content: import React from 'react';
  import { shallow } from 'enzyme';
  import { Nav } from '../';
  
  describe('Nav', () => {
    it('should render .nav markup', () => {
      const wrapper = shallow(<Nav />);
  
      expect(wrapper.html()).toBe('<ul class="nav"></ul>');
    });
  
    it('should render custom tag', () => {
      const wrapper = shallow(<Nav tag="nav" />);
  
      expect(wrapper.html()).toBe('<nav class="nav"></nav>');
    });
  
    it('should render children', () => {
      const wrapper = shallow(<Nav>Children</Nav>);
  
      expect(wrapper.html()).toBe('<ul class="nav">Children</ul>');
    });
  
    it('should handle justified prop', () => {
      const wrapper = shallow(<Nav justified />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-justified"></ul>');
    });
  
    it('should handle fill prop', () => {
      const wrapper = shallow(<Nav fill />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-fill"></ul>');
    });
  
    it('should handle pills prop', () => {
      const wrapper = shallow(<Nav pills />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-pills"></ul>');
    });
  
    it('should handle pills prop with card prop', () => {
      const wrapper = shallow(<Nav pills card />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-pills card-header-pills"></ul>');
    });
  
    it('should handle tabs prop', () => {
      const wrapper = shallow(<Nav tabs />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-tabs"></ul>');
    });
  
    it('should handle tabs prop with card prop', () => {
      const wrapper = shallow(<Nav tabs card />);
  
      expect(wrapper.html()).toBe('<ul class="nav nav-tabs card-header-tabs"></ul>');
    });
  
    it('should handle vertical prop', () => {
      const wrapper = shallow(<Nav vertical />);
  
      expect(wrapper.html()).toBe('<ul class="nav flex-column"></ul>');
    });
  
    it('should handle vertical prop with string', () => {
      const wrapper = shallow(<Nav vertical="sm" />);
  
      expect(wrapper.html()).toBe('<ul class="nav flex-sm-column"></ul>');
    });
  
    it('should handle horizontal prop with string', () => {
      const wrapper = shallow(<Nav horizontal="end" />);
  
      expect(wrapper.html()).toBe('<ul class="nav justify-content-end"></ul>');
    });
  
    it('should pass additional classNames', () => {
      const wrapper = shallow(<Nav className="extra" />);
  
      expect(wrapper.hasClass('extra')).toBe(true);
      expect(wrapper.hasClass('nav')).toBe(true);
    });
  
    it('should render .navbar-nav class only', () => {
      const wrapper = shallow(<Nav navbar>Children</Nav>);
  
      expect(wrapper.html()).toBe('<ul class="navbar-nav">Children</ul>');
    });
  });
  