RFR: 8306424: [testbug] DatePickerUpdateOnAlertCloseTest fails on MacOS

[Karthik P K]

On Thu, 20 Apr 2023 13:28:23 GMT, Karthik P K <kpk at openjdk.org> wrote:

> Test was failing because `CountDownLatch` was not used to make sure that new date is selected and the delay present was not sufficient.
> If the current date is on the left edge of the date picker, this test would fail because of the way new date was selected using mouse click.
> 
> Added `CountDownLatch` to make sure that alert dialog is closed before asserting the date. Updated the test to select new date using robot `keyType` method instead of mouse click so that the test becomes robust.
> 
> Ran the test individually and along with all system tests on Mac. No failure found.

Added mouse based test back and stabilized it. Addressed  other review comments.
Please review.

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PR Comment: https://git.openjdk.org/jfx/pull/1104#issuecomment-1519988127