Index: modules/swing/src/test/api/java/common/javax/swing/plaf/basic/BasicOptionPaneUI_ButtonAreaLayoutTest.java =================================================================== --- modules/swing/src/test/api/java/common/javax/swing/plaf/basic/BasicOptionPaneUI_ButtonAreaLayoutTest.java (revision 490473) +++ modules/swing/src/test/api/java/common/javax/swing/plaf/basic/BasicOptionPaneUI_ButtonAreaLayoutTest.java (working copy) @@ -320,6 +320,12 @@ .preferredLayoutSize(container)); } + // Regression for HARMONY-2900 + public void testPreferedLayoutSize() { + assertEquals(new Dimension(), layout.preferredLayoutSize(null)); + // no exception expected + } + public void testRemoveLayoutComponent() { Container container = new JPanel(); JComponent component1 = new JPanel();