protected override async Task <Tuple <decimal, string> > InvokeTestAsync(ExceptionAggregator aggregator)
{
BenchmarkEventSource.Log.BenchmarkStart(this.DisplayName, TestCase.Iterations);
//inject ITracer instance if test method defines single parameter of type ITracer
var testMethodParams = TestMethod.GetParameters();
var hasTracerParam = (testMethodParams.Length == 1 && testMethodParams[0].ParameterType == typeof(ITracer));
var args = hasTracerParam ? new object[] { NullTracer.Instance } : null;
//run the test once to make sure it's been jitted
await new BenchmarkTestInvoker(Test, MessageBus, TestClass, ConstructorArguments, TestMethod, args, aggregator, CancellationTokenSource).RunAsync();
decimal executionTime = 0;
//starting from 1 so that iteration number appears correctly in ETW log
for (int i = 1; i <= TestCase.Iterations; i++)
{
if (TestCase.CollectGargage)
{
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
}
var stopwatchTracer = new StopwatchTracer();
BenchmarkEventSource.Log.BenchmarkIterationStart(i);
var invokerTime = await new BenchmarkTestInvoker(Test, MessageBus, TestClass, ConstructorArguments, TestMethod, hasTracerParam ? new object[] { stopwatchTracer } : null, aggregator, CancellationTokenSource).RunAsync();
BenchmarkEventSource.Log.BenchmarkIterationStop(i);
var stopwatchTime = stopwatchTracer.GetElapsed();
if (stopwatchTime.HasValue)
{
executionTime += stopwatchTime.Value;
}
else
{
executionTime += invokerTime;
}
}
var message = new DiagnosticMessage("{0} , Iterations : {1} , TotalMilliseconds : {2}", this.DisplayName, TestCase.Iterations, executionTime * 1000);
diagnosticMessageSink.OnMessage(message);
BenchmarkEventSource.Log.BenchmarkStop(this.DisplayName, TestCase.Iterations);
return(Tuple.Create(executionTime, string.Empty));
}
public Disposer(StopwatchTracer tracer)
{
this.tracer = tracer;
}