Tab tab1 = tabSheet.addTab(new Label("aaa"));
Tab tab2 = tabSheet.addTab(new Label("bbb"));
Tab tab3 = tabSheet.addTab(new Label("ccc"));
Tab tab4 = tabSheet.addTab(new Label("ddd"), "ddd", null, 1);
Tab tab5 = tabSheet.addTab(new Label("eee"), "eee", null, 3);
assertEquals(0, tabSheet.getTabPosition(tab1));
assertEquals(1, tabSheet.getTabPosition(tab4));
assertEquals(2, tabSheet.getTabPosition(tab2));
assertEquals(3, tabSheet.getTabPosition(tab5));