write unit test jest first before json function

1const axios = require('axios');
2const Users = require('./users');
3
4jest.mock('axios');
5
6test('should fetch users', () => {
7
8    const users = [{
9        "id": 1,
10        "first_name": "Robert",
11        "last_name": "Schwartz",
12        "email": "rob23@gmail.com"
13    }, {
14        "id": 2,
15        "first_name": "Lucy",
16        "last_name": "Ballmer",
17        "email": "lucyb56@gmail.com"
18    }];
19
20    const resp = { data : users };
21
22    axios.get.mockImplementation(() => Promise.resolve(resp));
23
24    Users.all().then(resp => expect(resp.data).toEqual(users));
25});
26