Small Node.js http.request emulator

I use it in unit tests.

describe('HttpFake', () => {

const HttpFake = require('../src/HttpFake'),
options = {
hostname: 'localhost',
port: 80,
path: '/api/users/login',
body: {
login: 'jack',
password: 'P@ssw0rd'
},
method: 'POST',
headers: {
'Content-Type': 'application/json'
}
},
response = {
statusCode: 200,
body: {
token: 'value is here'
},
headers: {
'Content-Type': 'application/json'
}
};
let http = null;

beforeEach(() => {
http = new HttpFake();
});

it('should pass', () => {

http.expect(options);
http.returns(response);

const clientRequest = http.request(options, (res) => {

expect(res.headers).toEqual(response.headers);
expect(res.statusCode).toEqual(response.statusCode);

res.on('data', (chunk) => {

const body = JSON.parse(chunk);
expect(body).toEqual(response.body);
});
});

const content = JSON.stringify(options.body);
clientRequest.write(content);
clientRequest.end();
});
});