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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
#include "logging/env_logger.h"
#include "env/mock_env.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
namespace ROCKSDB_NAMESPACE {
namespace {
// In this test we only want to Log some simple log message with
// no format.
void LogMessage(std::shared_ptr<Logger> logger, const std::string& message) {
Log(logger, "%s", message.c_str());
}
// Helper method to write the message num_times in the given logger.
void WriteLogs(std::shared_ptr<Logger> logger, const std::string& message,
int num_times) {
for (int ii = 0; ii < num_times; ++ii) {
LogMessage(logger, message);
}
}
} // namespace
class EnvLoggerTest : public testing::Test {
public:
Env* env_;
EnvLoggerTest() : env_(Env::Default()) {}
~EnvLoggerTest() = default;
std::shared_ptr<Logger> CreateLogger() {
std::shared_ptr<Logger> result;
assert(NewEnvLogger(kLogFile, env_, &result).ok());
assert(result);
result->SetInfoLogLevel(InfoLogLevel::INFO_LEVEL);
return result;
}
void DeleteLogFile() { ASSERT_OK(env_->DeleteFile(kLogFile)); }
static const std::string kSampleMessage;
static const std::string kTestDir;
static const std::string kLogFile;
};
const std::string EnvLoggerTest::kSampleMessage =
"this is the message to be written to the log file!!";
const std::string EnvLoggerTest::kLogFile = test::PerThreadDBPath("log_file");
TEST_F(EnvLoggerTest, EmptyLogFile) {
auto logger = CreateLogger();
ASSERT_EQ(logger->Close(), Status::OK());
// Check the size of the log file.
uint64_t file_size;
ASSERT_EQ(env_->GetFileSize(kLogFile, &file_size), Status::OK());
ASSERT_EQ(file_size, 0);
DeleteLogFile();
}
TEST_F(EnvLoggerTest, LogMultipleLines) {
auto logger = CreateLogger();
// Write multiple lines.
const int kNumIter = 10;
WriteLogs(logger, kSampleMessage, kNumIter);
// Flush the logs.
logger->Flush();
ASSERT_EQ(logger->Close(), Status::OK());
// Validate whether the log file has 'kNumIter' number of lines.
ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
DeleteLogFile();
}
TEST_F(EnvLoggerTest, Overwrite) {
{
auto logger = CreateLogger();
// Write multiple lines.
const int kNumIter = 10;
WriteLogs(logger, kSampleMessage, kNumIter);
ASSERT_EQ(logger->Close(), Status::OK());
// Validate whether the log file has 'kNumIter' number of lines.
ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
}
// Now reopen the file again.
{
auto logger = CreateLogger();
// File should be empty.
uint64_t file_size;
ASSERT_EQ(env_->GetFileSize(kLogFile, &file_size), Status::OK());
ASSERT_EQ(file_size, 0);
ASSERT_EQ(logger->GetLogFileSize(), 0);
ASSERT_EQ(logger->Close(), Status::OK());
}
DeleteLogFile();
}
TEST_F(EnvLoggerTest, Close) {
auto logger = CreateLogger();
// Write multiple lines.
const int kNumIter = 10;
WriteLogs(logger, kSampleMessage, kNumIter);
ASSERT_EQ(logger->Close(), Status::OK());
// Validate whether the log file has 'kNumIter' number of lines.
ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
DeleteLogFile();
}
TEST_F(EnvLoggerTest, ConcurrentLogging) {
auto logger = CreateLogger();
const int kNumIter = 20;
std::function<void()> cb = [&]() {
WriteLogs(logger, kSampleMessage, kNumIter);
logger->Flush();
};
// Write to the logs from multiple threads.
std::vector<port::Thread> threads;
const int kNumThreads = 5;
// Create threads.
for (int ii = 0; ii < kNumThreads; ++ii) {
threads.push_back(port::Thread(cb));
}
// Wait for them to complete.
for (auto& th : threads) {
th.join();
}
ASSERT_EQ(logger->Close(), Status::OK());
// Verfiy the log file.
ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage),
kNumIter * kNumThreads);
DeleteLogFile();
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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