AngularJS unstable template

var app = angular.module('plunker', []);

app.controller('MainCtrl', function($scope) {
  $scope.name = 'World';
});

app.directive('objectList', function ($compile) {
  return {
    template: 'OK',
    link: function (scope, element, attrs) {
      var tmpElement = $compile('<my-message></my-message>')(scope);
      console.log('HTML: "' + tmpElement.html() + '"');
      
      if (tmpElement.html() !== '') {
        alert('Found element!');
      }
    }
  };
});

app.component('myMessage', {
  templateUrl: 'my-message.tpl.html',
  controller: function ($injector) {
    var existDire = $injector.has('myMessageDirective');
    var existComp = $injector.has('myMessageComponent');
    console.log(existDire, existComp);
  }
})

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.1.x" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.js" data-semver="1.5.8"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <div object-list></div>
  </body>

</html>

/* Put your css in here */

This is my message.