Jasmine - $emit not working

I am building an Ionic app and testing it using Jasmine and Karma. All my tests are passing, but when I uncomment scope.$emit I get a failure.

Directive:

angular.module('employer')
.directive('tabsIncrease', function() {
  return {
    restrict: 'A',
    compile: function(element, attr) {
      var tabular = document.querySelector('.tabs');
      return function($scope, $element, $attr) {
        var navigate = $element[0].querySelector('.navigate');

        $scope.$on('$ionicView.beforeEnter', function() {
          tabular.classList.remove('gaining');
          navigate.classList.remove('no-tabular');       
        })
      }
    }
  };
});

Unit Test:

beforeEach(inject(function($compile, $rootScope) {

      scope    = $rootScope.$new();

      divElem = $('<div/>').addClass('tabular');
      appending = $('body').append(divElem);

      createdDirective = '<div tabs-increase></div>';

      elem   = angular.element(createdDirective);
      compilation = $compile(elem);
      compilation(scope);
      scope.$digest();

    }));

  describe('directive', function() {
    it('assign a class', function() {

      scope.$digest();
      expect(divElem.hasClass('gaining')).toBeFalsy();

      scope.$emit('$ionicView.beforeEnter');

      divElem.addClass('gaining');
      expect(divElem.hasClass('gaining')).toBeTruthy();

    });
  });

Does anyone know why scope.$emit is not working