<b>Thinking in TDD (Test Driven Development)</b><br><br>Attending a TDD works...

Terrence Miao - 2012-11-02 00:23:37+1100 - Updated: 2012-11-02 00:37:48+1100

Thinking in TDD (Test Driven Development)

Attending a TDD workshop. Uncle Bob's Bowling game Kata is used to as TDD demonstration. This totally change my previous view about TDD.

TDD is not just simple as:

1. write a failed test
2. write production code
3. make test pass

or this Red-Green-Refactor pattern. Actually,

• TDD is design in front, a top down not bottom up approach
• When you practice TDD, you will guarantee have 100% code test coverage. No one line code more, no one line code less. One line code deleted and your test will fail
• Small change in TDD iteration could reduce cycle time
• Debugging no more. Practicing TDD you don't really need debug your code. So that's why average developers use Eclipse, good developers use IntelliJ, great developers use VI
• Copy & paste becomes a problem in TDD. As we all know average developers code code, good developers copy & paste code, great developers steal code. But TDD reduces duplicated code and prevent copy & paste programming
• Believe it or not, TDD can finish coding quicker than traditional write production code first, then write test development cycle

Reference: Bowling Game Kata, _http://butunclebob.com/files/downloads/Bowling%20Game%20Kata.ppt_

Dean Budd - 2012-11-02 07:54:12+1100 - Updated: 2012-11-02 07:55:51+1100

The Bowling Game Kata is great. It also shows us how TDD produces much simpler design. Most would approach the Bowling Game by designing several classes to represent each concept i.e Frame, Game, etc not ever knowing that the solution is a for loop with two if statements
I would highly recommend you watch

http://www.cleancoders.com/codecast/clean-code-episode-6-part-2/show

where Bob "pairs" with you through the Bowling Game kata.

As you're probably well aware by now, I'm highly dubious of any design that wasn't at least attempted through using Test Driven Development.

=)

+Wade Reweti Cuz. Watch this Episode.

James Gemmell - 2012-11-02 10:14:56+1100

LOL - it sounds like you have added another convert to your flock Brother Deano. :-D

Dean Budd - 2012-11-02 10:43:33+1100 - Updated: 2012-11-02 10:44:10+1100

+James Gemmell HAHAHAHA It's Arch-Bishop Budd now...

Kieran Simpson - 2012-11-02 11:15:59+1100

All hail ~~the hyno toad~~ Arch-Bishop Budd.

Kieran Simpson - 2012-11-02 11:22:59+1100

+James Gemmell I've also converted a friend of mine due to me doing TDD on a collaborative project. Every time he tells me there's a bug in the code, I tell him to give me a failing test as proof. He's converted now seeing the reliability and readability of our project. I think it was the major Domain refactoring that worked because the tests drove the process as well as giving us confidence in the result.