RFR: 8209788: Left/Right/Ctrl+A keys not working in editor of ComboBox if popup showing [v11]

[Ambarish Rapte]

On Wed, 9 Sep 2020 11:59:35 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

>> Ambarish Rapte has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   rename tests
>
> modules/javafx.controls/src/test/java/test/javafx/scene/control/ComboBoxTest.java line 1347:
> 
>> 1345:         final ComboBox<String> cb = new ComboBox<>(FXCollections.observableArrayList("a", "b", "c"));
>> 1346:         cb.setEditable(true);
>> 1347:         StageLoader sl = new StageLoader(cb);
> 
> shouldn't there be an analogous functional test for not-editable combo? There are both functional and low-level for
> editable, but only low-level for not editable.

I did not understand what low-level test mean here. But have added test for navigation keys which verify using
`SelectionModel.getSelectedIndex()`. Please point if it is sufficient.

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PR: https://git.openjdk.java.net/jfx/pull/172