How to profile a unit test in Netbeans?

How do you profile a unit test in Netbeans 6.9 running on Ubuntu?

My research indicates that you use the "Profile test for ..." menu item. From the main menu you can see it at: Profile : Profile Other : Profile test for Cl开发者_StackOverflow社区assName.

In my case the menu is always disabled. What do you do to enable this?

The Profile Test For File menu will only be enabled when a testable class is selected, either in the project window or opened. It will not be enabled when the test class is selected!