class Post < ActiveRecord::Base
The question that I want to focus on here is:
How to unit test that a certain field will be nicely formatted in the views?
more funny pictures
As Jay Fields has already explained (he focused on testing validations in his article) there are two approaches:
The first one is based on listing all the cases that are important, like whether paragraph tags are correctly inserted or whether bold tags are correct. It may be sometimes useful but for me it's a code smell that for testing a single line in your codebase you need so many test lines of code. Additionally, the acts_as_textiled plugin is nicely tested/specified so why duplicate the code? I'd rather test some of those cases in my Selenium tests or functional tests and choose the second approach:
I'm using mocha here for setting an expectation that a class method called acts_as_textiled will be called (passing the field name argument) during the load time of the class file. This solution is not ideal. I don't like hardcoding the path here but I still find it simpler that the first approach.
This way testing of things like validations and acts_as_* calls becomes much simpler.