Document `WP_UnitTestCase`

[tomjn]

Add a section to testing about WP_UnitTestCase

A writeup of the class is here

[obstschale]

Great Article. I can explain TDD, Unit Tests, and Integration Test in general. I will see when I can send a pull request for that.

[tomjn]

There's also https://github.com/10up/wp_mock and http://greg.harmsboone.org/blog/2014/01/01/writing-unit-tests-for-wordpress

Someone needs to write up an outline or skeleton of how the testing section should work. I think it's an important subject to cover or at least mention and demystify testing

[obstschale]

I couldn't write anything yet. Even my time is limited and I'm in the middle of my bachelor thesis. 😓 I have now some spare time and will push a first skeleton here in a few minutes.

Thx for the resources. I will read them later.

[tomjn]

Of note the page is at:

http://www.wptherightway.org/en/testing/wp_unittestcase.html

And the file that needs updating is at:

https://github.com/Tarendai/WordPress-The-Right-Way/blob/master/en/testing/wp_unittestcase.md