title: Trigger resizable in jasmine
body: <p>I make some unit test in my angular project with karma and jasmine.</p>
  
  <p>In a directive I have a resizable jquery-ui function on an element : </p>
  
  <pre><code>element.find(".wt-tools-content").resizable({
                  resize: function (event, ui) {
                     my_action
                  }
              });
  </code></pre>
  
  <p>And I can't trigger it in my test with jasmine, I try :</p>
  
  <pre><code>element.find(".wt-tools-content").trigger('resizable');
  element.find(".wt-tools-content").resizable().trigger('resize');
  </code></pre>
  
  <p>And so many combination but I can't find how I can't trigger and test the code inside the resize function.
  I'm sure element in the directive and element in the jasmine test file is the same ;)</p>
  
  <p>Someone can help me ?</p>
  
  <p>Thank you ;)</p>