Index: src/test/api/java/common/javax/swing/plaf/basic/BasicTableHeaderUITest.java =================================================================== --- src/test/api/java/common/javax/swing/plaf/basic/BasicTableHeaderUITest.java (revision 494856) +++ src/test/api/java/common/javax/swing/plaf/basic/BasicTableHeaderUITest.java (working copy) @@ -150,4 +150,9 @@ assertEquals(new Dimension(70, renderingComponent.getPreferredSize().height), ui .getPreferredSize(null)); } + + public void testMouseInputListener() throws Exception { + // Regression test for HARMONY-1777 + new BasicTableHeaderUI().new MouseInputHandler().mouseEntered(null); + } }