select-pseudo-open.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/forms/the-select-element/customizable-select/select-pseudo-open.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

<link rel=help href="https://github.com/openui/open-ui/issues/547">

<link rel=help href="https://drafts.csswg.org/selectors/#open-state">

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

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

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

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

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

<select id=myselect>

  <option>one</option>

  <option>two</option>

</select>

<style>

  select, ::picker(select) {

    appearance: base-select;

</style>

<script>

promise_test(async () => {

  assert_true(CSS.supports('appearance', 'base-select'),

    'This test requires appearance:base-select in order to run.');

  assert_false(myselect.matches(':open'),

    'select should not match :open while it is closed.');

  await test_driver.click(myselect);

  assert_true(myselect.matches(':open'),

    'select should match :open while it is open.');

}, 'select should support :open pseudo selector.');

</script>

<select id=selectinvalidation>

  <option>one</option>

  <option>two</option>

</select>

<style>

select:not(:open) {

  background-color: red;

select:open {

  background-color: green;

</style>

<script>

promise_test(async () => {

  assert_true(CSS.supports('appearance', 'base-select'),

    'This test requires appearance:base-select in order to run.');

  const select = document.getElementById('selectinvalidation');

  const option = select.querySelector('option');

  assert_equals(getComputedStyle(select).backgroundColor, 'rgb(255, 0, 0)',

    'The style rules from :not(:open) should apply when the select is closed.');

  await test_driver.click(select);

  assert_equals(getComputedStyle(select).backgroundColor, 'rgb(0, 128, 0)',

    'The style rules from :open should apply when the select is open.');

  await test_driver.click(select);

  assert_equals(getComputedStyle(select).backgroundColor, 'rgb(255, 0, 0)',

    'The style rules from :not(:open) should apply when the select is opened and closed again.');

}, 'select :open and :not(:open) should invalidate correctly.');

</script>