If the application you are copying or modifying is a function or a panel, you can select the TEST option from either the panel for defining panels or the panel for defining functions to invoke the application. The panel or function is invoked just as if you had selected it as an option on a panel.

When you select the TEST option, the application invocations would conform as if they were running outside the Application Manager. A panel being tested can, from one of its options, invoke a panel which internally invokes the original panel being tested.

You cannot test an environment by itself. You can test an environment only through a function that uses it.