randomize test server port

Author: ephetic

src/content-scripts/__tests__/attributes.spec.js

@@ -4,6 +4,7 @@ import {launchPuppeteerWithExtension, runDist} from '../../__e2e-tests__/helpers
 import { waitForAndGetEvents, cleanEventLog, startServer } from './helpers'
 
 let server
+let port
 let browser
 let page
 
@@ -12,7 +13,11 @@ describe.only('attributes', () => {
     await runDist()
     const buildDir = process.env.NODE_ENV === 'production' ? '../../../dist' : '../../../build'
     const fixture = './fixtures/attributes.html'
-    server = await startServer(buildDir, fixture)
+    {
+      const {server: _s, port: _p} = await startServer(buildDir, fixture)
+      server = _s
+      port = _p
+    }
     return done()
   }, 20000)
 
@@ -25,7 +30,7 @@ describe.only('attributes', () => {
   beforeEach(async () => {
     browser = await launchPuppeteerWithExtension(puppeteer)
     page = await browser.newPage()
-    await page.goto('http://localhost:3000/')
+    await page.goto(`http://localhost:${port}/`)
     await cleanEventLog(page)
   })
 

src/content-scripts/__tests__/forms.spec.js

@@ -4,6 +4,7 @@ import {launchPuppeteerWithExtension, runDist} from '../../__e2e-tests__/helpers
 import { waitForAndGetEvents, cleanEventLog, startServer } from './helpers'
 
 let server
+let port
 let browser
 let page
 
@@ -12,7 +13,11 @@ describe('forms', () => {
     await runDist()
     const buildDir = process.env.NODE_ENV === 'production' ? '../../../dist' : '../../../build'
     const fixture = './fixtures/forms.html'
-    server = await startServer(buildDir, fixture)
+    {
+      const {server: _s, port: _p} = await startServer(buildDir, fixture)
+      server = _s
+      port = _p
+    }
     return done()
   }, 20000)
 
@@ -25,7 +30,7 @@ describe('forms', () => {
   beforeEach(async () => {
     browser = await launchPuppeteerWithExtension(puppeteer)
     page = await browser.newPage()
-    await page.goto('http://localhost:3000/')
+    await page.goto(`http://localhost:${port}/`)
     await cleanEventLog(page)
   })
 

src/content-scripts/__tests__/helpers.js

@@ -25,8 +25,21 @@ export const startServer = function (buildDir, file) {
     app.get('/', (req, res) => {
       res.status(200).sendFile(file, { root: __dirname })
     })
-    const server = app.listen(3000, () => {
-      return resolve(server)
-    })
+    let server
+    let port
+    const retry = (e) => {
+      if(e.code == 'EADDRINUSE') {
+        setTimeout(() => connect, 1000)
+      }
+    }
+    const connect = () => {
+      port = 0|(Math.random() * 1000) + 3000
+      server = app.listen(port)
+      server.once('error', retry)
+      server.once('listening', () => {
+        return resolve({server, port})
+      })
+    }
+    connect()
   })
 }