storage/estimate-parallel.https.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>StorageManager: multiple estimate() calls in parallel</title>
<meta name="help" href="https://storage.spec.whatwg.org/#dom-storagemanager-estimate">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async t => {
  let r1, r2;
  await Promise.all([
    navigator.storage.estimate().then(r => { r1 = r; }),
    navigator.storage.estimate().then(r => { r2 = r; })
  ]);
  assert_true(('usage' in r1) && ('quota' in r1),
              'first response should have expected fields');
  assert_true(('usage' in r2) && ('quota' in r2),
              'second response should have expected fields');
}, 'Multiple estimate() calls in parallel should complete');
</script>