Fluent interface to test MVVMLight Messenger

gistfile1.cs

        [Test, RequiresSTA]
        public void DeleteBrickCommand_BrickSelected_ExpectEnableMainWindowMessageSentWithFalseThenTrue()
        {
            //Arrange
            var productViewModel = makeProductViewModel();
            var brick = productViewModel.AddBrick();

            var rootGraphSourceViewModel = new RootGraphSourceViewModel();
            rootGraphSourceViewModel.Initialize(productViewModel);
            rootGraphSourceViewModel.Show();

            brick.IsSelected = true;

            //Act
            //Assert
            rootGraphSourceViewModel.Expect()
                .SendingMessages<EnableMainWindowMessage, bool>(new [] { false, true })
                .When(model => model.DeleteBrickCommand.Execute(null));
        }

Testing that the message EnableMainWindowMessage with the value false is sent then with the value true when the DeleteBrickCommand is executed.

Have you considered extending FluentAssertions (http://fluentassertions.codeplex.com/) for that? And something similar was done for MVC in another project (https://fluentassertionsmvc.codeplex.com/).

@dennisdoomen Thanks! No I haven't at the moment, but this is also why I posted that, to get some idea!
btw the MVC project is not really relevant as I target MVVMLight so WPF, Silverlight and Win8 Metro and Windows Phone