public void HasBlockingBehavior() { Stopwatch stopwatch = Stopwatch.StartNew(); _logger.Info("Via no-blocking mechanism."); stopwatch.Stop(); var noblockingCallDuration = stopwatch.Elapsed.TotalMilliseconds; stopwatch = Stopwatch.StartNew(); try { _logger.AsBlockingLogger(TimeSpan.FromMilliseconds(10000)) .Info("Via blocking mechanism.") ; } catch (TimeoutException ex) { Assert.Fail("The timeout should be large enough for this test!", ex); } stopwatch.Stop(); var blockingCallDuration = stopwatch.Elapsed.TotalMilliseconds; Assert.IsTrue(blockingCallDuration > (10 * noblockingCallDuration)); }