“Hello World” - The TDD way?

Question

Well I have been thinking about this for a while, ever since I was introduced to TDD. Which would be the best way to build a \"Hello World\" application ? which would print \"H

Answer 1

I really have to object to the question! All methodologies have their place, and TDD is good in a lot of places. But user interfaces is the first place I really back off from TDD. This, in my humble opinion is one of the best justifications of the MVC design pattern: test the heck out of your models and controller programmatically; visually inspect your view. What you're talking about is hard-coding the data "Hello World" and testing that it makes it to the console. To do this test in the same source language, you pretty much have to dummy the console object, which is the only object that does anything at all.

Alternately, you can script your test in bash:

echo `java HelloWorldProgram`|grep -c "^Hello World$"

A bit difficult to add to a JUnit test suite, but something tells me that was never the plan....