javascript - Adding properties to an object using function and bracket notation -

i have assignment on basic javascript class i'm taking , can't seem work. have unit test given me:

describe('addsixthproperty', function() {       it('should add food property value of bbq using bracket notation', function() {         expect(objects.addsixthproperty()['food']).to.equal('bbq');       });     }); 

i given empty function:

// don't touch line var mysticalanimal = objects.mysticalanimal(); function addsixthelement(){  return } 

so tried this:

var mysticalanimal = objects.mysticalanimal(); objects.addsixthproperty = function(){   mysticalanimal['food'] = "bbq";   return mysticalanimal["food"]; }; 

it doesn't work. our test page doesn't pass that. appreciated!

thanks in advance!

you're returning mysticalanimal['food'], , test tries access ['food'] again, ends accessing 'bbq'['food'], undefined. need return mysticalanimal, letter cases right. here's little proof of concept:

var objects = (function() {    var animal = { mystical: true };        return {      mysticalanimal: function() { return animal; }    };  })();    var mysticalanimal = objects.mysticalanimal();    objects.addsixthproperty = function(){    mysticalanimal['food'] = "bbq";    return mysticalanimal;  };    var capturedanimal = objects.addsixthproperty();    document.getelementbyid('result').innertext = capturedanimal['food'];

<p id="result" />