setLeft, 0, 'legend.offsetLeft');
  assert_equals(legend.offsetTop, 0, 'legend.offsetTop');
  assert_equals(legend.clientHeight, 0, 'legend.clientHeight');
  const divAfter = legend.nextElementSibling;
  assert_equals(divAfter.offsetLeft, 100, 'divAfter.offsetLeft');
  assert_equals(divAfter.offsetTop, 0, 'divAfter.offsetTop');
}, 'in-body');

test(() => {
  const legend = document.getElementById('rendered-legend');
  assert_equals(legend.offsetLeft, fieldsetBorderWidth, 'legend.offsetLeft');
  assert_equal