public async Task RegisterMessageHandler_ThrowsOnMutipleMessageHandlerRegistrations()
{
// Arrange
Task MessageHandler(IMessage message, CancellationToken cancellationToken)
{
throw new Exception("There should be no messages to process.");
}
await _sut.RegisterMessageHandler(MessageHandler);
// Act
var exception = await Record.ExceptionAsync(() => _sut.RegisterMessageHandler(MessageHandler));
// Assert
Assert.IsType <InvalidOperationException>(exception);
}
public async Task RegisterMessageHandler_MessageHandlerInvoked()
{
// Arrange
var evt = new ManualResetEvent(false);
Task MessageHandler(IMessage message, CancellationToken cancellationToken)
{
evt.Set();
return(Task.CompletedTask);
}
await _sut.RegisterMessageHandler(MessageHandler);
// Act
await _messagePublisher.EnqueueAsync(
Guid.NewGuid().ToString(),
CancellationToken.None);
// Assert
Assert.True(evt.WaitOne(TimeSpan.FromSeconds(1)));
}
