public void WarewolfRequestsPerSecondPerformanceCounter_Increment_CallsUnderlyingCounter() { var mockPerformanceCounterFactory = new Mock <IRealPerformanceCounterFactory>(); var mockCounter = new Mock <IWarewolfPerformanceCounter>(); mockPerformanceCounterFactory.Setup(o => o.New(GlobalConstants.Warewolf, CounterName, GlobalConstants.GlobalCounterName)).Returns(mockCounter.Object).Verifiable(); var performanceCounterFactory = mockPerformanceCounterFactory.Object; IPerformanceCounter counter = new WarewolfRequestsPerSecondPerformanceCounter(performanceCounterFactory); counter.Setup(); counter.Increment(); mockPerformanceCounterFactory.Verify(); mockCounter.Verify(o => o.Increment(), Times.Once); }