public void Wait50Millisec_UpdateAfter300Millisec_TotalWaitingIsApprox800Millisec()
{
var spin = new UpdateableSpin();
var watcher = new Stopwatch();
watcher.Start();
const int timeout = 500;
const int spanBeforeUpdate = 300;
Task.Factory.StartNew(() =>
{
Thread.Sleep(spanBeforeUpdate);
spin.UpdateTimeout();
});
spin.Wait(TimeSpan.FromMilliseconds(timeout));
watcher.Stop();
TimeSpan actual = TimeSpan.FromMilliseconds(watcher.ElapsedMilliseconds);
const int expected = timeout + spanBeforeUpdate;
TimeSpan left = TimeSpan.FromMilliseconds(expected - (expected * 0.1));
TimeSpan right = TimeSpan.FromMilliseconds(expected + (expected * 0.1));
Assert.IsTrue(actual > left && actual < right);
}
public void Wait_NoPulse_ReturnsFalse()
{
UpdateableSpin spin = new UpdateableSpin();
bool wasPulsed = spin.Wait(TimeSpan.FromMilliseconds(10));
Assert.IsFalse(wasPulsed);
}
public void Wait_Pulse_ReturnsTrue()
{
UpdateableSpin spin = new UpdateableSpin();
Task.Factory.StartNew(() =>
{
Thread.Sleep(100);
spin.Set();
});
bool wasPulsed = spin.Wait(TimeSpan.FromSeconds(10));
Assert.IsTrue(wasPulsed);
}
public void Wait50Millisec_ActuallyWaitingFor50Millisec()
{
var spin = new UpdateableSpin();
Stopwatch watcher = new Stopwatch();
watcher.Start();
spin.Wait(TimeSpan.FromMilliseconds(50));
watcher.Stop();
TimeSpan actual = TimeSpan.FromMilliseconds(watcher.ElapsedMilliseconds);
TimeSpan leftEpsilon = TimeSpan.FromMilliseconds(50 - (50 * 0.1));
TimeSpan rightEpsilon = TimeSpan.FromMilliseconds(50 + (50 * 0.1));
Assert.IsTrue(actual > leftEpsilon && actual < rightEpsilon);
}