QA:Testcase Gnome Accessibility

How to test

1. Toggle any of the settings in the accessibility menu, in particular try zoom, screen reader and screen keyboard
2. Open the univeral access settings, and use the settings in the zoom options dialog
3. Toggle the "Enable by keyboard" switch on the typing tab and hold down the Shift key for at least 8 seconds

Expected Results

1. All accessibility functions should turn on and work in response to the menu toggles (no re-login necessary)
2. All zoom options should have the expected effect; the zoom should not make the system unusably slow
3. A notification should tell you that slow keys were turned on, and offer you to turn it off or keep it