chromium/third_party/blink/web_tests/fast/forms/calendar-picker/date-picker-hotkeys.html

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-1000">
<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>
<script src="../resources/common.js"></script>
<script src="../resources/picker-common.js"></script>
<script src="../calendar-picker/resources/calendar-picker-common.js"></script>

<input type="date" id="date-0" value="2019-02-14">
<script>

promise_test(() => {
  let dateElement = document.getElementById('date-0');
  return openPicker(dateElement)
  .then(() => {
    eventSender.keyDown('PageDown');
    assert_equals(dateElement.value, "2019-03-14", "Next month hotkey should have incremented month");

    eventSender.keyDown('PageUp');
    assert_equals(dateElement.value, "2019-02-14", "Previous month hotkey should have decremented month");

    eventSender.keyDown('Home');
    assert_equals(dateElement.value, "2019-02-01", "Home hotkey should go to the first of the month");

    eventSender.keyDown('Home');
    assert_equals(dateElement.value, "2019-01-01", "Home hotkey should go to the first of the previous month");

    eventSender.keyDown('Home');
    assert_equals(dateElement.value, "2018-12-01", "Home hotkey should wrap to previous year");

    eventSender.keyDown('End');
    assert_equals(dateElement.value, "2018-12-31", "End hotkey should go to the end of the month");

    eventSender.keyDown('End');
    assert_equals(dateElement.value, "2019-01-31", "End hotkey hotkey should wrap to next year");

    eventSender.keyDown('End');
    assert_equals(dateElement.value, "2019-02-28", "End hotkey should go to the end of the next month");

    eventSender.keyDown('Enter');
    assert_equals(internals.pagePopupWindow, null, "Enter key should have closed popup.");
  });
}, "Date picker: Previous/next month hotkey (PageDown/PageUp)");

</script>