decojs/Specs/Modules/for_proclaimWhen/when_unsubscribing_from_an_event.js

Scalable frontend architecture

describe("when unsubscribing from an event", ["deco/proclaimWhen"], function(proclaimWhen){

  
  var when,
    proclaim,
    spyOnIt;
  
  beforeEach(function(){
    spyOnIt = sinon.spy();
    when = proclaim = proclaimWhen.extend({
      somethingHappens: function(){}
    })
    when.somethingHappens(spyOnIt);
    
    because: {
      when.somethingHappens.dont(spyOnIt);
    }
  });
  
  it("should NOT call the function when an event is published", function(){
    proclaim.somethingHappens();
    expect(spyOnIt.calledOnce).toBe(false);
  });

  describe("multiple times", function(){

    var spyOnItAgain = sinon.spy();

    beforeEach(function(){
      when.somethingHappens(spyOnItAgain);
      because:{
        when.somethingHappens.dont(spyOnIt);
      }
    });

    it("should not do anything", function(){
      when.somethingHappens.dont(spyOnIt);
    });

    it("should not remove other event listeners", function(){
      proclaim.somethingHappens();
      expect(spyOnItAgain.calledOnce).toBe(true);
    });  
  });
});