TDD Talk Slides

A short overview of various test double helpers provided by RSpec

Transcript

1. Gentle Isolation
2. double A simple object that stands in place of any other object. (Think of stunt doubles)
3. instance_double A simple object that stands in place of an object. It verifies that the described double matches the object it stands for. (Verifying double)
4. mock_model A test double object expanded with ActiveModel and ActiveRecord API. Includes real functionality of AM/AR methods. Good for testing interactions with AR/AM objects.
5. stub_model The real AR/AM object, with some mechanisms stubbed. Builds on top of the existing models, uses the real app code. Good for state-based tests. WARNING: In some cases can result in the actual DB calls.
6. build_stubbed The real AR object that's build with FactoryGirl. If FactoryGirl defines dependencies they will be created. Only persistence mechanisms are stubbed.