RFR: 8366844: Update and automate MouseDraggedOriginatedByScrollBarTest.java [v6]

[Alexey Ivanov]

On Fri, 5 Sep 2025 18:45:59 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

>> When testing jtreg manual tests, some tests were out of date. This PR is an attempt at updating the test and automating it. 
>> 
>> `MouseDraggedOriginatedByScrollBarTest.java` works as expected when compared to native apps and outputs drag events even when the mouse pointer is dragged off of the scrollbar and window altogether. Events should still fire, but the previous instructions may make this confusing since it reads as if no events should be output to the textarea at all.
>
> Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update with final var and loop increment

Changes requested by aivanov (Reviewer).

test/jdk/java/awt/List/MouseDraggedOriginatedByScrollBarTest.java line 47:

> 45:     private static Frame frame;
> 46:     private static volatile Point loc;
> 47:     private static volatile List list;

Suggestion:

    private static List list;

There's no reason for `list` to be volatile.

test/jdk/java/awt/List/MouseDraggedOriginatedByScrollBarTest.java line 53:

> 51:     public static void main(String[] args) throws Exception {
> 52:         try {
> 53:             createUI();

Should `createUI` be called on EDT?

test/jdk/java/awt/List/MouseDraggedOriginatedByScrollBarTest.java line 85:

> 83:                 @Override
> 84:                 public void mouseDragged(MouseEvent me){
> 85:                     System.out.println(me.toString());

Suggestion:

                    System.out.println(me);

`.toString()` is redundant for `println`.

test/jdk/java/awt/List/MouseDraggedOriginatedByScrollBarTest.java line 93:

> 91:             new MouseAdapter() {
> 92:                 public void mousePressed(MouseEvent me) {
> 93:                     System.out.println(me.toString());

Suggestion:

                    System.out.println(me);

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

PR Review: https://git.openjdk.org/jdk/pull/26636#pullrequestreview-3196160889
PR Review Comment: https://git.openjdk.org/jdk/pull/26636#discussion_r2330001941
PR Review Comment: https://git.openjdk.org/jdk/pull/26636#discussion_r2330000948
PR Review Comment: https://git.openjdk.org/jdk/pull/26636#discussion_r2329996596
PR Review Comment: https://git.openjdk.org/jdk/pull/26636#discussion_r2329998506