Test Drive Development with WordPress

How to go about doing TDD with WordPress

Transcript

1. The secret to coding with confidence
   Test Driven Development
   with WordPress
   1
   

   View Slide

2. What is TDD?
   • Getting into the habit of writing tests before
   writing code.
   • TDD are continuous short cycle of test, code,
   refactor.
   • Test cases are in separate files. No more print_r &
   var_dump in your code!
   • The tests contain assertions that are either true or
   false. Passing the tests confirms correct behavior
   of the code.
   2
   

   View Slide

3. View Slide

4. Why TDD?
   • TDD gives you higher confidence that your
   code is doing what it's suppose to.
   • Small wins makes the coding process more
   enjoyable (Gamification).
   • Working code every step of the way!
   4
   

   View Slide

5. TDD Process
   1 Feature
   specifications
   2 Write test cases
   3 Tests will fail
   4 Write code to pass
   the tests (minimal)
   5 Pass all tests
   6 Refactor
   "Make it green, then make it clean"
   5
   

   View Slide

6. • PHPUnit is the de-facto standard for unit
   testing in PHP projects. It provides both a
   framework that makes the writing of tests easy
   as well as the functionality to easily run the
   tests and analyse their results.
   • http://phpunit.de
   • Created by Sebastian Bergmann
   6
   

   View Slide

7. WordPress Unit Tests
   • Core libraries unit tests
   • http://unit-tests.trac.wordpress.org/wiki
   • Plugins Development
   • Nikolay Bachiyski (https://github.com/nb/wordpress-
   tests)
   • Themes Development
   • http://codex.wordpress.org/Theme_Unit_Test
   7
   

   View Slide

8. WordPress Unit Tests
   • Nikolay Bachiyski
   • https://github.com/nb/
   wordpress-tests
   • http://wordpress.tv/
   2011/08/20/nikolay-
   bachiyski-unit-testing-will-
   change-your-life/
   8
   

   View Slide

9. Demo
   9
   

   View Slide

10. Demo Script
    • Installing PHPUnit.
    • Checkout unit tests
    • Sample Unit Test for a WP Plugin.
    10
    

    View Slide

11. Installing PHPUnit
    # pear config-set auto_discover 1
    # pear install pear.phpunit.de/PHPUnit
    11
    

    View Slide

12. Sample Code
    https://github.com/miccheng/WordPress-TDD
    12
    

    View Slide

13. End of File
    13
    

    View Slide