public async Task Test4ThensAsync500MsEach2000MsTotal()
{
// Start the runner asynchronously.
Task t = Runner.Run(S).Then(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 all of the runner tasks to finish.
await t.ConfigureAwait(false);
Lapper.Stop();
// There should be 5 laps; one that we took right away and one each per runner task.
Assert.Equal(5, Laps.Count);
// The first task should have been lapped right away, a few milliseconds after starting.
// Let's give a 500% epsilon since the expected time is so short.
TimeAssert.DeltaEquals(TimeSpan.FromMilliseconds(10), Lapper.Laps[0], 5);
// The rest should each take about 500ms.
foreach (var lap in Laps.Skip(1))
{
TimeAssert.DeltaEquals(TimeSpan.FromMilliseconds(500), lap, 0.1);
}
// ... And the total time should have been about 4 x 500ms = 2000ms.
TimeAssert.DeltaEquals(TimeSpan.FromMilliseconds(2000), Lapper.Elapsed, 0.1);
}
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);
}