using sinon to stub a method

gistfile1.coffee

sinon = require 'sinon'
should = require 'should'

class LaserGun
	fireAt: (alien) ->
		console.log "ZAP"

class BuckRogers
	constructor: (@laserGun) ->
	attack: (alien) ->
		@laserGun.fireAt(alien)

describe "Buck Rogers", ->
	# sinon is designed around just stubbing a particular method
	it "should fire his laser at the alien when he attacks", ->
		alien = {}
		laser = new LaserGun
		stub = sinon.stub laser, "fireAt"

		buck = new BuckRogers(laser)
		buck.attack(alien)
		stub.calledWith(alien).should.be.true