Angular test failing to instantiate module with Jasmine and Karma - angularjs

Question

I have setted up a test environment with Angular 1.6.6, ng-mock 1.6.6, Jasmine and Karma. But even with the easiest test I'm getting a [$injector:modulerr] when trying to inject the deloreanApp module
Failed to instantiate module deloreanApp due to: Error:
[$injector:nomod]
Theoretically there aren't tipo errors and Angular and ng-mock versions matches.
My files are:
app.js
(function () {
"use strict";
// initialize Angular
angular.module('deloreanApp', ['deloreanApp.controllers', 'deloreanApp.services']);
angular.module('deloreanApp.controllers', []);
angular.module('deloreanApp.services', []);
})();
controllers.js
(function () {
"use strict";
function deloreanController($scope){
$scope.sum = function(a,b){
return a + b;
}
}
angular.module('deloreanApp.controllers', []).controller('DeloreanController', ['$scope', deloreanController] );
})();
DeloreanController.test.js
describe('calculator', function () {
beforeEach(module('deloreanApp'));
var $controller;
beforeEach(inject(function (_$controller_) {
$controller = _$controller_;
}));
describe('sum', function () {
it('1 + 2 should equal 3', function () {
var result = 3;
expect(result).toBe(3);
});
});
});
And part of my karma.conf.js file:
// list of files / patterns to load in the browser
files: [
'lib/angular.min.js',
'lib/angular-mocks.js',
'js/app.js',
'js/controllers.js',
'tests/DeloreanController.test.js'
],

Answer 1

Try this,
(function () {
"use strict";
angular.module('deloreanApp.controllers', []);
angular.module('deloreanApp.services', []);
// initialize Angular
angular.module('deloreanApp', ['deloreanApp.controllers', 'deloreanApp.services']);
})();