public void Should_Fail_Initital_Attempt_And_Each_Explictely_Specified_Backoff_Retry(int maxAttempts)
{
Action failingFunction = () => throw new Exception("function failed");
var backoffRetry = new BackoffRetry(failingFunction);
bool result = backoffRetry.AttemptExponential(maxAttempts, TimeSpan.FromMilliseconds(10));
Assert.That(result, Is.False);
Assert.That(backoffRetry.Attempts, Is.EqualTo(maxAttempts));
Assert.That(backoffRetry.Exceptions.Count(), Is.EqualTo(maxAttempts));
}
public void Should_Suceed_On_First_Attempt()
{
Action successfulFunction = () => { Thread.Sleep(10); };
var backoffRetry = new BackoffRetry(successfulFunction);
bool result = backoffRetry.AttemptExponential(10, TimeSpan.FromMilliseconds(10));
Assert.That(result, Is.True);
Assert.That(backoffRetry.Attempts, Is.EqualTo(1));
Assert.That(backoffRetry.Exceptions.Count(), Is.EqualTo(0));
}
public void Should_Succeed_After_Specified_Attempt(int succeedOnAttempt)
{
int attempt = 1;
Action successfulFunction = () =>
{
if (attempt++ < succeedOnAttempt)
{
throw new Exception("Not time to succeed yet");
}
};
var backoffRetry = new BackoffRetry(successfulFunction);
bool result = backoffRetry.AttemptExponential(10, TimeSpan.FromMilliseconds(10));
Assert.That(result, Is.True);
Assert.That(backoffRetry.Attempts, Is.EqualTo(succeedOnAttempt));
Assert.That(backoffRetry.Exceptions.Count(), Is.EqualTo(succeedOnAttempt - 1));
}
public void Should_Throw_ArgumentOutOfRangeException_When_Requesting_Only_One_Attempt()
{
var backoffRetry = new BackoffRetry(() => { });
Assert.Throws(typeof(ArgumentOutOfRangeException), () => backoffRetry.AttemptExponential(1, TimeSpan.FromMilliseconds(10)));
}