public async Task Test4AndsAsync500MsEach500MsTotal()
{
// Start the runner asynchronously.
Task t = Runner.Run(S).And(S, S, S).Async();
// Take a lap right away. This should be only a few milliseconds in
// if the runner tasks really started asynchronously.
Laps.Add(Lapper.Lap());
// Wait for the runner to finish.
await t.ConfigureAwait(false);
Lapper.Stop();
// The async lap (first lap) should have been only a few ms after its stopwatch started.
TimeAssert.EpsilonEquals(TimeSpan.FromMilliseconds(25), Laps[0], TimeSpan.FromMilliseconds(50));
// We should have one lap per task run.
Assert.Equal(5, Laps.Count);
// Each lap should be about 500ms...
// Skip the first lap because it was the one we took right away.
foreach (TimeSpan lap in Laps.Skip(1))
{
TimeAssert.DeltaEquals(TimeSpan.FromMilliseconds(500), lap, 0.1);
}
// And the elapsed time should be 500ms since the tasks were all run in parallel.
TimeAssert.DeltaEquals(TimeSpan.FromMilliseconds(500), Lapper.Elapsed, 0.1);
}
