Test method inside Vuejs mounted lifecycle hook with Jest

index.spec.js

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

describe('Component', () => {
  describe('mounted', () => {
    let wrapper
    let spy
    beforeEach(() => {
      spy = jest.spyOn(Component.methods, 'methodToMock') 
      wrapper = mount(Component)
    })
    
    afterEach(() => {
      spy.mockClear()
    })
    
    it('should call method methodToMock', () => {
      expect(spy).toHaveBeenCalled()
    })
  })
})