splitPane.showSplit();
splitPane.saveDividerLocation();
assertEquals(splitPane.getDividerFraction(), SplittablePane.DEFAULT_DIVIDER_LOCATION, 0.1);
splitPane.setDividerFraction(0.4);
splitPane.saveDividerLocation();
assertEquals(splitPane.getDividerFraction(), 0.3, 0.1);
splitPane.hideSplit();
splitPane.saveDividerLocation();
assertEquals(splitPane.getDividerFraction(), 0.3, 0.1);