Angular Directive template unit testings

directives.js

module.directive("speechBubble", [function() {

  function link(scope, element, attrs) {

    function updateText(values) {
      var text;
      try {
        text = "Drop and Give Me "+values.reduce(function(acc, i) { return acc + i;}, 0) + "!";
      } catch (e) {
        text = "Beat your face!";
      }
      element.find("div.speech").text(text);
    }

    scope.$watch('workout', function(values, oldValues){
      updateText(values);
    });

    updateText();
  }

  return {
    restrict: 'E',
    templateUrl: '/templates/speechBubble.html',
    link: link,
    scope: {
      workout: "=" 
    }
  }
}]);

directiveSpec.js

describe('directives', function() {
  beforeEach(angular.mock.module('dgmt.ui.elements'));
  var rootScope;
  var element;

  describe('speech-bubble', function(){
    beforeEach(angular.mock.module('/templates/speechBubble.html'));

    beforeEach(inject(function($compile, $rootScope) {
        rootScope = $rootScope;
        element = $compile("<speech-bubble workout='workout'/>")($rootScope);  
        $rootScope.$digest();
    }));

    it('should display default message without workout', function() {
      expect(element.html()).toContain("Beat your face!");
    });

    it('should display a total count message', function() {
      rootScope.workout = [1,1,1,1]; 
      rootScope.$digest();

      expect(element.html()).toContain("Drop and Give Me 4!");
    });
  });
...

karma-unit.conf.js

module.exports = function(config) {
  config.set({
    basePath: '../',
    files : [
      'lib/jquery.js',
      'lib/angular.js',
      'lib/angular-*.js',
      'app/scripts/**/*.js',
      'test/unit/**/*.js',
      'app/templates/*.html'
    ],
    
    exclude: [
      'lib/angular-loader.js',
      'lib/angular-scenario.js',
    ],
    
    ngHtml2JsPreprocessor: {
      stripPrefix: 'app'
    },

    frameworks: ['jasmine'],

    browsers: ['PhantomJS'],

    reporters: ['spec'],

    preprocessors: {
      'app/templates/*.html': 'ng-html2js'
    },


    colors: true
  });
};