Why should we test? Why don't we test (more)? How do we test?

1. AUTOMATED TESTING
The 'what', 'when', 'why' and 'how'
“If you don’t like unit testing your product, most likely your
customers won’t like to test it either.” - Anonymous

2. WHY NOT?
Slower feature development
It's too hard
I don't really need tests, my code is fine
QA will find my bugs
I'll do it later

3. WHY?
Re-evaluate your code (DDT)
Plan out your code (TDD)
Slow down
Important w/ JavaScript

4. LONG-TERM BENEFITS
Easier to refactor
Prevent regressions
Documentation

5. WHEN?
Test Driven Development
Development Driven Testing

6. HOW?
Jasmine
Mocha
QUnit
Karma*
Spock
TestNG / JUnit

7. END-TO-END TOOLS
Geb
Protractor
Watir

8. WRITING TESTABLE CODE
Separation of concerns
Small methods
Modularization

9. WHAT?
Your code
3rd-party code
Anything non-trivial

10. ANGULAR
Controllers (unit)
Services (unit)
Filters (unit)
Directives & views (e2e)

11. ALL OF YOUR CODE
/^JS[LH]int$/

12. JSHINT VS JSLINT
JSLint is less opinionated & more practical

13. JSHINT IS IMPORTANT
For common "newbie" mistakes
For typos

14. EXAMPLE JSHINT WARNINGS
simple bad references
for in loops w/out hasOwnProperty
no brackets around loop/conditional body
=== vs ==
hoisting issues
complexity
loops inside functions
+ 63 more

15. LINKS AND NOTES
modern.IE / IEVMs
defensive checks in JS
JSHint
Spock