monitoring_test.cc

#include "monitoring.h"

#include "gmock.h"
#include "gunit.h"
#include "mock-log.h"
#include "absl/base/log_severity.h"
#include "absl/strings/string_view.h"
#include "absl/time/clock.h"
#include "absl/time/time.h"
#include <source_location>
#include "log_monitoring.h"  // IWYU pragma: keep, Needed for template definitions

namespace {
using ::testing::HasSubstr;
using ::testing::ScopedMockLog;

TEST(LatencyMonitorTest, LatencyIsMeasuredCorrectly) {
  ScopedMockLog log(testing::kDoNotCaptureLogsYet);

  milotic::metrics::Latency<int> latency(
      "test_latency", {"test_field"}, {.description = "Test latency metric"});

  absl::Time now = absl::Now();
  auto fake_now = [&now] { return now; };

  EXPECT_CALL(
      log, Log(base_logging::INFO, std::source_location::current().file_name(),
               HasSubstr("test_latency(test_field=200): 1s")));
  {
    log.StartCapturingLogs();
    milotic::LatencyMonitor monitor(&latency, {200}, fake_now);
    now += absl::Seconds(1);
  }
}

}  // namespace