Chapter 5 - 5.1. Example unit test for the EchoServlet
Chapter 5 - 5.2. Example Servlet echoing request parameters
Chapter 5 - 5.3. First test for the LoginServlet
Chapter 5 - 5.4. Our first cut at the LoginServlet (reject any login attempt)
Chapter 5 - 5.5. Sketch of our next test, verifying that a valid login attempt succeeds