File: bindings-inject-keys-bypass-setters.html

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<!doctype html>
<meta charset=utf-8>
<title>IndexedDB: ES bindings - Inject a key into a value - Keys bypass setters</title>
<meta name="help"
href="https://w3c.github.io/IndexedDB/#inject-key-into-value-keys-bypass-setters">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support-promises.js"></script>
<script>

promise_test(async t => {
  const db = await createDatabase(t, db => {
    db.createObjectStore('store');
  });

  let setter_called = false;
  Object.defineProperty(Object.prototype, '10', {
    configurable: true,
    set: value => { setter_called = true; },
  });
  t.add_cleanup(() => { delete Object.prototype['10']; });

  const tx = db.transaction('store', 'readwrite');
  const result = await promiseForRequest(t, tx.objectStore('store').put(
      'value', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 'key']));

  assert_false(setter_called,
               'Setter should not be called for key result.');
  assert_true(result.hasOwnProperty('10'),
              'Result should have own-property overriding prototype setter.');
  assert_equals(result[10], 'key',
                'Result should have expected property.');
}, 'Returning keys to script should bypass prototype setters');

</script>