public async Task GivenEmptyHandlerInState_WhenGrainActivates_ThenResumeHandler()
{
//Arrange
var onResumeCalled = false;
var onAttachingObserver = new Action <IAsyncObserver <ChatMessage> >(obs => onResumeCalled = true);
_stateWithHandle.ChatMessageStreamSubscriptionHandle =
await _stream.AddEmptyStreamHandler(onAttachingObserver);
//Check to see there is a handler registered
var handles = await _stream.GetAllSubscriptionHandles();
Assert.Equal(1, handles.Count);
Assert.False(onResumeCalled);
//Act
var grain = await Silo.CreateGrainAsync <PersistentListenerWithHandleInState>(1);
//Assert
Assert.True(onResumeCalled);
//Act
await _stream.OnNextAsync(new ChatMessage("here's a message"));
//Assert
var receivedMessages = await grain.ReceivedCount();
Assert.Equal(1, receivedMessages);
}
