public void EnumCounters()
{
var collection = new CounterCollection <TestCounters>();
XAssert.IsTrue(CounterCollection <TestCounters> .IsStopwatch(TestCounters.SomeTime));
XAssert.IsFalse(CounterCollection <TestCounters> .IsStopwatch(TestCounters.SomeCount));
// Increase the time
using (collection.StartStopwatch(TestCounters.SomeTime))
{
Thread.Sleep(1);
}
TimeSpan elapsed = collection.GetElapsedTime(TestCounters.SomeTime);
XAssert.IsTrue(elapsed.Ticks > 0);
XAssert.AreEqual <long>(0, collection.GetCounterValue(TestCounters.SomeCount));
collection.AddToCounter(TestCounters.SomeCount, 2);
XAssert.AreEqual(elapsed, collection.GetElapsedTime(TestCounters.SomeTime));
XAssert.AreEqual <long>(2, collection.GetCounterValue(TestCounters.SomeCount));
TimeSpan delta = new TimeSpan(100);
collection.AddToCounter(TestCounters.SomeTime, delta);
TimeSpan newElapsed = collection.GetElapsedTime(TestCounters.SomeTime);
// note: must not check if `newElapsed == elapsed.Add(delta)` because
// `AddToCounter(); GetElapsedTime()` is lossy due to float-point arithmetic
XAssert.IsTrue(newElapsed > elapsed);
}
/// <summary>
/// Appends <paramref name="other"/> into a current collection instance.
/// </summary>
public void Append(CounterCollection <TEnum> other)
{
foreach (var value in EnumTraits <TEnum> .EnumerateValues())
{
if (IsStopwatch(value))
{
AddToCounter(value, other.GetElapsedTime(value));
}
AddToCounter(value, other.GetCounterValue(value));
}
}
public void Temporal()
{
var collection = new CounterCollection <TestCounters>();
Stopwatch sw = Stopwatch.StartNew();
while (sw.ElapsedMilliseconds < 300)
{
using (collection.StartStopwatch(TestCounters.SomeTime))
{
Thread.Sleep(30);
}
}
sw.Stop();
// These times won't be exactly the same since the counter stopwatch is only measuring the sleep, not the loop and counter manipulation etc.
// In any of those steps we can get unlucky and be descheduled. But a large discrepancy is in high likelihood some serious fault.
TimeSpan delta = sw.Elapsed - collection.GetElapsedTime(TestCounters.SomeTime);
XAssert.IsTrue(
delta < 100.MillisecondsToTimeSpan(),
"Difference between System.Diagnostics.Stopwatch and the Counter stopwatch was very large");
}
