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net-stubbing.spec.ts
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net-stubbing.spec.ts
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import { NetworkProxy } from '../../'
import {
netStubbingState as _netStubbingState,
NetStubbingState,
onNetStubbingEvent,
} from '@packages/net-stubbing'
import { defaultMiddleware } from '../../lib/http'
import express from 'express'
import sinon from 'sinon'
import { expect } from 'chai'
import supertest from 'supertest'
import { allowDestroy } from '@packages/network'
import { EventEmitter } from 'events'
import { RemoteStates } from '@packages/server/lib/remote_states'
import { CookieJar } from '@packages/server/lib/util/cookies'
const Request = require('@packages/server/lib/request')
const getFixture = async () => {}
context('network stubbing', () => {
let config
let remoteStates: RemoteStates
let netStubbingState: NetStubbingState
let app
let destinationApp
let server
let destinationPort
let socket
beforeEach((done) => {
config = {}
remoteStates = new RemoteStates(() => {})
socket = new EventEmitter()
socket.toDriver = sinon.stub()
app = express()
netStubbingState = _netStubbingState()
const proxy = new NetworkProxy({
socket,
netStubbingState,
config,
middleware: defaultMiddleware,
getCookieJar: () => new CookieJar(),
remoteStates,
getFileServerToken: () => 'fake-token',
request: new Request(),
getRenderedHTMLOrigins: () => ({}),
serverBus: new EventEmitter(),
requestedWithAndCredentialManager: {
get () {
return {
requestedWith: 'xhr',
credentialStatus: 'same-origin',
}
},
set () {},
clear () {},
},
})
app.use((req, res, next) => {
req.proxiedUrl = req.url = req.url.slice(1)
req.cookies = {}
next()
})
app.use((req, res) => {
proxy.handleHttpRequest(req, res)
})
destinationApp = express()
destinationApp.get('/', (req, res) => res.send('it worked'))
server = allowDestroy(destinationApp.listen(() => {
destinationPort = server.address().port
remoteStates.set(`http://localhost:${destinationPort}`)
done()
}))
})
afterEach(() => {
server.destroy()
})
it('can make a vanilla request', (done) => {
supertest(app)
.get(`/http://localhost:${destinationPort}`)
.expect('it worked', done)
})
it('does not add CORS headers to all responses', () => {
return supertest(app)
.get(`/http://localhost:${destinationPort}`)
.then((res) => {
expect(res.headers).to.not.have.property('access-control-allow-origin')
})
})
it('adds CORS headers to static stubs', () => {
netStubbingState.routes.push({
id: '1',
routeMatcher: {
url: '*',
},
hasInterceptor: false,
staticResponse: {
body: 'foo',
},
getFixture: async () => {},
matches: 1,
})
return supertest(app)
.get(`/http://localhost:${destinationPort}`)
.then((res) => {
expect(res.headers).to.include({
'access-control-allow-origin': '*',
'access-control-allow-credentials': 'true',
})
expect(res.text).to.eq('foo')
})
})
it('does not override CORS headers', () => {
netStubbingState.routes.push({
id: '1',
routeMatcher: {
url: '*',
},
hasInterceptor: false,
staticResponse: {
body: 'foo',
headers: {
'access-control-allow-origin': 'something',
},
},
getFixture: async () => {},
matches: 1,
})
return supertest(app)
.get(`/http://localhost:${destinationPort}`)
.then((res) => {
expect(res.headers).to.include({
'access-control-allow-origin': 'something',
})
})
})
it('uses Origin to set CORS header', () => {
netStubbingState.routes.push({
id: '1',
routeMatcher: {
url: '*',
},
hasInterceptor: false,
staticResponse: {
body: 'foo',
},
getFixture: async () => {},
matches: 1,
})
return supertest(app)
.get(`/http://localhost:${destinationPort}`)
.set('Origin', 'http://foo.com')
.then((res) => {
expect(res.headers).to.include({
'access-control-allow-origin': 'http://foo.com',
})
})
})
it('adds CORS headers to dynamically intercepted requests', () => {
netStubbingState.routes.push({
id: '1',
routeMatcher: {
url: '*',
},
hasInterceptor: true,
getFixture,
matches: 1,
})
socket.toDriver.callsFake((_, event, data) => {
if (event === 'before:request') {
onNetStubbingEvent({
eventName: 'send:static:response',
// @ts-ignore
frame: {
requestId: data.requestId,
staticResponse: {
...data.data,
body: 'replaced',
},
},
state: netStubbingState,
getFixture,
args: [],
socket: {
toDriver () {},
},
})
}
})
return supertest(app)
.get(`/http://localhost:${destinationPort}`)
.then((res) => {
expect(res.text).to.eq('replaced')
expect(res.headers).to.include({
'access-control-allow-origin': '*',
})
})
})
it('does not modify multipart/form-data files', async () => {
const png = Buffer.from('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==', 'base64')
let sendContentLength = ''
let receivedContentLength = ''
let realContentLength = ''
destinationApp.post('/', (req, res) => {
const chunks: Buffer[] = []
req.on('data', (chunk) => {
chunks.push(chunk)
})
req.on('error', (error) => {
throw error
})
req.on('end', () => {
realContentLength = Buffer.byteLength(Buffer.concat(chunks)).toString()
receivedContentLength = req.headers['content-length']
res.send('ok')
})
})
// capture unintercepted content-length
await supertest(app)
.post(`/http://localhost:${destinationPort}`)
.attach('file', png)
netStubbingState.routes.push({
id: '1',
routeMatcher: {
url: '*',
},
hasInterceptor: true,
getFixture,
matches: 1,
})
socket.toDriver.callsFake((_, event, data) => {
if (event === 'before:request') {
sendContentLength = data.data.headers['content-length']
onNetStubbingEvent({
eventName: 'send:static:response',
// @ts-ignore
frame: {
requestId: data.requestId,
staticResponse: {
...data.data,
},
},
state: netStubbingState,
getFixture,
args: [],
socket: {
toDriver () {},
},
})
}
})
// capture content-length after intercepting
await supertest(app)
.post(`/http://localhost:${destinationPort}`)
.attach('file', png)
expect(sendContentLength).to.eq(receivedContentLength)
expect(sendContentLength).to.eq(realContentLength)
})
})