public async Task CircuitBreaker_must_close_again_after_service_initialization()
        {
            breaker.Tell(ServiceEvent.Failed(LogId, 1, TestLogFailureException));
            try
            {
                await breaker.Ask("a", Timeout);
            }
            catch (AggregateException e) when(e.Flatten().InnerException is EventLogUnavailableException)
            {
                // as expected
            }

            breaker.Tell(ServiceEvent.Initialized(LogId));
            (await breaker.Ask("a", Timeout)).Should().Be("re-a");
        }