it('should render a a with .boldrui-navbar__link, modifiers and custom classNames', () => {
    const component = shallow(<NavbarLink isActive className="custom" />);
    expect(component.is('a')).toBe(true);
    expect(component.hasClass('boldrui-navbar__link')).toBe(true);
    expect(component.hasClass('is-active')).toBe(true);