added another convenience method.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@31038 71c3de6d-444a-0410-be80-ed276b4c234a

test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java

@@ -653,6 +653,16 @@ public abstract class HudsonTestCase extends TestCase implements RootAction {
         return new WebClient().search(q);
     }
 
+    /**
+     * Loads a configuration page and submits it without any modifications, to
+     * perform a round-trip configuration test.
+     * @see http://wiki.hudson-ci.org/display/HUDSON/Unit+Test#UnitTest-Configurationroundtriptesting
+     */
+    protected <P extends Job> P configRoundtrip(P job) throws Exception {
+        submit(createWebClient().getPage(job,"configure").getFormByName("config"));
+        return job;
+    }
+
 
 
     /**