Can't find method attach to controller with angular mock

I'm trying to implement a test with jasmine. But I have issue with the scope of my controller, I'm using the this syntax and not the $scope syntax.

It looks like this:

TeamMemberCtrl = (teamMemberService) ->
  this.getMembersInfos = () ->
    self = this
    teamMemberService.getMembersInfos().then (response) ->
      self.members = response.data.members


TeamMemberCtrl.$inject = ["teamMemberService"]
angular.module("allsquareApp").controller "TeamMemberCtrl",TeamMemberCtrl

In my test I try to call getMembersInfos like this:

    beforeEach(module('allsquareApp'))

    beforeEach inject (_$httpBackend_, _$compile_, $rootScope, $controller, $location, $injector, $timeout, assetService) ->
      @scope = $rootScope.$new()
      @assetService = assetService
      @http = _$httpBackend_
      @compile = _$compile_
      @location = $location
      @controller = $controller
      @injector = $injector
      @timeout = $timeout
      @model = (name) =>
        @injector.get(name)
      @eventLoop =
        flush: =>
          @scope.$digest()
      @sandbox = sinon.sandbox.create()

    afterEach ->
      @http.resetExpectations()
      @http.verifyNoOutstandingExpectation()


    describe 'TasksController', ->
      self = @
      beforeEach ->
        self.teamCtrl = @controller('TeamMemberCtrl')
        console.log(self.teamCtrl)
        @response = {
          "members": [
            {
              "imageLink": "landing/patrick_rahme.jpg",
              "memberName": "Patrick Rahme",
              "memberTitle": "Co-founder/CEO",
              "memberLocation": "Luxembourg / San Francisco",
              "memberEmailLink": "mailto:patrick@allsquaregolf.com",
              "memberDescription": "Patrick's passion for golf, curiosity for technology and attention to detail are at the heart of All Square. As a past national golf champion who speaks 5 languages fluently, Patrick loves to engage with people on and off the golf course.",
              "memberEmail": "patrick[at]allsquaregolf.com",
              "memberTwitter": "http://ift.tt/1ae9Tng",
              "memberLinkedin": "http://ift.tt/1A3LpC2",
              "memberGooglep": "http://ift.tt/1ae9Rf9"
            }
          ]
        }
    #    console.log(@assetService.getTeamMembersInfosPath())
        @http.whenGET(@assetService.getTeamMembersInfosPath()).respond(200, @response)


      describe 'load', ->
        it 'sets up the list of current tasks', ->

          console.log(self)
          self.teamCtrl.getMembersInfos()
          @http.flush()

The console log of the teamCtrl, it doesn't contain the definition of my method attached to this in my controller:

              function () {
                var self;
              self = this;
              return teamMemberService.getMembersInfos().then(function(response) {
              return self.members = response.data.members;
              });
              }

My error is:

            TasksController load sets up the list of current tasks
            TypeError: 'undefined' is not a function (evaluating 'self.teamCtrl.getMembersInfos()') in file:///Users/francklavisse/Documents/workspaces/rails-app/spec/javascripts/tmp/assets/app/controllers/teamMemberCtrl_spec.js (line 60)
            TypeError: 'undefined' is not a function (evaluating 'self.teamCtrl.getMembersInfos()')

EDIT1

We find that the controller is evaluating self.getMembersInfos, so it return it, that's not what we want

       TeamMemberCtrl = function (teamMemberService) {
            var self;
            self = this;
            return self.getMembersInfos = function () {
                self = this;
                return teamMemberService.getMembersInfos().then(function (response) {
                    return self.members = response.data.members;
                });
            };
        };