YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

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#include <string>

#include <vector>

#include <glog/logging.h>

#include <gmock/gmock.h>

#include "yb/util/logging_test_util.h"

#include "yb/util/logging.h"

#include "yb/util/monotime.h"

DECLARE_string(vmodule);

using std::string;

using std::vector;

// LoggingTest is not actually an integration test, but we put it here, so it will be linked with

// all libraries used for YB cluster processes, because static object initialization in thse

// libraries could cause logging issues.

// For example: https://github.com/yugabyte/yugabyte-db/issues/3176

namespace yb {

// Test the YB_LOG_EVERY_N_SECS(...) macro.

TEST(LoggingTest, TestThrottledLogging) {

  StringVectorSink sink;

  ScopedRegisterSink srs(&sink);

  for (int i = 0; i < 10000; i++) {

    YB_LOG_EVERY_N_SECS(INFO, 1) << "test" << THROTTLE_MSG;

    SleepFor(MonoDelta::FromMilliseconds(1));

    if (sink.logged_msgs().size() >= 2) break;

  }

  const vector<string>& msgs = sink.logged_msgs();

  ASSERT_GE(msgs.size(), 2);

  // The first log line shouldn't have a suppression count.

  EXPECT_THAT(msgs[0], testing::ContainsRegex("test$"));

  // The second one should have suppressed at least three digits worth of log messages.

  EXPECT_THAT(msgs[1], testing::ContainsRegex("\\[suppressed [0-9]{3,} similar messages\\]"));

}

TEST(LoggingTest, VModule) {

  google::FlagSaver flag_saver;

  FLAGS_vmodule = "logging-test=1";

  ASSERT_TRUE(VLOG_IS_ON(1));

  constexpr auto kPattern = "vmodule-test";

  StringVectorSink sink;

  ScopedRegisterSink srs(&sink);

  VLOG(1) << kPattern;

  const vector<string>& msgs = sink.logged_msgs();

  ASSERT_GE(msgs.size(), 1);

  EXPECT_THAT(msgs[0], testing::HasSubstr(kPattern));

}

} // namespace yb