ember model unit test error

undefined-cache-subject.js

//tests/unit/models/proposal.js
/* jshint expr:true */
import {
  describe,
  describeModule,
  it,
  beforeEach,
  afterEach
} from 'ember-mocha';
import { expect } from 'chai';
import Resource from '../../../models/proposal';

var supports;

describeModule('model:proposal', 'Unit | Model| Proposal',{}, function() {
  beforeEach(function() {
    Resource.prototype.container = this.container;
    // Use a non-standard name, i.e. pluralized instead of singular
    this.container.register('model:proposalz', Resource, {});
  });

  afterEach(function() {
    delete Resource.prototype.container;
  });

  describe('#toggleSupport', function() {
    describe('when proposal is not supported yet', function() {
      it('adds a support to it', function() {
        expect(this.subject().get('supports')).to.eql([]);
        this.subject().toggleSupport;
        expect(this.subject().get('supports')).to.eql(supports);
      });
    });
  });
});


//error
not ok 65 PhantomJS 1.9 - Unit | Model| Proposal TestLoader Failures client/tests/unit/models/proposal-test: could not be loaded
    ---
        message: >
            'undefined' is not a function (evaluating 'ember_mocha.beforeEach')
        stack: >
            TypeError: 'undefined' is not a function (evaluating 'ember_mocha.beforeEach')
                at http://localhost:7357/assets/client.js:2629
                at moduleBody (http://localhost:7357/assets/test-support.js:1833)
                at http://localhost:7357/assets/test-support.js:14773
                at createModule (http://localhost:7357/assets/test-support.js:1838)
                at describeModule (http://localhost:7357/assets/test-support.js:1732)
                at http://localhost:7357/assets/client.js:2644
                at http://localhost:7357/assets/vendor.js:150
                at tryFinally (http://localhost:7357/assets/vendor.js:30)
                at http://localhost:7357/assets/vendor.js:156
                at http://localhost:7357/assets/test-loader.js:29
                at http://localhost:7357/assets/test-loader.js:21
                at http://localhost:7357/assets/test-loader.js:40
                at http://localhost:7357/assets/test-support.js:14840

@oliverbarnes yeah the way I have the beforeEach in the EJR blueprint is specifically for the Ember-QUnit test module setup and teardown. So with Mocha that is done differently, more BDD like syntax.