storage-access-api/resources/permissions-iframe.https.html

<!doctype html>
<meta charset=utf-8>

<script src="/resources/testharness.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<!-- no testharnessreport.js -->
<script src="../helpers.js"></script>
<div id=log></div>
<script>
"use strict";

test_driver.set_test_context(window.top);

promise_test(async t => {
  const permission = await navigator.permissions.query({name: "storage-access"});
  assert_equals(permission.name, "storage-access");
  assert_equals(permission.state, "prompt");
}, "Permission default state can be queried");

promise_test(async t => {
  t.add_cleanup(async () => {
    await test_driver.set_permission({ name: 'storage-access' }, 'prompt');
  });
  await test_driver.set_permission({ name: 'storage-access' }, 'granted');

  const permission = await navigator.permissions.query({name: "storage-access"});
  assert_equals(permission.name, "storage-access");
  assert_equals(permission.state, "granted");
}, "Permission granted state can be queried");

promise_test(async t => {
  t.add_cleanup(async () => {
    await test_driver.set_permission({ name: 'storage-access' }, 'prompt');
  });
  await test_driver.set_permission({ name: 'storage-access' }, 'denied');

  const permission = await navigator.permissions.query({name: "storage-access"});
  assert_equals(permission.name, "storage-access");
  assert_equals(permission.state, "prompt");

  await test_driver.set_permission({ name: 'storage-access' }, 'prompt');
}, "Permission denied state is hidden");

promise_test(async t => {
  t.add_cleanup(async () => {
    await test_driver.set_permission({ name: 'storage-access' }, 'prompt');
  });

  const permission = await navigator.permissions.query({name: "storage-access"});

  const p = new Promise(resolve => {
    permission.addEventListener("change", (event) => resolve(event), { once: true });
  });

  await test_driver.set_permission({ name: 'storage-access' }, 'granted');
  await document.requestStorageAccess();

  const event = await p;

  assert_equals(event.target.name, "storage-access");
  assert_equals(event.target.state, "granted");
}, "Permission state can be observed");

</script>