public void IncrementsMultipleInstancesIndependently() { string firstInstanceName = "first"; string secondInstanceName = "second"; FixedPrefixNameFormatter formatter = new FixedPrefixNameFormatter("Baz - "); var connectionOpenedCounter = new EnterpriseLibraryPerformanceCounter( NewDataInstrumentationProvider.CounterCategoryName, NewDataInstrumentationProvider.TotalConnectionOpenedCounter, formatter.CreateName(firstInstanceName), formatter.CreateName(secondInstanceName)); var firstProvider = new NewDataInstrumentationProvider(firstInstanceName, true, true, formatter); var secondProvider = new NewDataInstrumentationProvider(secondInstanceName, true, true, formatter); firstProvider.FireConnectionOpenedEvent(); Assert.AreEqual(1, connectionOpenedCounter.GetValueFor(formatter.CreateName(firstInstanceName))); Assert.AreEqual(0, connectionOpenedCounter.GetValueFor(formatter.CreateName(secondInstanceName))); secondProvider.FireConnectionOpenedEvent(); Assert.AreEqual(1, connectionOpenedCounter.GetValueFor(formatter.CreateName(firstInstanceName))); Assert.AreEqual(1, connectionOpenedCounter.GetValueFor(formatter.CreateName(secondInstanceName))); }