Ember Qunit Testing

_readme.md

I'm updating my unit tests to use the new Ember-QUnit approach and I'm running into a problem with one computed property test.

I'm trying to test that hire_date returns the correct string, but the test keeps failing with undefined is not a function. I know the setup is correct because another test, location_class, works just fine.

Can anyone offer insight as to why this is failing?

Source: 	
TypeError: undefined is not a function
    at null.<anonymous> (http://0.0.0.0:8844/app/js/application.js:146:29)
    at ComputedPropertyPrototype.get (http://0.0.0.0:8844/test/packages/ember/ember.js:4951:38)
    at get (http://0.0.0.0:8844/test/packages/ember/ember.js:2176:17)
    at Ember.Observable.Ember.Mixin.create.get (http://0.0.0.0:8844/test/packages/ember/ember.js:12425:12)
    at Object.<anonymous> (http://0.0.0.0:8844/test/model-person-test-qunit.js:26:21)
    at Object.wrapper (http://0.0.0.0:8844/test/packages/ember-qunit/dist/globals/main.js:243:27)
    at Object.Test.run (http://0.0.0.0:8844/test/packages/qunit/qunit/qunit.js:1303:18)
    at http://0.0.0.0:8844/test/packages/qunit/qunit/qunit.js:1463:10
    at process (http://0.0.0.0:8844/test/packages/qunit/qunit/qunit.js:1016:24)
    at http://0.0.0.0:8844/test/packages/qunit/qunit/qunit.js:186:5

model-person-test.js

/*=================== TESTS ====================*/
emq.globalize();
App.setupForTesting();
App.injectTestHelpers();
setResolver(
    Ember.DefaultResolver.create({
        namespace: App
    })
);
App.rootElement = '#ember-testing';

moduleForModel('person', 'Models > Person');

// this test works just fine
test('location_class is a valid computed property - non-hyphenated', function() {
    var person = this.subject({
        Location: 'Nashville'
    });
    equal(person.get('location_class'), 'nashville');
});

// this test fails
test('hire_date is a valid computed property', function() {
    var person = this.subject({
        Emmaversary: '9/24/2012'
    });
    var me = person.get('hire_date');
    equal(me, 'bob');
});

person.js

App.Person = DS.Model.extend({
    First: DS.attr('string'),
    Last:  DS.attr('string'),
    Department:  DS.attr('string'),
    Team:  DS.attr('string'),
    Title:  DS.attr('string'),
    Location:  DS.attr('string'),
    Direct:  DS.attr('string'),
    Extension:  DS.attr('string'),
    Cell:  DS.attr('string'),
    IM:  DS.attr('string'),
    Email: DS.attr('string'),
    Emmaversary: DS.attr('date'),

    hire_date: function(){
        var hire_date = this.get('Emmaversary'),
            months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
            day = hire_date.getDate(),
            month = months[hire_date.getMonth()],
            year = hire_date.getFullYear();
        return '%@ %@, %@'.fmt(month, day, year);
    }.property('Emmaversary'),

    location_class: function(){
        var location = this.get('Location');
        return location.replace(' ', '-').toLowerCase();
    }.property('Location')
});

What happens if you stick a debugger statement in hire_date and have a poke around or step through it? Are all the things you are invoking i.e. anything preceeding () as expected?