create-test-server/src/index.js

Creates a minimal Express server for testing

'use strict';

const http = require('http');
const https = require('https');
const express = require('express');
const pify = require('pify');
const createCert = require('create-cert');
const bodyParser = require('body-parser');

const createTestServer = (opts = {}) => createCert(opts.certificate)
	.then(keys => {
		const server = express();
		server.http = http.createServer(server);
		server.https = https.createServer(keys, server);
		server.caCert = keys.caCert;

		server.set('etag', false);

		if (opts.bodyParser !== false) {
			server.use(bodyParser.json(Object.assign({ limit: '1mb', type: 'application/json' }, opts.bodyParser)));
			server.use(bodyParser.text(Object.assign({ limit: '1mb', type: 'text/plain' }, opts.bodyParser)));
			server.use(bodyParser.urlencoded(Object.assign({ limit: '1mb', type: 'application/x-www-form-urlencoded', extended: true }, opts.bodyParser)));
			server.use(bodyParser.raw(Object.assign({ limit: '1mb', type: 'application/octet-stream' }, opts.bodyParser)));
		}

		const send = fn => (req, res, next) => {
			const cb = typeof fn === 'function' ? fn(req, res, next) : fn;

			Promise.resolve(cb).then(val => {
				if (val) {
					res.send(val);
				}
			});
		};

		const get = server.get.bind(server);
		server.get = function () {
			const [path, ...handlers] = [...arguments];

			for (const handler of handlers) {
				get(path, send(handler));
			}
		};

		server.listen = () => Promise.all([
			pify(server.http.listen.bind(server.http))().then(() => {
				server.port = server.http.address().port;
				server.url = `http://localhost:${server.port}`;
			}),
			pify(server.https.listen.bind(server.https))().then(() => {
				server.sslPort = server.https.address().port;
				server.sslUrl = `https://localhost:${server.sslPort}`;
			})
		]);

		server.close = () => Promise.all([
			pify(server.http.close.bind(server.http))().then(() => {
				server.port = undefined;
				server.url = undefined;
			}),
			pify(server.https.close.bind(server.https))().then(() => {
				server.sslPort = undefined;
				server.sslUrl = undefined;
			})
		]);

		return server.listen().then(() => server);
	});

module.exports = createTestServer;