public void WindowsPerformanceFacadeTest_VerifyWeCanSeeWellKnownCategoryTest()
{
int counterId = WindowsPerformanceFacade.GetPerformanceCounterId("cache", null, "Dirty Pages");
float value = WindowsPerformanceFacade.NextValue(counterId);
Assert.AreNotEqual(0.0f, value, 0.1f, "dirty pages should not be 0.0");
}
public void WindowsPerformanceFacadeTest_VerifyIncrementBySimple64()
{
int counterId = WindowsPerformanceFacade.GetPerformanceCounterId(CounterTestUtilities.TestCategoryName, null, CounterTestUtilities.TestCounterNumberOfItems64Name);
float initialValue = WindowsPerformanceFacade.NextValue(counterId);
WindowsPerformanceFacade.IncrementBy(counterId, 3);
float finalValue = WindowsPerformanceFacade.NextValue(counterId);
Assert.AreEqual(initialValue + 3, finalValue);
}
public void WindowsPerformanceFacadeTest_VerifyIncrementAverageTimer32()
{
int counterId = WindowsPerformanceFacade.GetPerformanceCounterId(CounterTestUtilities.TestCategoryName, null, CounterTestUtilities.TestAverageTimer32Name);
WindowsPerformanceFacade.Increment(counterId);
WindowsPerformanceFacade.Increment(counterId);
float finalValue = WindowsPerformanceFacade.NextValue(counterId);
//// ((N1 - N0) / F) / (B1 - B0)
//// how fast is our clock
float freq = Stopwatch.Frequency;
float numerator = ((float)(2 - 1)) / freq;
float denominator = 2 - 1;
Assert.AreEqual(numerator / denominator, finalValue, .002, "Freq: " + freq);
}
public void WindowsPerformanceFacadeTest_VerifyDecrementAverageTimer32()
{
int counterId = WindowsPerformanceFacade.GetPerformanceCounterId(CounterTestUtilities.TestCategoryName, null, CounterTestUtilities.TestAverageTimer32Name);
WindowsPerformanceFacade.Increment(counterId);
WindowsPerformanceFacade.Increment(counterId);
WindowsPerformanceFacade.Decrement(counterId);
float finalValue = WindowsPerformanceFacade.NextValue(counterId);
//// ((N1 - N0) / F) / (B1 - B0)
//// how fast is our clock
float freq = Stopwatch.Frequency;
//// ((N1 - N0) / F)
float numerator = (1 - 2) / freq;
float denominator = 3 - 2;
Assert.AreEqual(numerator / denominator, finalValue, .002, "Freq: " + freq);
//// the final value is actually 0 here and our calculatd value is very small, almost -0
}
public void WindowsPerformanceFacadeTest_VerifyIncrementByAverageTimer32()
{
//// The spans need to be ever increasing number like if you used a global stopwatch
long span1 = 1000;
long span2 = 2000;
int counterId = WindowsPerformanceFacade.GetPerformanceCounterId(CounterTestUtilities.TestCategoryName, null, CounterTestUtilities.TestAverageTimer32Name);
//// average (time) of all measurements performed. lets assume it was clear before we ran the test
WindowsPerformanceFacade.IncrementBy(counterId, span1);
WindowsPerformanceFacade.IncrementBy(counterId, span2);
//// average (time) of all measurements performed.
float finalValue = WindowsPerformanceFacade.NextValue(counterId);
//// ((N1 - N0) / F) / (B1 - B0)
//// how fast is our clock
float freq = Stopwatch.Frequency;
float numerator = ((float)(span2 - span1)) / freq;
float denominator = 2 - 1;
Assert.AreEqual(numerator / denominator, finalValue, .002, "Freq: " + freq);
}
