public void NoJitter()
{
var options = RetriableTransactionOptions.CreateWithNoJitter();
var delay = TimeSpan.FromTicks(TimeSpan.TicksPerMillisecond);
var delayTicks = (int)delay.Ticks;
var expectedJitteredTicks = delayTicks;
// This shouldn't jitter at all, 50_000 seems a good enough sample
// to test that.
var delays = Enumerable.Range(0, 50_000)
.Select(_ => options.Jitter(delay))
.ToList();
var min = delays.Min();
var max = delays.Max();
Assert.Equal(expectedJitteredTicks, min.Ticks);
Assert.Equal(expectedJitteredTicks, max.Ticks);
}
public void DefaultJitter()
{
var options = RetriableTransactionOptions.CreateDefault();
var delay = TimeSpan.FromTicks(TimeSpan.TicksPerMillisecond);
var delayTicks = (int)delay.Ticks;
// The jitter on RetriableTransactionOptions should jitter between
// delay and delay * 2.
var expectedMinDelayTicks = delayTicks;
var expectedMaxDelayTicks = delayTicks * 2;
var expectedMedianDelayTicks = (expectedMinDelayTicks + expectedMaxDelayTicks) / 2;
var delays = Enumerable.Range(0, 10_000)
.Select(_ => options.Jitter(delay))
.ToList();
var underMedianCount = delays.LongCount(ts => ts.Ticks <= expectedMedianDelayTicks);
Assert.InRange(underMedianCount, 4_000, 6_000);
}
