ServletUnit... Where have you been all my life?

Thanks to Joen Moreno for pointing me to this! ServletUnit is a part of HttpUnit. It allows you to test your web components without having to deploy into a container! It comes with its own container simulator! For example, if I have this Servlet:

public class TheServlet extends HttpServlet {
 protected void doGet(HttpServletRequest req, HttpServletResponse res)
         throws ServletException, IOException {
     final String param = req.getParameter("param");
 final PrintWriter writer = res.getWriter();
 if(param != null) {
     writer.write("the parameter: " + param);
 } else {
     writer.write("no parameter");
     }
 writer.flush();
 }
}

My ServletUnit test code can be something like this:

public class ServletTest extends TestCase {
  public void testGet() throws Exception {
 final ServletRunner runner = new ServletRunner();
 runner.registerServlet("myServlet", TheServlet.class.getName());
 final ServletUnitClient client = runner.newClient();
 final WebRequest req = new GetMethodWebRequest("http://localhost/myServlet");
 final String paramSent = "swak";
 req.setParameter("param", paramSent);
 final WebResponse res = client.getResponse(req);
 assertEquals("the parameter: " + paramSent, res.getText());
  }
}

It's just an ordinary JUnit TestCase!