getNamedDispatcher and named JSP pages

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I needed to unit test an app that used getNamedDispatcher to reference
a named jsp page. So, the servlet does something like:

     RequestDispatcher errorPage =
getServletContext().getNamedDispatcher("errorPage");
     errorPage.forward(request, response);

Where "errorPage" is defined in the web.xml as:

  <servlet>
    <servlet-name>errorPage</servlet-name>
    <display-name>Generic Error Page</display-name>
    <jsp-file>/errorPage.jsp</jsp-file>
  </servlet>

Anyway, I've used httpunit before and am happy with it, but I was
surprised to find that getNamedDispatcher wasn't implemented, so I
patched up something quick to make it work (for me, ymmv).

    http://pastebin.com/f15093292

--0016e6475cca9692f8047bcb66d5
Content-Type: application/octet-stream; 
	name="NamedRequestDispatchers_and_NamedJSPFiles.patch"
Content-Disposition: attachment; 
	filename="NamedRequestDispatchers_and_NamedJSPFiles.patch"
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X-Attachment-Id: f_g3re4br50

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