assertEquals(2, tabSheet.getTabPosition(tab2));
assertEquals(3, tabSheet.getTabPosition(tab5));
assertEquals(4, tabSheet.getTabPosition(tab3));
// Calling addTab with existing component does not move tab
tabSheet.addTab(tab1.getComponent(), 3);
assertEquals(0, tabSheet.getTabPosition(tab1));
assertEquals(1, tabSheet.getTabPosition(tab4));
assertEquals(2, tabSheet.getTabPosition(tab2));
assertEquals(3, tabSheet.getTabPosition(tab5));