Write Unit test case using HttpServlet - unit-testing

Question

I have this unit test, it compiles and runs well. How can I represent this in a test case document for my unit test (Id, purpose, preconditions, input and expected output). What would be the input and output since I don't know the actual input of the httpservletrequest and don't know either the response (httpservletresponse). I just mocked these objects so I can perform my unit test. I was planning to do 'AssertEquals' but I don't know what could be the expected output.
#Test
public void testSearchPanelists() throws IOException {
HttpServletRequest req = Mockito.mock(HttpServletRequest.class);
HttpServletResponse res = Mockito.mock(HttpServletResponse.class);
HttpSession hs = Mockito.mock(HttpSession.class);
PowerMockito.mockStatic(SearchPanelist.class);
Controller.searchPanelists(req, res, hs);
PowerMockito.verifyStatic(SearchPanelist.class);
SearchPanelist.searchPanelists(req,res,hs);
}
I have this in Controller class:
public static void searchPanelists(HttpServletRequest req, HttpServletResponse res, HttpSession hs) throws IOException
{
SearchPanelist.searchPanelists(req, res, hs);
}
and this in SearchPanelist class:
public static void searchPanelists(HttpServletRequest req, HttpServletResponse res, HttpSession hs) throws IOException
{
HashMap<String, String> searchCriteria = new HashMap<String, String>();
//Let's pull the values from the search form.
searchCriteria.put("FirstName", req.getParameter("pFName"));
searchCriteria.put("LastName", req.getParameter("pLName"));
searchCriteria.put("Institution", req.getParameter("pInstitution"));
searchCriteria.put("Address", req.getParameter("pAddress"));
searchCriteria.put("City", req.getParameter("pCity"));
searchCriteria.put("State", req.getParameter("pState"));
searchCriteria.put("ZipCode", req.getParameter("pZip"));
searchCriteria.put("Telephone", req.getParameter("pTelephone"));
searchCriteria.put("Email", req.getParameter("pEmail"));
searchCriteria.put("Gender", req.getParameter("pGender"));
searchCriteria.put("Ethnicity", req.getParameter("pEthnicity"));
searchCriteria.put("Expertise", req.getParameter("pExpertise"));
searchCriteria.put("ISCID", req.getParameter("pISCID"));
ArrayList<PanelistProfile> userProfile = DBManager.getPanelists(searchCriteria);
if(userProfile == null)
res.sendRedirect("messagePage?messageCode=No Panelists Found.");
else
{
hs.setAttribute("Panelists", userProfile);
res.sendRedirect("displayPanelists.jsp");
}
}