write unit test jest first before json function
const axios = require('axios');
const Users = require('./users');
jest.mock('axios');
test('should fetch users', () => {
const users = [{
"id": 1,
"first_name": "Robert",
"last_name": "Schwartz",
"email": "[email protected]"
}, {
"id": 2,
"first_name": "Lucy",
"last_name": "Ballmer",
"email": "[email protected]"
}];
const resp = { data : users };
axios.get.mockImplementation(() => Promise.resolve(resp));
Users.all().then(resp => expect(resp.data).toEqual(users));
});