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Upstream lukeed/klona state of the touched files before ba2e73a80c

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upstream committed 2026-09-04 05:12:29 +02:00
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test/suites/tostringtag.js
-42
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import { suite } from 'uvu';
import * as assert from 'assert';
export default function (klona) {
const Spoofed = suite('Symbol.toStringTag spoofing');
// A `Symbol.toStringTag` klona special-cases (eg "Map") used to misroute a
// plain object into that branch and crash.
// @see https://github.com/lukeed/klona/issues/54
Spoofed('recognized tag :: plain object is cloned, not misrouted', () => {
const input = { a: 1, b: { c: 2 }, [Symbol.toStringTag]: 'Map' };
const output = klona(input);
assert.notEqual(output, input, 'must return a new object, not the input');
assert.equal(output.a, 1);
assert.deepEqual(output.b, { c: 2 });
output.a = 999;
output.b.c = 888;
assert.equal(input.a, 1, 'mutating output.a must not affect input');
assert.equal(input.b.c, 2, 'mutating output.b must not affect input');
});
// An unrecognized `Symbol.toStringTag` used to fall through every branch
// and be returned by reference instead of cloned.
// @see https://github.com/lukeed/klona/issues/54
Spoofed('unrecognized tag :: plain object is cloned, not returned by reference', () => {
const input = { a: 1, b: { c: 2 }, [Symbol.toStringTag]: 'Foobar' };
const output = klona(input);
assert.notEqual(output, input, 'must return a new object, not the input');
assert.equal(output.a, 1);
assert.deepEqual(output.b, { c: 2 });
output.a = 999;
output.b.c = 888;
assert.equal(input.a, 1, 'mutating output.a must not affect input');
assert.equal(input.b.c, 2, 'mutating output.b must not affect input');
});
Spoofed.run();
}