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test: add a test to check if arguments prototype is frozen under lockdown #1252

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Aug 18, 2022
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test: add a test to check if arguments prototype is frozen under lockdown #1252

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11 changes: 10 additions & 1 deletion packages/ses/test/test-frozen-primordials.js
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Original file line number Diff line number Diff line change
Expand Up @@ -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 => {
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(function gimmeArguments() {
// eslint-disable-next-line no-proto
t.truthy(Object.isFrozen(arguments.__proto__));
})();
});