jasmine-given example

makes_sandwiches.coffee

class MakesSandwiches
  make: -> cheese: "swiss", bread: "sourdough"

makes_sandwiches_spec.coffee

#jasmine-given
describe "MakesSandwiches", ->
  Given -> @subject = new MakesSandwiches
  describe "#make", ->
    When -> @sandwich = @subject.make()
    Then -> expect(@sandwich).toHave("bread")
    Then -> expect(@sandwich).toHave("cheese")

#vanilla jasmine
describe "MakesSandwiches", ->
  beforeEach -> 
    @subject = new MakesSandwiches
  describe "#make", ->
    beforeEach ->
      @sandwich = @subject.make()
    it "has bread", ->
      expect(@sandwich).toHave("bread")
    it "has cheese", ->
      expect(@sandwich).toHave("cheese")

#a custom matcher for toHave()'ing properties.
beforeEach ->
  @addMatchers
    toHave: (property) ->
      @actual.hasOwnProperty(property)