AngularJS: Simple Tooltip

HTML

<script src="http://ci.angularjs.org/job/angular.js-angular-master/ws/build/angular.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-tooltip.js"></script>
<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<h1>Tooltips</h1>
<p>Here is some text with a <a testing="This should be displayed as a popover.">tooltip</a>.</p>

JavaScript

angular.module('app', []).directive('testing', function() {
    return function(scope, elm, attr) {
        elm.tooltip();
    };
});