added a convenience method

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

@@ -671,6 +671,13 @@ public abstract class HudsonTestCase extends TestCase implements RootAction {
         return new WebClient().search(q);
     }
 
+    /**
+     * Hits the Hudson system configuration and submits without any modification.
+     */
+    protected void configRoundtrip() throws Exception {
+        submit(createWebClient().goTo("configure").getFormByName("config"));
+    }
+
     /**
      * Loads a configuration page and submits it without any modifications, to
      * perform a round-trip configuration test.