selectlist-tabindex-order.tentative.html

<!DOCTYPE html>
<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>

<input id="input1">
<selectlist id="selectlist" tabindex="2">
  <option>one</option>
  <option>two</option>
  <option>three</option>
</selectlist>
<input id="input3" tabindex="1">

<script>
promise_test(async () => {
  const TAB_KEY = "\uE004";

  const input1 = document.getElementById("input1");
  const input3 = document.getElementById("input3");

  input1.focus();
  assert_equals(document.activeElement.id, "input1", "input1 should be active");

  await test_driver.send_keys(input1, TAB_KEY);
  assert_equals(document.activeElement.id, "input3", "input3 should be active");

  await test_driver.send_keys(input3, TAB_KEY);
  assert_equals(document.activeElement.id, "selectlist", "selectlist should be active");
}, "Check that tabindex applies to <selectlist>");
</script>

chromium/third_party/blink/web_tests/external/wpt/html/semantics/forms/the-selectlist-element/selectlist-tabindex-order.tentative.html