code error;
std::filesystem::last_write_time(mFilename, Clock::now() - std::chrono::minutes{15}, error);
ASSERT_EQ(error.value(), 0);
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ false);
verifyTraceFile();
}
// Check we cannot write to file if the trace write is disabled.
TEST_F(TransactionTraceWriterTest, canDisableTraceWriter) {
TransactionTraceWriter::getInstance().disable();
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ true);
EXPECT_NE(access(mFilename.c_str(), F_OK), 0);
TransactionTraceWriter::getInstance().enable();
TransactionTraceWriter::getInstance().invokeForTest(mFilename, /* overwrite */ true);
EXPECT_EQ(access(mFilename.c_str(), F_OK), 0);
verifyTraceFile();
}
} // namespace android
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