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#include <library/cpp/unified_agent_client/logger.h>
#include <library/cpp/logger/log.h>
#include <library/cpp/logger/stream.h>
#include <library/cpp/monlib/dynamic_counters/counters.h>
#include <library/cpp/testing/gtest/gtest.h>
#include <sstream>
#include <thread>
using namespace NUnifiedAgent;
using namespace NMonitoring;
// Helper to capture log output
class TTestLogBackend : public TLogBackend {
public:
explicit TTestLogBackend(std::ostringstream* stream)
: Stream(stream)
{
}
void WriteData(const TLogRecord& rec) override {
(*Stream) << rec.Data;
}
void ReopenLog() override {
}
private:
std::ostringstream* Stream;
};
class TLoggerTest : public ::testing::Test {
protected:
void SetUp() override {
LogStream = std::make_unique<std::ostringstream>();
Log = std::make_unique<TLog>(MakeHolder<TTestLogBackend>(LogStream.get()));
// Create counters for testing
Counters = MakeIntrusive<TDynamicCounters>();
ReceivedCounter = Counters->GetCounter("ReceivedCounter", true).Get();
DroppedCounter = Counters->GetCounter("DroppedCounter", true).Get();
// Create logger with throttling: 20 logs per 1 second
LoggerImpl = std::make_unique<TLogger>(*Log, Nothing(), 20, 1,
TLogger::TCounters{.RecordsReceived = ReceivedCounter,
.RecordsDropped = DroppedCounter});
Logger = LoggerImpl->Child("");
}
std::string GetLogOutput() {
return LogStream->str();
}
void ClearLogOutput() {
LogStream->str("");
LogStream->clear();
}
std::unique_ptr<std::ostringstream> LogStream;
std::unique_ptr<TLog> Log;
std::unique_ptr<TLogger> LoggerImpl;
TScopeLogger Logger;
TIntrusivePtr<TDynamicCounters> Counters;
TDeprecatedCounter* ReceivedCounter;
TDeprecatedCounter* DroppedCounter;
};
TEST_F(TLoggerTest, BasicThrottling) {
// Log 40 messages using YLOG_T macro
for (int i = 0; i < 40; ++i) {
YLOG_ERROR_T("Test message {}", i);
}
const auto output = GetLogOutput();
const int count = std::count(output.begin(), output.end(), '\n');
// Should log exactly 20 messages (first slot)
EXPECT_EQ(count, 20);
// Check counters: 40 received, 20 dropped
EXPECT_EQ(ReceivedCounter->Val(), 40);
EXPECT_EQ(DroppedCounter->Val(), 20);
}
TEST_F(TLoggerTest, SuppressedCounter) {
for (int i = 20 + 13; i >= 0; --i) {
if (i == 0) {
std::this_thread::sleep_for(std::chrono::seconds(1));
}
YLOG_ERROR_T("Test message");
}
const auto output = GetLogOutput();
// Should log 20 messages in first slot + 1 in second slot with suppressed count
const int count = std::count(output.begin(), output.end(), '\n');
EXPECT_EQ(count, 21);
// Should contain "suppressed" in the output (from the message after sleep)
EXPECT_NE(output.find("[+13 suppressed]"), std::string::npos);
// Check counters: 34 received (33 + 1 after sleep), 13 dropped
EXPECT_EQ(ReceivedCounter->Val(), 34);
EXPECT_EQ(DroppedCounter->Val(), 13);
}
TEST_F(TLoggerTest, IndependentThrottlingPerLocation) {
// Each log location should have independent throttling
for (int i = 0; i < 40; ++i) {
YLOG_ERROR_T("Location A"); // Line 1
YLOG_ERROR_T("Location B"); // Line 2 - different location
}
const auto output = GetLogOutput();
// Both locations should log ~20 messages each
const int locACount = std::count(output.begin(), output.end(), 'A');
const int locBCount = std::count(output.begin(), output.end(), 'B');
EXPECT_EQ(locACount, 20);
EXPECT_EQ(locBCount, 20);
// Total counters: 80 received, 40 dropped
EXPECT_EQ(ReceivedCounter->Val(), 80);
EXPECT_EQ(DroppedCounter->Val(), 40);
}
TEST_F(TLoggerTest, FormatMessage) {
YLOG_ERROR_T("Simple message");
YLOG_ERROR_T("Formatted: {}, {}", 42, "test");
const auto output = GetLogOutput();
EXPECT_NE(output.find("Simple message"), std::string::npos);
EXPECT_NE(output.find("Formatted: 42, test"), std::string::npos);
}
TEST_F(TLoggerTest, DifferentLogLevels) {
YLOG_INFO_T("Info message");
YLOG_WARNING_T("Warning message");
YLOG_ERROR_T("Error message");
const auto output = GetLogOutput();
EXPECT_NE(output.find("Info message"), std::string::npos);
EXPECT_NE(output.find("Warning message"), std::string::npos);
EXPECT_NE(output.find("Error message"), std::string::npos);
}
TEST_F(TLoggerTest, DisabledThrottling) {
LoggerImpl = std::make_unique<TLogger>(*Log, Nothing(), /*maxLogsPerSlot=*/0, /*slotSeconds=*/0,
TLogger::TCounters{.RecordsReceived = ReceivedCounter,
.RecordsDropped = DroppedCounter});
Logger = LoggerImpl->Child("");
// Log 40 messages using YLOG_T macro
for (int i = 0; i < 40; ++i) {
YLOG_ERROR_T("Test message {}", i);
}
const auto output = GetLogOutput();
const int count = std::count(output.begin(), output.end(), '\n');
// Should log exactly 40 messages (throttler disabled)
EXPECT_EQ(count, 40);
// Check counters: 40 received, 0 dropped
EXPECT_EQ(ReceivedCounter->Val(), 40);
EXPECT_EQ(DroppedCounter->Val(), 0);
}
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