test: actually test sandbox events in the test that says 'test sandbox events' (#19284)

spec/fixtures/api/sandbox.html

@@ -20,12 +20,12 @@
       opener.require('electron').ipcRenderer.send('answer', document.body.innerHTML)
     }
   } else {
-    const {ipcRenderer, remote} = require('electron')
     const tests = {
       'reload-remote-child': () => {
         open(`${location.protocol}//${location.pathname}?reload-remote`)
       },
       'reload-remote': async () => {
+        const {ipcRenderer, remote} = require('electron')
         const p = ipcRenderer.sendSync('get-remote-module-path')
         const Hello = remote.require(p)
         if (!ipcRenderer.sendSync('reloaded')) {
@@ -35,9 +35,6 @@
         await invokeGc()
         ipcRenderer.send('answer', new Hello().say())
       },
-      'window-events': () => {
-        document.title = 'changed'
-      },
       'webcontents-stop': () => {
         stop()
       },
@@ -50,6 +47,7 @@
         })
       },
       'exit-event': () => {
+        const {ipcRenderer} = require('electron')
         process.on('exit', () => {
           ipcRenderer.send('answer', location.href)
         })
@@ -65,6 +63,7 @@
         })
       },
       'window-open-external': () => {
+        const {ipcRenderer} = require('electron')
         addEventListener('load', () => {
           ipcRenderer.once('open-the-popup', (event, url) => {
             popup = open(url, '', 'top=65,left=55,width=505,height=605')
@@ -82,6 +81,7 @@
         })
       },
       'verify-ipc-sender': () => {
+        const {ipcRenderer} = require('electron')
         popup = open()
         ipcRenderer.once('verified', () => {
           ipcRenderer.send('parent-answer')