Test-Driven Development with Visual Studio 2010

17-20 OCTOBER 2011
DURBAN ICC

Test Driven Development
It’s All about Fluency
@LlewellynFalco & @LynnLangit

Is Testing Faster? (Test After)
60 Minutes
Work (code)
X minutes
Non-Work(tests)
<
Code
60 Minutes
Code + Test
60 + X minutes

Is Testing Faster? (Test 1st)
30 Minutes
Work (code)
X minutes
Non-Work(tests)
<
?
Code
60 Minutes
Test + Code
X + 30 minutes

Today’s Kata: Triangle
A side has a distance
Side knows endpoints
3 points
3 sides
Perimeter
Get sides touching a point
Get side opposite a point
The angle of 2 sides touching a point
3 angles
Right Triangle

Parts of a Test
Do
Verify

Benefits of Unit Tests
Specification
Feedback
Regression
Granularity

Intentional Code
// Create a Side from (0,0) to (5,0)
var side =new Side(0,0,5,0);

Consume 1st
Write the objects & methods you wish existed

Test Until Bored
Test the cases that bring you value

Verification
Is it the right answer?
Change the Question
Ask an expert

Completing the Circle
Your output should tell the story.
Objects should have ToStrings
Benefits
Specification
Feedback
Regression
Granularity

Fake it Till You Make It
Buys some time
Allows for Triangulation

Verifying Multiples
Verify Single:
Approvals.Approve(result);
Verify Many:
Approvals.Approve(results,"label");

Multiple Cases
Approvals.Approve(cases, c =>TestWith(c));

Maintaining Tests
Same Quality as Production Code

Resources
Test Driven Development: By Example
Kent Beck

Resources
www.ApprovalTests.com

Resources
www.Develop.com
Intro To TDD Class (4 Day)
Legacy Code
SQL Server (Dev, BI)
SQL Azure

TeachingKidsProgramming.org
Do a Recipe  Teach a Kid (Ages 10 ++)
Microsoft SmallBasic  Free Courseware (recipes)

Contact Information
@LlewellynFalcohttp://LlewellynFalco.Blogspot.com
http://www.approvaltests.com
@LynnLangit
http://www.LynnLangit.com

http://microsoftvirtualacademy.com
Submit your session evaluation for a chance to win!
Sponsored by MVA

Creating
the future
together

http://lynnlangit.wordpress.com	448
http://paper.li	8
http://coderwall.com	8
http://a0.twimg.com	3
http://newsmixmedev.cloudapp.net	2

Test-Driven Development with Visual Studio 2010

by Lynn Langit on Oct 17, 2011

Accessibility

Categories

Tags

Upload Details

Usage Rights

5 Embeds 469

Statistics

Test-Driven Development with Visual Studio 2010 — Presentation Transcript