invokeaction-showpicker-select.html

<!DOCTYPE html>
<link rel="help" href="https://open-ui.org/components/invokers.explainer/">
<link rel="author" title="Luke Warlow" href="mailto:[email protected]">
<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>
<body>
<select id="invokee">
  <option>1</option>
</select>
<button id="invokerbutton" commandfor="invokee" command="showpicker"></button>
</body>
<script>
promise_test(async (t) => {
  await test_driver.click(invokerbutton);
  await new Promise(resolve => {
    requestAnimationFrame(resolve);
  });
  assert_true(internals.isSelectPopupVisible(invokee), "Picker is opened.");
  invokee.remove();
}, `invoking select with showPicker action should show picker`)
</script>

chromium/third_party/blink/web_tests/fast/html/semantics/invokers/invokeaction-showpicker-select.html