esm: process proxy Symbol.toString fix

PR-URL: #25963
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

lib/internal/bootstrap/node.js

@@ -347,6 +347,12 @@ function setupProcessObject() {
  const origProcProto = Object.getPrototypeOf(process);
  Object.setPrototypeOf(origProcProto, EventEmitter.prototype);
  EventEmitter.call(process);
+ Object.defineProperty(process, Symbol.toStringTag, {
+ enumerable: false,
+ writable: false,
+ configurable: false,
+ value: 'process'
+ });
  // Make process globally available to users by putting it on the global proxy
  global.process = process;
 }

test/es-module/test-esm-process.mjs

@@ -0,0 +1,6 @@
+// Flags: --experimental-modules
+import '../common';
+import assert from 'assert';
+import process from 'process';
+
+assert.strictEqual(Object.prototype.toString.call(process), '[object process]');