axios-mock.js

// src/__mocks_axios.js

const mockAxios = jest.genMockFromModule('axios')

// this is the key to fix the axios.create() undefined error!
mockAxios.create = jest.fn(() => mockAxios)

export default mockAxios

// example test class which uses axios mock

import mockAxios from 'axios'

test('can add Todo to List', async () => {
  mockAxios.get.mockImplementationOnce(() =>
    Promise.resolve({
      data: [],
    }),
  )    
  mockAxios.post.mockImplementationOnce(() =>
    Promise.resolve({
      data: [new Todo('test')],
    }),
  )   
})