public void WarewolfNumberOfErrorsByResource_Setup_CreatesCounter() { var mockPerformanceCounterFactory = new Mock <IRealPerformanceCounterFactory>(); var mockCounter = new Mock <IWarewolfPerformanceCounter>(); mockPerformanceCounterFactory.Setup(o => o.New(GlobalConstants.WarewolfServices, CounterName, GlobalConstants.GlobalCounterName)).Returns(mockCounter.Object); var performanceCounterFactory = mockPerformanceCounterFactory.Object; IPerformanceCounter counter = new WarewolfNumberOfErrorsByResource(_resourceGuid, _categoryInstanceName, performanceCounterFactory); counter.Setup(); mockPerformanceCounterFactory.Verify(o => o.New(GlobalConstants.WarewolfServices, CounterName, GlobalConstants.GlobalCounterName), Times.Once); }