public void MessageTemplates_WhenRateLimitingEnabled_IncludesTheNumberOfSkippedMessages()
{
const int secondsBetweenLogs = 60;
var rateLimiter = new LogRateLimiter(secondsBetweenLogs);
var logger = new DatadogSerilogLogger(_logger, rateLimiter);
var clock = new SimpleClock();
_clockDisposable = Clock.SetForCurrentThread(clock);
WriteRateLimitedLogMessage(logger, "Warning level message");
// these aren't written, as rate limited
WriteRateLimitedLogMessage(logger, "Warning level message");
WriteRateLimitedLogMessage(logger, "Warning level message");
WriteRateLimitedLogMessage(logger, "Warning level message");
clock.UtcNow = clock.UtcNow.AddSeconds(secondsBetweenLogs);
WriteRateLimitedLogMessage(logger, "Warning level message");
Assert.True(
_logEventSink.Events.Count == 2,
$"Found {_logEventSink.Events.Count} messages: \r\n{string.Join("\r\n", _logEventSink.Events.Select(l => l.RenderMessage()))}");
Assert.Collection(
_logEventSink.Events,
log => log.RenderMessage().EndsWith(", 0 additional messages skipped"),
log => log.RenderMessage().EndsWith(", 3 additional messages skipped"));
}
public void ErrorsDuringRateLimiting_DontBubbleUp()
{
var rateLimiter = new FailingRateLimiter();
var logger = new DatadogSerilogLogger(_logger, rateLimiter);
// Should not throw
logger.Warning("Warning level message");
Assert.True(rateLimiter.WasInvoked);
Assert.Empty(_logEventSink.Events);
}
public void ErrorsDuringLogging_DontBubbleUp()
{
var mockLogger = new Mock <ILogger>();
mockLogger
.Setup(x => x.Write(It.IsAny <LogEventLevel>(), It.IsAny <Exception>(), It.IsAny <string>(), It.IsAny <object[]>()))
.Throws(new NotImplementedException());
var logger = new DatadogSerilogLogger(mockLogger.Object, new NullLogRateLimiter());
// Should not throw
logger.Warning("Warning level message");
Assert.Empty(_logEventSink.Events);
mockLogger.Verify();
}
public void RateLimiting_ConsidersLogMessagesOnSameLineToBeSame()
{
const int secondsBetweenLogs = 60;
var rateLimiter = new LogRateLimiter(secondsBetweenLogs);
var logger = new DatadogSerilogLogger(_logger, rateLimiter);
var clock = new SimpleClock();
_clockDisposable = Clock.SetForCurrentThread(clock);
#pragma warning disable SA1107 // Code must not contain multiple statements on one line
logger.Warning("Warning level message"); logger.Warning("Warning level message");
#pragma warning restore SA1107 // Code must not contain multiple statements on one line
Assert.True(
_logEventSink.Events.Count == 1,
$"Found {_logEventSink.Events.Count} messages: \r\n{string.Join("\r\n", _logEventSink.Events.Select(l => l.RenderMessage()))}");
}
public void RateLimiting_WhenLoggingIsOnSeparateLines_DoesntRateLimit()
{
const int secondsBetweenLogs = 60;
var rateLimiter = new LogRateLimiter(secondsBetweenLogs);
var logger = new DatadogSerilogLogger(_logger, rateLimiter);
var clock = new SimpleClock();
_clockDisposable = Clock.SetForCurrentThread(clock);
logger.Warning("Warning level message");
logger.Warning("Warning level message");
logger.Warning("Warning level message");
clock.UtcNow = clock.UtcNow.AddSeconds(secondsBetweenLogs);
logger.Warning("Warning level message");
Assert.True(
_logEventSink.Events.Count == 4,
$"Found {_logEventSink.Events.Count} messages: \r\n{string.Join("\r\n", _logEventSink.Events.Select(l => l.RenderMessage()))}");
}
