This document provides an overview of test driving a MVVM app. It discusses prerequisites like the MVVM pattern and testing frameworks. It introduces test doubles and test driven development methodology. The agenda includes a short intro to TDD, a live coding demo of a simple todo list app using TDD, and a Q&A session. Tools mentioned are Visual Studio, Resharper, xUnit, Moq and Pomodoro. References for further reading on TDD and unit testing are also provided.

1. Test Driving a MVVM appEmanuele DelBono emanuele@codiceplastico.comhttp://blog.codiceplastico.com/emaTwitter @emadb

2. Who I amDev in CodicePlasticoC#WPF/ASP.NET MVCRuby/Ruby on RailsTDD passionateUgiALT.NET founderSpeaker/blogger

3. AgendaVery short intro to TDD2 pomodori of live codingQ&A&Discussion

4. PrerequisitesMVVM patternTesting frameworkTest doubles (Mock/Stub)

5. Doubts?

6. MVVM in one slideViewtextboxbuttonPropertieslistboxCommandsViewModelModel

7. Testing FrameworksAn xUnit tool toMinimize effort in writing testsSimplify the running phaseUsually is an assembly to reference in your test projects, with:A bunch of attributes to mark the test methodsA bunch of asserts to verify your expectations

8. Test doublesTo keep the focus on the tested object we need to remove all the dependenciesTest doubles act as “fake” dependencies that replace the real onesFrameworks like Moq, RhinoMock, etc…came to help

9. TDDTest Driven Development / Test Driven DesignA design practice3 simple rulesWrite no production code without failing testsWrite only enough test code so that it failsWrite only enough production code to get your tests to passRobert (uncle bob) Martin

10. Sample AppA simple Todo list managerWhen the app starts I want see the to do listI want to be able to add a new Item specifing a description and a due dateI want to be able to delete an itemI want to be able to mark an item as complete

11. ToolsVisual Studio 2010 / Expression BlendResharperxUnit + xUnitContribMoqPomodoro

12. First step

13. Let’s Code

14. ThanksReferences:Growing object oriented software – Freeman, Pryce – Addison WesleyThe art of Unit Testing – RoyOsherove - Manninghttp://xunitpatterns.com/http://www.mockobjects.com/Codehttp://wpftodolist.googlecode.com

15. …un ultimacosa…12 e 13 Giugno…ricordatevidei referendum 