public void Init()
{
timer = Substitute.For <IHeartBeatTimer>();
invoke = Substitute.For <ISynchronizationContext>();
invoke.When(x => x.Post(Arg.Any <Action>())).Do(callInfo =>
{
Assert.IsNull(lastInvokedAction);
lastInvokedAction = callInfo.Arg <Action>();
});
agg = ((IProgressAggregatorFactory) new ProgressAggregator.Factory(timer, invoke)).CreateProgressAggregator();
outEvents = MakeOutEventsMock(agg);
}