ant-design-vue/components/breadcrumb/__tests__/Breadcrumb.test.js

import { mount } from '@vue/test-utils'
import Breadcrumb from '../index'

describe('Breadcrumb', () => {
  const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {})

  afterEach(() => {
    errorSpy.mockReset()
  })

  afterAll(() => {
    errorSpy.mockRestore()
  })

  // // https://github.com/airbnb/enzyme/issues/875
  it('warns on non-Breadcrumb.Item children', () => {
    mount(
      {
        render () {
          return (
            <Breadcrumb>
              <div>foo</div>
            </Breadcrumb>
          )
        },
      }
    )
    expect(errorSpy.mock.calls).toHaveLength(1)
    expect(errorSpy.mock.calls[0][0]).toMatch(
      'Breadcrumb only accepts Breadcrumb.Item as it\'s children'
    )
  })

  // https:// github.com/ant-design/ant-design/issues/5015
  it('should allow Breadcrumb.Item is null or undefined', () => {
    const wrapper = mount(
      {
        render () {
          return (
            <Breadcrumb>
              {null}
              <Breadcrumb.Item>Home</Breadcrumb.Item>
              {undefined}
            </Breadcrumb>
          )
        },
      }
    )
    expect(errorSpy).not.toHaveBeenCalled()
    expect(wrapper.html()).toMatchSnapshot()
  })

  // https://github.com/ant-design/ant-design/issues/5542
  it('should not display Breadcrumb Item when its children is falsy', () => {
    const wrapper = mount(
      {
        render () {
          return (
            <Breadcrumb>
              <Breadcrumb.Item />
              <Breadcrumb.Item>xxx</Breadcrumb.Item>
              <Breadcrumb.Item>yyy</Breadcrumb.Item>
            </Breadcrumb>
          )
        },
      }
    )
    expect(wrapper.html()).toMatchSnapshot()
  })
})