Axios Mocking with Typescript

users.test.ts

// users.test.ts
import axios from 'axios';
import Users from '../src/users';

jest.mock('axios');
const mockedAxios = axios as jest.Mocked<typeof axios>;

let us: Users;
beforeAll(() => {
  us = new Users();
});

test('should fetch users', () => {
  const users = [{ name: 'Bob' }];
  const resp = { data: users };

  mockedAxios.get.mockResolvedValue(resp);

  // or you could use the following depending on your use case:
  // axios.get.mockImplementation(() => Promise.resolve(resp))

  return us.all().then(data => expect(data).toEqual(users));
});

users.ts

// users.ts
import axios from 'axios';

export class Users {
  constructor() {}
  all() {
    return axios.get('/users.json').then(resp => resp.data);
  }
}

export default Users;