AngularJS Test a Factory with Mocha

I am new to Mocha and AngularJS Unit Testing but want to test my application using Mocha. I have basic language tests working, but I cannot run tests against my applications Factory or Controller.

I have the following basic files.

apps.js

aangular.module('MyApp', []);

file1.js

angular.module('MyApp').factory('Factory1' ...);

file2.js

angular.module('MyApp').factory('Factory2' ...);
angular.module('MyApp').factory('Controller' ...);

describe('Main Test', function() {
    var FactoryToTest;
    beforeEach(module('MyApp'));

    beforeEach(inject(function (_Factory_) {
        FactoryToTest = _Factory_;
    }));

    describe('Factory2', function () {
        it('should return "unknown"', function () {
            Game = {};
            expect(new Factory2(Game)).to.equal('unknown');
        });
    });
});

When I run the test, it generates an error, and I am not sure what to fix to get this to work.

Error:

Message:
    object is not a function
Stack:
TypeError: object is not a function
    at Suite.<anonymous> (b:\app\test.js:5:16)