Failing test for #4620

test/integration/app-aspath/pages/_app.js

@@ -0,0 +1,16 @@
+import React from 'react'
+import App, {Container} from 'next/app'
+
+export default class MyApp extends App {
+  // find this
+
+  static async getInitialProps ({ ctx }) {
+    const { query, pathname, asPath } = ctx
+    return {url: {query, pathname, asPath}}
+  }
+
+  render () {
+    const {Component, url} = this.props
+    return <Container><Component url={url} /></Container>
+  }
+}

test/integration/app-aspath/pages/index.js

@@ -0,0 +1 @@
+export default props => JSON.stringify(props, null, 2)

test/integration/app-aspath/test/index.test.js

@@ -0,0 +1,55 @@
+/* global jasmine, describe, it, expect, beforeAll, afterAll */
+
+import webdriver from 'next-webdriver'
+import { readFileSync, writeFileSync } from 'fs'
+import { join } from 'path'
+import {
+  renderViaHTTP,
+  findPort,
+  launchApp,
+  killApp,
+  waitFor
+} from 'next-test-utils'
+
+let appPort
+let server
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000 * 60 * 5
+
+describe('App asPath', () => {
+  beforeAll(async () => {
+    appPort = await findPort()
+    server = await launchApp(join(__dirname, '../'), appPort, true)
+
+    // pre-build all pages at the start
+    await Promise.all([
+      renderViaHTTP(appPort, '/')
+    ])
+  })
+  afterAll(() => killApp(server))
+
+  it('should not have any changes in asPath after a bundle rebuild', async () => {
+    const browser = await webdriver(appPort, '/')
+    const appPath = join(__dirname, '../', 'pages', '_app.js')
+    const originalContent = readFileSync(appPath, 'utf8')
+
+    try {
+      const text = await browser.elementByCss('body').text()
+      expect(text).toBe('{ "url": { "query": {}, "pathname": "/", "asPath": "/" } }')
+
+      const editedContent = originalContent.replace('find this', 'replace with this')
+
+      // Change the content to trigger a bundle rebuild
+      await writeFileSync(appPath, editedContent, 'utf8')
+
+      // Wait for the bundle rebuild
+      await waitFor(5000)
+
+      const newContent = await browser.elementByCss('body').text()
+      expect(newContent).toBe('{ "url": { "query": {}, "pathname": "/", "asPath": "/" } }')
+    } finally {
+      // Change back to the original content
+      writeFileSync(appPath, originalContent, 'utf8')
+      browser.close()
+    }
+  })
+})