element-plus/packages/button/__tests__/button.spec.ts

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

const AXIOM = 'Rem is the best girl'
const COMMON_CONFIG = {
  global: {
    provide: {
      elForm: {},
      elFormItem: {},
    }
  }
}

describe('Button.vue', () => {
  test('render text', () => {
    const instance = mount(Button, {
      slots: {
        default: AXIOM
      },
      ...COMMON_CONFIG,
    })
    expect(instance.text()).toEqual(AXIOM)
  })

  test('handle click', async () => {
    const instance = mount(Button, {
      slots: {
        default: AXIOM
      },
      ...COMMON_CONFIG,
    })
    await instance.trigger('click')
    expect(instance.emitted()).toBeDefined()

  })
})