The test TestButtonGroupFocusTraversal.java also verifies that ActionEvent is not sent for JToggleButtons and JCheckbox, only for JRadioButtons.

Currently, TestButtonGroupFocusTraversal.java is in problem list for 8u, see JDK-8272105. For this reason, the fix for JDK-8259237 cannot be verified automatically.

I propose extracting the part which verifies whether ActionEvent is raised into a separate test.