public void Server_busy_exceptions_will_bubble_up_with_retry()
{
var sender = new FakeMessageSender();
sender.ExceptionToThrow = i => { throw new ServerBusyException("Sorry, don't feel like serving you right now"); };
Assert.ThrowsAsync<ServerBusyException>(async () => await sender.RetryOnThrottleAsync(s => s.Send(new BrokeredMessage()), s => s.Send(new BrokeredMessage()), TimeSpan.FromSeconds(1), 5));
Assert.IsTrue(sender.IsInvoked);
Assert.AreEqual(6, sender.InvocationCount); // 6 = initial invocation + 5 retries
}
public async Task Server_busy_exceptions_will_not_bubble_up_after_successfull_retry()
{
var sender = new FakeMessageSender();
sender.ExceptionToThrow = i => { if (i < 4) { throw new ServerBusyException("Sorry, don't feel like serving you right now"); } };
await sender.RetryOnThrottleAsync(s => s.Send(new BrokeredMessage()), s => s.Send(new BrokeredMessage()), TimeSpan.FromSeconds(1), 5);
Assert.IsTrue(sender.IsInvoked);
Assert.AreEqual(4, sender.InvocationCount); // 4 = initial invocation + 3 retries
}
public void Non_server_busy_exceptions_will_bubble_up_without_retry()
{
var sender = new FakeMessageSender();
sender.ExceptionToThrow = i => { throw new NotSupportedException(); };
//validate
Assert.ThrowsAsync<NotSupportedException>(async () => await sender.RetryOnThrottleAsync(s => s.Send(new BrokeredMessage()), s => s.Send(new BrokeredMessage()), TimeSpan.FromSeconds(10), 5));
Assert.IsTrue(sender.IsInvoked);
Assert.AreEqual(1, sender.InvocationCount);
}
public async Task Can_send_brokered_messages()
{
var sender = new FakeMessageSender();
var tasks = new List <Task>();
tasks.Add(sender.RetryOnThrottleAsync(s => s.Send(new BrokeredMessage()), s => s.Send(new BrokeredMessage()), TimeSpan.FromSeconds(10), 5));
await Task.WhenAll(tasks);
//validate
Assert.IsTrue(sender.IsInvoked);
Assert.AreEqual(1, sender.InvocationCount);
}
public void Server_busy_exceptions_will_delay_retry()
{
var sender = new FakeMessageSender();
sender.ExceptionToThrow = i => { throw new ServerBusyException("Sorry, don't feel like serving you right now"); };
var sw = new Stopwatch();
sw.Start();
Assert.ThrowsAsync<ServerBusyException>(async () => await sender.RetryOnThrottleAsync(s => s.Send(new BrokeredMessage()), s => s.Send(new BrokeredMessage()), TimeSpan.FromSeconds(5), 1));
sw.Stop();
Assert.IsTrue(sender.IsInvoked);
Assert.AreEqual(2, sender.InvocationCount); // 2 = initial invocation + 1 retries
Assert.IsTrue(sw.ElapsedMilliseconds > TimeSpan.FromSeconds(4).TotalMilliseconds);
}
