The ComboBoxTest.testEditorKeyInputsWhenPopupIsShowing test, which was newly added as part of JDK-8209788, fails on Mac and Linux. It runs fine on Windows.

To reproduce this, run `gradle :controls:test` on Mac or Linux.

Mac:

test.javafx.scene.control.ComboBoxTest > testEditorKeyInputsWhenPopupIsShowing FAILED
    java.lang.AssertionError: expected:<4> but was:<0>
        at org.junit.Assert.fail(Assert.java:91)
        at org.junit.Assert.failNotEquals(Assert.java:645)
        at org.junit.Assert.assertEquals(Assert.java:126)
        at org.junit.Assert.assertEquals(Assert.java:470)
        at org.junit.Assert.assertEquals(Assert.java:454)
        at test.javafx.scene.control.ComboBoxTest.testEditorKeyInputsWhenPopupIsShowing(ComboBoxTest.java:1390)


Linux:

test.javafx.scene.control.ComboBoxTest > testEditorKeyInputsWhenPopupIsShowing FAILED
    java.lang.AssertionError: expected:<4> but was:<3>
        at org.junit.Assert.fail(Assert.java:91)
        at org.junit.Assert.failNotEquals(Assert.java:645)
        at org.junit.Assert.assertEquals(Assert.java:126)
        at org.junit.Assert.assertEquals(Assert.java:470)
        at org.junit.Assert.assertEquals(Assert.java:454)
        at test.javafx.scene.control.ComboBoxTest.testEditorKeyInputsWhenPopupIsShowing(ComboBoxTest.java:1390)

This looks like a test bug, at least in the case of the Mac platform, since Mac uses different key modifiers in some cases. I'm not sure about Linux, but it's likely a test bug, too.

The CTRL-right/left_arrow test fails on both Mac and Linux (this is unsurprising, at least on Mac). Additionally, if those are commented out, the CTRL-home/end and SHIFT-CTRL-home/end tests fail on Mac (this is also unsurprising).

The tests will need to be adjusted, either by skipping them on the failing platforms, or by using a different key modifier on Mac (not sure about Linux).