probot/test/webhook-proxy.test.ts

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import express, { Response } from 'express'
// tslint:disable-next-line:no-var-requires
const sse: (req: express.Request, res: express.Response, next: express.NextFunction) => void = require('connect-sse')()
import EventSource from 'eventsource'
import http from 'http'
import net from 'net'
import nock from 'nock'
import { logger } from '../src/logger'
import { createWebhookProxy } from '../src/webhook-proxy'
const targetPort = 999999
interface SSEResponse extends Response {
json (body: any, status?: string): Response
}
describe('webhook-proxy', () => {
// tslint:disable-next-line:one-variable-per-declaration
let emit: SSEResponse['json'],
proxy: EventSource,
server: http.Server
afterEach(() => {
server && server.close()
proxy && proxy.close()
})
describe('with a valid proxy server', () => {
beforeEach((done) => {
const app = express()
app.get('/events', sse, (req, res: SSEResponse) => {
res.json({}, 'ready')
emit = res.json
})
server = app.listen(0, () => {
const url = `http://127.0.0.1:${(server.address() as net.AddressInfo).port}/events`
proxy = createWebhookProxy({ url, port: targetPort, path: '/test', logger })!
// Wait for proxy to be ready
proxy.addEventListener('ready', () => done())
})
})
test('forwards events to server', (done) => {
nock(`http://localhost:${targetPort}`).post('/test').reply(200, () => {
done()
})
const body = { action: 'foo' }
emit({
body,
'x-github-event': 'test'
})
})
})
test('logs an error when the proxy server is not found', (done) => {
const url = 'http://bad.proxy/events'
nock('http://bad.proxy').get('/events').reply(404)
const log = logger.child({})
log.error = jest.fn()
proxy = createWebhookProxy({ url, logger: log })!
proxy.addEventListener('error', (err: any) => {
expect(err.status).toBe(404)
expect(log.error).toHaveBeenCalledWith(err)
done()
})
})
})