This test just makes sense if webkit was build with NO_LISTBOX_RENDERING enabled.
You should see in the following table three comboboxes and no listboxes.
At the right cell you see a description of what should be the state of the elements just after loading this page.

| combobox in previos cell should have option '1' selected.
| combobox in previos cell should have no selected option.
| combobox in previos cell should have no selected option.
| combobox in previos cell should handle optgroup correctly.
| combobox in previos cell should handle optgroup correctly.
| after pressing this button all the combo boxes should go back to the state discribed above.