zoro-cli/lib/plugins/config-web/template/tests/unit/M.spec.js

https://github.com/vuejs/vue-cli

import { mount } from '@vue/test-utils'
import M from 'src/module/common/M'

describe('M', () => {
  test('is a Vue instance', () => {
    const wrapper = mount(M)
    expect(wrapper.isVueInstance()).toBeTruthy()
  })
})