public void should_reenable_appender_after_quarantine_delay() { var logEvent = new Mock <ILogEvent>().Object; var message = new byte[4]; _appenderMock.Setup(x => x.WriteEvent(logEvent, message, message.Length)).Throws <Exception>(); SystemDateTime.PauseTime(); _guardedAppender.WriteEvent(logEvent, message, message.Length); _appenderMock.Verify(x => x.WriteEvent(logEvent, message, message.Length), Times.Once); SystemDateTime.AddToPausedTime(TimeSpan.FromSeconds(2)); _guardedAppender.WriteEvent(logEvent, message, message.Length); _appenderMock.Verify(x => x.WriteEvent(logEvent, message, message.Length), Times.Once); SystemDateTime.AddToPausedTime(TimeSpan.FromSeconds(20)); _guardedAppender.WriteEvent(logEvent, message, message.Length); _appenderMock.Verify(x => x.WriteEvent(logEvent, message, message.Length), Times.Exactly(2)); }