how to unit test a ngcontroller with external dependencies in jasmine?

I am trying to write a karma unit test for a angularcontroller, this is the controller. Using a fileupload from here (http://ift.tt/1aM2BiP):

var c, di;

c = function($scope, FileUploader, UploadHelper, currentUser) {
  var uploader;

  $scope.uploader = uploader = new FileUploader(UploadHelper.getOptions());

  uploader.onSuccessItem = function(item, response, status, headers) {
    //do something
  };
  return this;
};

di = [ '$scope', 'FileUploader', 'UploadHelper', 'currentUser', c];

angular.module('mycontrollers').controller('DocumentsController', di);

My jasmine test looks like this:

describe('Customer: Controller: DocumentsController', function() {
  var $rootScope, DocumentMock, UserMock, documentsController, scope;
  documentsController = $rootScope = scope = DocumentMock = UserMock = null;

  beforeEach(function() {
    module("mycontrollers");
    return inject(function($controller, _$rootScope_, $q) {
      var deferred, documents, fileUploader, uploadHelper, user;
      $rootScope = _$rootScope_;
      scope = $rootScope.$new();
      documents = [
        {
          id: "doc 1",
          documentType: "other"
        }, {
          id: "doc 2",
          documentType: "pdf"
        }, {
          id: "doc 3",
          v: "pdf"
        }
      ];
      user = {
        id: 'user_id',
        username: 'username'
      };
      UserMock = {
        currentUser: function() {
          return user;
        }
      };
      fileUploader = {};
      uploadHelper = {};

      return documentsController = $controller('DocumentsController', {
        documents: documents,
        $scope: scope,
        FileUploader: fileUploader,
        UploadHelper: uploadHelper,
        currentUser: UserMock

      });
    });
  });
  return describe("On creation", function() {
    return it("should assign documents to scope", function() {
      return expect(1).toEqual(1);
    });
  });
});

The problems start on the line with $scope.uploader. I get an error like this:

'DocumentsController not defined'

Question is how I can mock functions like uploaderHelper.getOptions in my test so this unit test will be successful?