Unit Testing Apache Filter with Spring Mock and Mockito

1. Unit Testing Coursesites

2. Context PublicHomePageRedirector public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { //on request to the site / or index.html redirect to the servlet //we only want to hit on / HttpServletRequesthttpRequest = (HttpServletRequest)request; HttpServletResponsehttpResponse = (HttpServletResponse)response; String serverName = httpRequest.getHeader("Host"); intfirstperiodIndex = serverName.indexOf('.'); intlastperiodIndex = serverName.lastIndexOf('.'); /* * so for wayank12teacher2.coursesites-stage.com * hostHeader will be wayank12teacher2 setting the stage to check whether * to forward to homepage.jsp or redirects to pages/index.html as in the past */ String hostHeader = serverName.substring(0, firstperiodIndex).toLowerCase();

3. “No class is an island …” PublicHomePageRedirectorcollaborates with (depends on) ServletRequest ServletResponse FilterChain

4. Context..(2) /* taking care of missing www in the request * aka coursesites-stage.com, coursesites.com * making sure that redirects from OpenID login through Facebook or Twitter * happen flawlessly * */ if (!serverName.startsWith("www") && (firstperiodIndex == lastperiodIndex)) { String responseUrlPath = "https://" + "www." + serverName + "/webapps/Bb-sites-course-creation-BBLEARN/pages/index.html"; httpResponse.sendRedirect(responseUrlPath); return; }

5. Context…(3) else if (serverName.equalsIgnoreCase("coursesites.blackboard.com")){ serverName = "coursesites.com"; String responseUrlPath = "https://" + "www." + serverName + "/webapps/Bb-sites-course-creation-BBLEARN/pages/index.html"; httpResponse.sendRedirect(responseUrlPath); return; }

6. Scenario(s) Request with missing www (1) Request from coursesites.blackboard.com (2)

7. Unit Test Junit (command line through Ant) Mock (for collaborators  ServletRequest, ServletResponse, Chain)

8. TestCase(s) public class CourseSitesFilterTest { @Test public void testMissingWWW() throws Exception{ … } @Test public void testBlackBoardDomain() throws Exception{ …}

9. Scenario 1 public void testMissingWWW() throws Exception{ MockHttpServletRequest request = new MockHttpServletRequest(); MockHttpServletResponse response = new MockHttpServletResponse(); //request.setMethod("GET"); request.addHeader("Host","coursesites.com"); //MockHttpServletRequest request = new FilterChain chain = Mockito.mock(FilterChain.class); CourseSitesFilter filter = new CourseSitesFilter(); filter.doFilter(request, response, chain); //System.out.println(request.getAttribute("hello")); //System.out.println(request.getRequestURI()); //System.out.println(response.getForwardedUrl()); System.out.println("Output: " + response.getRedirectedUrl()); assertTrue("Redirects to index.html", response.getRedirectedUrl().contains("index.html")); }

10. Scenario 2 public void testBlackBoardDomain() throws Exception{ MockHttpServletRequest request = new MockHttpServletRequest(); MockHttpServletResponse response = new MockHttpServletResponse(); //request.setMethod("GET"); request.addHeader("Host","coursesites.blackboard.com"); //MockHttpServletRequest request = new MockHttpServletRequest("GET", "/invoiceView.app"); FilterChain chain = Mockito.mock(FilterChain.class); CourseSitesFilter filter = new CourseSitesFilter(); filter.doFilter(request, response, chain); //System.out.println(request.getRequestURI()); //System.out.println(response.getForwardedUrl()); System.out.println("Output: " + response.getRedirectedUrl()); assertTrue("Redirects to index.html", response.getRedirectedUrl().contains("index.html")); }

11. Junit/Ant <target name="junit" depends="compile"> <mkdir dir="${report.dir}"/> <junitprintsummary="yes" haltonfailure="yes" showoutput="yes"> <classpath> <path refid="classpath"/> <path location="${build.dest}"/> <path location="${build.test.dest}"/> </classpath> <formatter type="xml"/> <batchtest fork="yes"> <fileset dir="${test.dir}" includes="**/*Test.java"/> </batchtest> </junit> </target>

12. Results