我有一个组件，当我用测试覆盖它时-覆盖率不是100%，因为默认属性函数没有覆盖

Favorites.defaultProps = {
  toggleFavorite: () => {} - is NOT COVERED
};

字符串
我不知道如何测试默认的prop函数，因为我已经测试了click事件，并且已经调用了toggleFavorite（）函数。请参阅第一个测试handles toggle favorite。因此在这个测试中，我调用了该函数。
请告诉我我做错了什么，为什么覆盖率不是100%。
我的组件：

export const Favorites = ({ id, metadata, toggleFavorite, isFavorite }) => {
      const [isFavorites, setIsFavorites] = React.useState(isFavorite);

      useEffect(() => {
        setIsFavorites(isFavorite);
      }, [isFavorite]);

      const toggleFavoriteStatus = () => {
        setIsFavorites(!isFavorites);
        const { cmosCatalogId, cmosItem } = metadata;

        toggleFavorite({ id, cmosCatalogId, cmosItem }, isFavorites);
      };

      return (
        <Container>
          <FavButton
            aria-label={isFavorites ? 'Remove from favorites' : 'Add to favorites'}
            onClick={toggleFavoriteStatus}
            data-testid="favorite-button"
          >
            <FavImage
              className="fav-btn-img"
              style={{ opacity: isFavorites ? 1 : 0.3 }}
              src={isFavorites ? selectedFavIcon : favOverIcon}
              alt={favOverIcon}
            />
          </FavButton>
        </Container>
      );
    };

    Favorites.propTypes = {
      id: PropTypes.string,
      metadata: PropTypes.object,
      isFavorite: PropTypes.any,
      toggleFavorite: PropTypes.func,
    };

    Favorites.defaultProps = {
      id: '',
      metadata: {},
      isFavorite: false,
      toggleFavorite: () => {},
    };

型
测试：

describe('Favorites component', () => {
  it('handles toggle favorite', () => {
    const props = getProps();
    const { container } = render(<Favorites {...props} />);

    const { cmosCatalogId, cmosItem } = props.metadata;
    const { id } = props;

    fireEvent.click(queryByTestId(container, 'favorite-button'));
    expect(props.toggleFavorite).toHaveBeenCalled();
    expect(props.toggleFavorite).toHaveBeenCalledWith({ id, cmosCatalogId, cmosItem }, props.isFavorite);
  });

  it('should have aria-label equals to Add to favorites if isFavorite is false', () => {
    const props = getProps({
      isFavorite: false,
    });

    const { container } = render(<Favorites {...props} />);

    expect(queryByTestId(container, 'favorite-button').getAttribute('aria-label')).toBe('Add to favorites');
  });

  it('should have aria-label equals to Remove from favorites if isFavorite is true', () => {
    const props = getProps({
      isFavorite: true,
    });

    const { container } = render(<Favorites {...props} />);

    expect(queryByTestId(container, 'favorite-button').getAttribute('aria-label')).toBe('Remove from favorites');
  });
});

型