test: add a test to check if arguments prototype is frozen under lock…

…down

packages/ses/test/test-frozen-primordials.js

@@ -2,13 +2,22 @@ import test from 'ava';
 import '../index.js';
 import { getOwnPropertyDescriptor } from '../src/commons.js';
 
-test('check if override-protected primordials are frozen', t => {
+test.before(() => {
  lockdown();
+});
 
+test('check if override-protected primordials are frozen', t => {
  // After removing the detachedProperties mechanism and without
  // the originalValue mechanism, this test failed.
  t.truthy(Object.isFrozen(Object.prototype.toString));
 
  const desc = getOwnPropertyDescriptor(Object.prototype, 'toString');
  t.is(desc.get.originalValue, Object.prototype.toString);
 });
+
+test('check if arguments prototype is frozen', t => {
+ (function gimmeArguments() {
+ // eslint-disable-next-line no-proto
+ t.truthy(Object.isFrozen(arguments.__proto__));
+ })();
+});