RFR: 8280951: Testbug: fix commented asserts in XXViewTest.test_rt_29650

[Kevin Rushforth]

On Thu, 3 Feb 2022 11:38:55 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

> the issue was commented asserts in a test methods - they had been failing due to incorrect usage of registering an edit commit handler
> 
> fix was to correct the registration and uncomment the assert (ListViewTest). For Tree/TableViewTest, had to adjust value access also (was: c&p from ListViewTest). Verified that the uncommented (corrected) asserts are failing/passing before/after fix of test bug

LGTM

-------------

Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.java.net/jfx/pull/725