TestColumnWrapLayout#testHorizontalMargins and #testVerticalMargins fail on Windows

[HeikoKlare]

The test cases TestColumnWrapLayout#testHorizontalMargins and TestColumnWrapLayout#testVerticalMargins seem to be failing since 17th October 2025.

First failing run seems to be this: https://github.com/eclipse-platform/eclipse.platform.ui/runs/52992703271

With all subsequent runs for different PRs and master builds also failing, e.g.:

• https://github.com/eclipse-platform/eclipse.platform.ui/runs/52994474663
• https://github.com/eclipse-platform/eclipse.platform.ui/runs/53000787037
• https://github.com/eclipse-platform/eclipse.platform.ui/pull/3404/checks?check_run_id=53021730945

expected:<Rectangle {0, 0, 150, 40}> but was:<Rectangle {178, 178, 150, 40}>
java.lang.AssertionError: expected:<Rectangle {0, 0, 150, 40}> but was:<Rectangle {178, 178, 150, 40}>
	at org.junit.Assert.fail(Assert.java:89)
	at org.junit.Assert.failNotEquals(Assert.java:835)
	at org.junit.Assert.assertEquals(Assert.java:120)
	at org.junit.Assert.assertEquals(Assert.java:146)
	at org.eclipse.ui.tests.forms.layout.TestColumnWrapLayout.testHorizontalMargins(TestColumnWrapLayout.java:156)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)

Probably caused by SWT change:

• [Windows] Place new windows near top-left corner of their parents #2608 eclipse.platform.swt#2636

Which was already fixed via:

• [Win32] Fix initial control location #2643 eclipse.platform.swt#2644

So failures should hopefully disappear again tomorrow.

[HeikoKlare]

Assumption for the cause seems to be correct. Tests succeed again today, see, e.g., these recent runs:

• https://github.com/eclipse-platform/eclipse.platform.ui/actions/runs/18596203704/job/53074160982
• https://github.com/eclipse-platform/eclipse.platform.ui/actions/runs/18613481662/job/53074874493