updated: modified testing.rst

doc/testing.rst

@@ -73,8 +73,11 @@ use it by making your test extend it::
         ...
     }
 
-To make your application testable, you need to make sure you follow "Reusing
-applications" instructions from :doc:`usage`.
+.. note::
+
+    To make your application testable, you need to make sure you follow "Reusing
+    applications" instructions from :doc:`usage`.
+    If you want to test single file app use Symfony2's Reqeuest instead.
 
 For your WebTestCase, you will have to implement a ``createApplication``
 method, which returns your application. It will probably look like this::