dialog-close-via-attribute.tentative.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/interactive-elements/the-dialog-element/dialog-close-via-attribute.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<link rel=author href="mailto:jarhar@chromium.org">

<link rel=help href="https://github.com/whatwg/html/issues/5802">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<button>button</button>

<dialog>hello world</dialog>

<script>

const dialog = document.querySelector('dialog');

const button = document.querySelector('button');

promise_test(async t => {

  dialog.showModal();

  let closeFired = false;

  let cancelFired = false;

  dialog.addEventListener('close', () => closeFired = true);

  dialog.addEventListener('cancel', () => cancelFired = true);

  dialog.removeAttribute('open');

  await new Promise(resolve => t.step_timeout(resolve, 0));

  await new Promise(requestAnimationFrame);

  assert_false(dialog.matches(':modal'),

    'The dialog should not match :modal after closing.');

  assert_false(cancelFired,

    'The cancel event should not fire when removing the open attribute.');

  assert_true(closeFired,

    'The close event should be fired when removing the open attribute.');

  let buttonFiredClick = false;

  button.addEventListener('click', () => buttonFiredClick = true);

  await test_driver.click(button);

  assert_true(buttonFiredClick,

    'The page should not be inert or blocked after removing the open attribute.');

}, 'Removing the open attribute from an open modal dialog should run the closing algorithm.');

promise_test(async t => {

  dialog.show();

  let closeFired = false;

  let cancelFired = false;

  dialog.addEventListener('close', () => closeFired = true);

  dialog.addEventListener('cancel', () => cancelFired = true);

  dialog.removeAttribute('open');

  await new Promise(resolve => t.step_timeout(resolve, 0));

  await new Promise(requestAnimationFrame);

  assert_false(cancelFired,

    'The cancel event should not fire when removing the open attribute.');

  assert_true(closeFired,

    'The close event should be fired when removing the open attribute.');

}, 'Removing the open attribute from an open non-modal dialog should fire a close event.');

</script>