RFR: 8274296: Update or Problem List tests which may fail with uiScale=2 on macOS

[Sergey Bylokhov]

On Fri, 24 Sep 2021 16:28:51 GMT, Phil Race <prr at openjdk.org> wrote:

> As described in https://bugs.openjdk.java.net/browse/JDK-8274106 a number of tests fail due to some inaccuracy in pixels copied from the screen when scaling down from device space to user space.
> The subject of most of these tests is such that uiScale isn't important and we can have them pass with -Dsun.java2d.uiScale=1.
> For the rest we can problem list them - as narrowly as we can on macos-aarch64 which is the only place we've seen the problem (not happening on retina displays with x64 it seems) whilst we try to figure out the root cause which is either in Apple code or something we are doing to trigger that Apple API misbehaviour.

test/jdk/java/awt/Dialog/SiblingChildOrder/SiblingChildOrderTest.java line 29:

> 27:  * @summary [macosx] Order of overlapping of modal dialogs is wrong
> 28:  * @key headful
> 29:  * @run main/othervm -Dsun.java2d.uiScale=1 SiblingChildOrderTest

Switching this tests to scale=1 seems completely wrong. On macos it just tweak the rendering so that bug became invisible due to lost of precision. And now we will run the tests in lowDPI on all other platforms.

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PR: https://git.openjdk.java.net/jdk/pull/5687