public void ShouldNotRetryOnSuccess()
{
var retryLogic = new RxRetryLogic(TimeSpan.FromSeconds(5), null);
retryLogic
.Retry(Observable.Return(5))
.WaitForCompletion()
.AssertEqual(
OnNext(0, 5),
OnCompleted <int>(0));
}
public void ShouldRetryOnTransientErrors(Exception error)
{
var retryLogic = new RxRetryLogic(TimeSpan.FromSeconds(5), null);
retryLogic
.Retry(CreateFailingObservable(1, error))
.WaitForCompletion()
.AssertEqual(
OnNext(0, 1),
OnCompleted <int>(0));
}
public void ShouldRetryAtLeastTwice()
{
var error = new TransientException("code", "message");
var logger = new Mock <ILogger>();
var retryLogic = new RxRetryLogic(TimeSpan.FromSeconds(1), logger.Object);
retryLogic
.Retry(CreateFailingObservable(TimeSpan.FromSeconds(2), 1, error))
.WaitForCompletion()
.AssertEqual(
OnNext(0, 1),
OnCompleted <int>(0));
logger.Verify(x => x.Warn(error,
It.Is <string>(s => s.StartsWith("Transaction failed and will be retried in"))),
Times.Once);
}
public void ShouldLogRetries(int errorCount)
{
var error = new TransientException("code", "message");
var logger = new Mock <ILogger>();
var retryLogic = new RxRetryLogic(TimeSpan.FromMinutes(1), logger.Object);
retryLogic
.Retry(CreateFailingObservable(1,
Enumerable.Range(1, errorCount).Select(x => error).Cast <Exception>().ToArray()))
.WaitForCompletion()
.AssertEqual(
OnNext(0, 1),
OnCompleted <int>(0));
logger.Verify(x => x.Warn(error,
It.Is <string>(s => s.StartsWith("Transaction failed and will be retried in"))),
Times.Exactly(errorCount));
}
public void ShouldThrowServiceUnavailableWhenRetriesTimedOut()
{
var errorCount = 3;
var exceptions = Enumerable.Range(1, errorCount).Select(i => new TransientException($"{i}", $"{i}"))
.Cast <Exception>().ToArray();
var logger = new Mock <ILogger>();
var retryLogic = new RxRetryLogic(TimeSpan.FromSeconds(2), logger.Object);
retryLogic
.Retry(CreateFailingObservable(TimeSpan.FromSeconds(1), 1, exceptions))
.WaitForCompletion()
.AssertEqual(
OnError <int>(0,
e => Matches(() =>
e.Should().BeOfType <ServiceUnavailableException>()
.Which.InnerException.Should().BeOfType <AggregateException>()
.Which.InnerExceptions.Should().BeSubsetOf(exceptions))));
}
public void ShouldNotRetryOnNonTransientErrors(Exception error)
{
var retryLogic = new RxRetryLogic(TimeSpan.FromSeconds(5), null);
var observable =
Scheduler.CreateColdObservable(
OnNext(100, 1),
OnNext(150, 2),
OnNext(250, 3),
OnError <int>(350, error));
var observer = Scheduler.Start(() =>
retryLogic.Retry(observable), 0, 100, 500);
observer.Messages.AssertEqual(
OnNext(200, 1),
OnNext(250, 2),
OnNext(350, 3),
OnError <int>(450, error));
}
