 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
Presenter
Michael Hill, Object Mentor, Inc.
Summary
Perhaps the hardest move to make in adopting XP is the one from test-less-ness to test-first-ness. Most beginners try this by becoming design-first-but-in-your-head-testers. This is not a bad start, but it won’t do to carry you into intermediate test-driven skills. Crutches are notoriously bad things. Unless, of course, you happen to need one to walk. The design sketch techniques presented here are no formal part of XP, but they’re a very good crutch for getting to intermediate Test-Driven Development. In this tutorial we’ll learn what a design sketch is, how to create one, and how to use them to communicate your ideas to your pair and your team.
Duration and Target Audience
This is a half-day tutorial whose target is intermediate or advanced programmers who feel they are not getting maximum value from the TDD approach. Anyone who is trying TDD is welcome. Anyone who has understood the urgency of adopting TDD but who is still unable to consistently code from a test-driven base should benefit. The presenters particularly welcome new adopters and those working with or leading them.
Outline
The tutorial will be handled in true XP style. What follows is a release plan, and as the class develops, it will surely flex to meet the attendees' needs. The real point of the tutorial is to provide a focused topic and bring TDD adopters face to face with an experienced practitioner for our mutual entertainment and edification. The presentation includes working programs, sample code, and a variety of tips, tricks, and techniques.
Making a Test-First Sketch
What it is:
The classes
Their relationships
Their tests
Their increments
The Hardest Question: How much detail_
Wait, Isn’t This Design_
Exercise
Breaking the testThatEverythingWorks() Trap
The UT Stack And Why It Doesn’t Work
Identifying The Borders
Delegation vs. Inheritance
Using Test-Only Constructors
Using Self-Shunt
When Is An Object Trusted_
Exercise: From
Tackling the GUI Problem
The MP3 GUI
Making A GUI Surface
Mapping real components
Working with Dumb Objects
Exercise: The MP3 GUI
Hard Questions
Open season on TDD and tools. The last hour of the tutorial will be focused on the
questions and answers that the attendees offer. Real challenges from real applications
are the order of the day.
Presenter Resume
Michael Hill has been testing first for five years, against a background of twenty+ years as an independent contractor. He is a senior mentor at Object Mentor, Inc., a job that has brought him into contact with literally dozens of differents projects and platforms. He is presently at work on a book on real-world programming. For a more complete bio see Object Mentor - Michael Hill.