test: more logging in node inspector test (#23746)

spec-main/node-spec.ts

@@ -258,10 +258,13 @@ describe('node feature', () => {
       const success = false;
       function listener (data: Buffer) {
         output += data;
-        console.log(data); // NOTE: temporary debug logging to try to catch flake.
+        console.log(data.toString()); // NOTE: temporary debug logging to try to catch flake.
         const match = /^Debugger listening on (ws:\/\/.+:\d+\/.+)\n/m.exec(output.trim());
         if (match) {
           cleanup();
+          // NOTE: temporary debug logging to try to catch flake.
+          child.stderr.on('data', (m) => console.log(m.toString()));
+          child.stdout.on('data', (m) => console.log(m.toString()));
           const w = (webContents as any).create({}) as WebContents;
           w.loadURL('about:blank')
             .then(() => w.executeJavaScript(`new Promise(resolve => {

spec/fixtures/module/delay-exit.js

@@ -1,3 +1,6 @@
 const { app } = require('electron');
 
-process.on('message', () => app.quit());
+process.on('message', () => {
+  console.log('Notified to quit');
+  app.quit();
+});