We should test only the part we want to test, especially on unit test, and don't have to be responsible for other parts. Mock other parts as if they are black boxes. The library used here is SinonJS. I only mentioned stub here.

1. Testing Black Box
測試黑盒子
2015.01.15 Mak

2. Architect

3. Sinon.JS
• spy: monitor functions
• stub: fake functions
• mock: fake functions + verified
• fake timer, server, …etc

4. Sinon.JS
sinon = require(“sinon”)
before (done) ->
sinon.stub BlackBoxService, “methodName”, (arg1, arg2 … argN) ->
# Expecting output
done()
after (done) ->
BlackBoxService.methodName.restore()
done()

5. Example

6. Reference
• Sinon.JS
http://sinonjs.org/
• Unit Test like a Secret Agent with Sinon.js
http://www.elijahmanor.com/unit-test-like-a-
secret-agent-with-sinon-js/
• Unit Testing Sails Js: How to mock SailsJS
Services in Controllers
https://blog.sergiocruz.me/unit-testing-sails-
js-how-to-mock-sailsjs-services-in-controllers/