title: Can I call the original method inside the supplied function to "andCallFake" of a Jasmine spy?
body: <p>I could save the original method in a variable in beforeEach, and then restore it in afterEach, but maybe I can use a spy which will be reset automatically between test suites.</p>
  
  <pre><code>spyOn(Ext, "create").andCallFake(function(className){
      if (className === 'Waf.view.Viewport')
          // call the original Ext.create method
  });
  </code></pre>
  
  <p>Is this possible? I am using Jasmine 1.3</p>