Organizing Angular code for testing - angularjs

Question

So I have a decent sized angular application. This being my first Ng project, I wanted to keep it simple and had everything in one file app.js when starting out.
var app = angular.module('myApp', []);
app.factory( ... );
app.controller( ... );
...
...
As expected, this has now become hard to manage. So I decided to split the functionality within files and combine all of the files using grunt-concat. This is how my structure looks -
.
├── app.js
├── controllers
│   ├── address.js
│   ├── delivery.js
│   ├── editaddress.js
│   ├── login.js
│   └── newaddress.js
├── filters
│   └── filters.js
└── services
├── address_service.js
├── cartservice.js
├── constants.js
├── services.js
└── transformrequest.js
This has worked out quite well and its easy to manage. However, I'm quite at a loss on how to organize for testing.
For example, filters were earlier defined as
angular.module("app.services", [])
.factory('CartService', function() {
})
.factory(...)
This allowed me to write karma tests properly. Now that filters are across files, and adding
angular.module("app.services", []) in each gives an error - I am not sure how to organize my code across files and make it testable.
I looked at angular-seed, but even they have only one file for controllers, services etc.
So my question - how can I organize my code across multiple files and still make it testable in Karma.
Thanks a lot!

Answer 1

I am separating my files very similar directory structure like yours.
I am define my app in app.js:
angular.module('myApp', []);
Then in the other files you don't have to use the "app" instance. You can reference it this way:
angular.module('myApp').factory( ... );
angular.module('myApp').controller( ... );
If you use this method, you don't have to concatenate files, you can include them one by one in your html or in karma tests.
I use my camra.conf.js like this:
...
files: [
'lib/angular/angular.js',
'lib/angular-mocks/angular-mocks.js',
'src/app.js',
'src/**/*.js',
'tests/**/*.js'
],
...