title: jasmine spyOn angularjs internal methods such as $filter('date')
body: <p>Please see the code in </p>
  
  <p><a href="http://jsfiddle.net/2Ny8x/69/">http://jsfiddle.net/2Ny8x/69/</a></p>
  
  <p>I wonder how I can add another spy to spyOn the method returned by $filter('date') so that I can verify </p>
  
  <pre><code>expect(something, something).toHaveBeenCalledWith('1234', 'dd-MMM-yyyy');
  </code></pre>