public void SumTotal_Increment_IsThreadSafe()
{
var expectedCounts = 100000 * Environment.ProcessorCount;
var counter = new SumTotal();
var cancellationTokenSource = new CancellationTokenSource();
var tasks = new List <Task>();
for (int i = 0; i < Environment.ProcessorCount; i++)
{
tasks.Add(Task.Factory.StartNew(() =>
{
Thread.Sleep(1000);
while (counter.Increment() <= (expectedCounts - Environment.ProcessorCount))
{
if (cancellationTokenSource.IsCancellationRequested)
{
return;
}
}
;
}, cancellationTokenSource.Token));
}
if (!Task.WaitAll(tasks.ToArray(), 3000, cancellationTokenSource.Token))
{
cancellationTokenSource.Cancel(false);
Task.WaitAll(tasks.ToArray());
Assert.Fail("Counter tasks timed out.");
}
Assert.AreEqual(expectedCounts, counter.Value);
}
public void CompositeCounter_BasicVerification()
{
var sumTotal = new SumTotal();
var ratePerSec = new RatePerSecond();
var meanPerSec =
new MeanAverage(
ratePerSec.Denominator);
var medianPerSec = new MedianAverage();
var movingAverage = new MovingAverage(7);
var composite = new CompositeCounter()
.AddCounter(sumTotal)
.AddCounter(ratePerSec)
.AddCounter(meanPerSec)
.AddCounter(medianPerSec)
.AddCounter(movingAverage);
var expectedSumTotal = 0L;
var elapsedTime = new ElapsedTime(ElapsedTime.ElapsedTimeUnitType.Milliseconds);
while (elapsedTime.Value <= 500)
{
Thread.Sleep(50);
expectedSumTotal++;
composite.Increment(1);
}
Thread.Sleep(500);
Assert.AreEqual(expectedSumTotal, sumTotal.Value);
Assert.AreEqual(10 /* == 1 per 50ms for 500ms */, ratePerSec.Value);
Assert.AreEqual(sumTotal.Value, composite.Value);
}
