listbox-wheel-event.html | Explore in Territory

<!DOCTYPE html>
<script src='../../resources/testharness.js'></script>
<script src='../../resources/testharnessreport.js'></script>
<script src='../../resources/gesture-util.js'></script>

<style>
  #sel {
    width: 500px;
    height: 300px;
  }
</style>

<select multiple id='sel'></select>

<script>
  const MOUSE_INPUT = GestureSourceType.MOUSE_INPUT;

  internals.settings.setScrollAnimatorEnabled(false);
  let sel = document.getElementById('sel');
  for (let i = 0; i < 50; i++) {
    let option = document.createElement('option');
    option.innerHTML = 'Option ' + i;
    sel.appendChild(option);
  }

  window.onload = async () => {
    await waitForCompositorCommit();

    promise_test(async () => {
      await smoothScroll(100, 100, 100, MOUSE_INPUT, 'down', 1000);
      await waitFor(() => { return sel.scrollTop > 0; });
    }, 'Ensure <select> scrollable');
  }
</script>

chromium/third_party/blink/web_tests/fast/scrolling/listbox-wheel-event.html