1. Testing JavaScript
Front Trends 2010

2. whoami
• Morgan Roderick, @mrgnrdrck
• Web developer
• First web page in 94, have used <blink>,
<marquee>, <font> ...
• Mostly freelancing since 2001
• Currently on contract with Nokia Gate5

3. • Why do we write code?
• Why should we write tests?
• Getting started with Unit Tests
Todays talk

4. Why do we write
code?

5. Famous fails!
• 1985-1987 Therac 25 Medical accelerator, 5
patients dead, several injured
• 1994 Intel Pentium floating point division
bug (FDIV). $475M
• 1998 NASA space probe Mars Climate
Orbiter burns up in atmosphere. $327.6M.

6. Moar famous fails
• 2000 National Cancer Institute, Panama
City, radiation therapy planning software, 8
patients die, 20 severely injured
• ...
• 2010 Toyota recalls cars, est. $2B
• 2010 Twitter suffers XSS attack

7. Why should we test?

8. Pick a test framework
DOH
JsUnit
QUnit
Crosscheck
J3Unit
JSNUnit
YUI Test
UnitTesting
Jasmine
screw-unit
Test.Simple
TestCase
JSTest
jsUnity
RhinoUnit
JasUnit
FireUnit
JsTestDriver
SinonJS

9. Pick a test framework
DOH
JsUnit
QUnit
Crosscheck
J3Unit
JSNUnit
YUI Test
UnitTesting
Jasmine
screw-unit
Test.Simple
TestCase
JSTest
jsUnity
RhinoUnit
JasUnit
FireUnit
JsTestDriver
SinonJS

10. JsTestDriver TestCase

11. Testing PubSubJS
http://github.com/mroderick/PubSubJS

12. PubSubJS Requirements
• Subscribe to messages
• Publish messages
• Unsubscribe from messages

13. PubSubJS Overview

14. subscribe

15. test subscribe

16. unsubscribe

17. test unsubscribe

18. test unsubscribe

19. publish

20. publish contd.

21. test publish

22. test publish

23. test publish

24. test publish

25. Thank you

26. • http://github.com/mroderick/PubSubJS
• http://code.google.com/p/js-test-driver/
• http://cjohansen.no/sinon/