assertEquals(true, objectEditor.listBox.isVisible());
assertEquals(true, objectEditor.newItem.isVisible());
objectEditor.onSelect("obj1", /* Not required. */ false);
objectEditor.onSelect("obj2", /* Not required. */ false);
objectEditor.addNewAdditionalEditor(new ClickEvent() {});
assertEquals(2, objectEditor.editors.size());
assertEquals(1, objectEditor.additionalPropertyEditors.size());
}