An introduction to TDD methodology that dispells some myths about unit testing in general.

1. Test-Driven Development by John Blanco

2. The process of designing software by writing a validating client before the code. What is Test-Driven Development (TDD)? Maintaining an evolving set of unit tests that continuously validate the correctness (or not) of your code. What is Automated Unit Testing?

3. Automated Unit Testing != Test-Driven Development TDD is a way of thinking about your code, but it doesn’t require unit testing. That being said, you should write them if you can. Agile processes adapt to change. Unit tests help to manage change in our code. Unit Testing is a key component of the Agile Methodology

4. Dispelling Unit Testing Myths

8. xUnit is the framework for automating our unit tests. Implementations exist for C++, C#, Java, PHP, Ruby, Python, Perl, Prolog, LISP, … and Flex! Created by Erich Gamma, member of the GoF and co-author of Eclipse JDT. Introducing xUnit!

10. Don’t worry. Chances are, you’re already writing unit tests! Whoa! Whoa! Hold On -- This Seems Excessive!

11. <mx:Application creationComplete=“onCreationComplete()”> <mx:Script> private function onCreationComplete():void { // DEVELOPMENT ONLY - REMOVE LATER var htmlMaker:MyHTMLMaker = new MyHTMLMaker(); htmlMaker.startTag(“b”); htmlMaker.addContent(“My bold text!!!”); htmlMaker.endTag(); trace(“RESULT: ” + htmlMaker.toString()); } </mx:Script> . . . </mx:Application> Ever Write Code Like This…And Then Delete It Afterwards?

12. Fool! The problem is that you’re not anticipating CHANGE. When that happens, you will need to modify and test your code all over again. What if we kept that test? Yes! And then once I verify it’s working, I remove it. So?

15. Working Session

16. Wait! We Need a Change!

17. What Have We Accomplished?

21. Questions?