@Test
  public void createCategoryWithNoFields() {
    PropertyEditorWidget propertyEditorWidget = GWT.create(PropertyEditorWidget.class);
    Accordion propertyMenu = GWT.create(Accordion.class);

    PropertyEditorCategory category = new PropertyEditorCategory("1");
    PropertyEditorHelper.createCategory(propertyEditorWidget, propertyMenu, category, "");

    verify(propertyMenu, never()).add(any(Widget.class));
  }