[InlineData(10 * 60)] // 10 min
public void ReturnPeriodAfterFirstFailure(int periodInSeconds)
{
// Arrange
var want = TimeSpan.FromSeconds(periodInSeconds);
var schedule = new ExponentialBackoffConnectionSchedule(want);
schedule.MarkFailure();
// Act
var got = schedule.NextInterval;
// Assert
got.ShouldBe(want);
}
[InlineData(10 * 60)] // 10 min
public void RemainCappedDuringFailures(int periodInSeconds)
{
// Arrange
var period = TimeSpan.FromSeconds(periodInSeconds);
var schedule = new ExponentialBackoffConnectionSchedule(period);
// Lets make sure the backoff is capped
while (schedule.NextInterval != ExponentialBackoffConnectionSchedule.MaximumBackoffInterval)
{
schedule.MarkFailure();
}
// Act
for (var i = 0; i < 100000; i++) // 100 000 failures is the result of almost two years of downtime
{
// Assert
if (schedule.NextInterval != ExponentialBackoffConnectionSchedule.MaximumBackoffInterval)
{
throw new Exception($"Backoff schedule transitioned from being capped ({ExponentialBackoffConnectionSchedule.MaximumBackoffInterval}) to no longer being capped ({schedule.NextInterval})");
}
schedule.MarkFailure();
}
}
[InlineData(10 * 60)] // 10 min
public void BehaveExponentially(int periodInSeconds)
{
// Arrange
var period = TimeSpan.FromSeconds(periodInSeconds);
var schedule = new ExponentialBackoffConnectionSchedule(period);
IBackoff backoff = new LinearBackoff(period);
while (!(backoff is CappedBackoff))
{
// Act
schedule.MarkFailure();
// Assert
backoff = backoff.GetNext(schedule.NextInterval);
}
}