function waitForRender() {
  return new Promise(resolve => requestAnimationFrame(() => requestAnimationFrame(resolve)));
}
async function clickOn(element) {
  await waitForRender();
  let rect = element.getBoundingClientRect();
  let actions = new test_driver.Actions();
  // FIXME: Switch to pointerMove(0, 0, {origin: element}) once
  // https://github.com/web-platform-tests/wpt/issues/41257 is fixed.
  await actions
      .pointerMove(Math.round(rect.x + rect.width / 2), Math.round(rect.y + rect.height / 2), {})
      .pointerDown({button: actions.ButtonType.LEFT})
      .pointerUp({button: actions.ButtonType.LEFT})
      .send();
  await waitForRender();
}
async function hoverOver(element) {
  await waitForRender();
  let rect = element.getBoundingClientRect();
  let actions = new test_driver.Actions();
  // FIXME: Switch to pointerMove(0, 0, {origin: element}) once
  // https://github.com/web-platform-tests/wpt/issues/41257 is fixed.
  await actions
      .pointerMove(Math.round(rect.x + rect.width / 2), Math.round(rect.y + rect.height / 2), {})
      .send();
  await waitForRender();
}