input-date-time-default-action.html

<!DOCTYPE HTML>
<script src="../resources/gc.js"></script>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>

<input id="dateInput" type="date">
<input id="timeInput" type="time">

<script>
test(function(t) {
  const axInputElement =
      accessibilityController.accessibleElementById("dateInput");
  const axButton = axInputElement.childAtIndex(0).childAtIndex(1);
  assert_true(axButton.hasDefaultAction());

}, "Test there is a default action for the button in input type=date");

test(function(t) {
  const axInputElement =
      accessibilityController.accessibleElementById("timeInput");
  const axButton = axInputElement.childAtIndex(0).childAtIndex(1);
  assert_true(axButton.hasDefaultAction());

}, "Test there is a default action for the button in input type=time");
</script>

chromium/third_party/blink/web_tests/accessibility/input-date-time-default-action.html