browser/src/tests/html/select.html

<script src="../testing.js"></script>

<form id=f1>
 <select id=s1 name=s1><option>o1<option>o2</select>
</form>
<select id=s2></select>

<script id=select>
  const s = document.getElementById('s1');
  testing.expectEqual('[object HTMLFormElement]', s.form.toString());
  testing.expectEqual(null, document.getElementById('s2').form);

  testing.expectEqual(false, s.disabled);
  s.disabled = true;
  testing.expectEqual(true, s.disabled);

  s.disabled = false;
  testing.expectEqual(false, s.disabled);

  testing.expectEqual(false, s.multiple);
  s.multiple = true;
  testing.expectEqual(true, s.multiple);
  s.multiple = false;
  testing.expectEqual(false, s.multiple);

  testing.expectEqual('s1', s.name);
  s.name = 'sel1';
  testing.expectEqual('sel1', s.name);

  testing.expectEqual(2, s.length);

  testing.expectEqual(0, s.selectedIndex);
  s.selectedIndex = 2; // out of range
  testing.expectEqual(-1, s.selectedIndex);

  s.selectedIndex = -1;
  testing.expectEqual(-1, s.selectedIndex);

  s.selectedIndex = 0;
  testing.expectEqual(0, s.selectedIndex);

  s.selectedIndex = 1;
  testing.expectEqual(1, s.selectedIndex);

  s.selectedIndex = -323;
  testing.expectEqual(-1, s.selectedIndex);

  let options = s.options;
  testing.expectEqual(2, options.length);
  testing.expectEqual('o2', options.item(1).value);
  testing.expectEqual(-1, options.selectedIndex);

  let o3 = document.createElement('option');
  o3.value = 'o3';
  options.add(o3)
  testing.expectEqual(3, options.length);
  testing.expectEqual('o3', options.item(2).value);

  let o4 = document.createElement('option');
  o4.value = 'o4';
  options.add(o4, 1);
  testing.expectEqual(4, options.length);
  testing.expectEqual('o4', options.item(1).value);

  let o5 = document.createElement('option');
  o5.value = 'o5';
  options.add(o5, o3)
  testing.expectEqual(5, options.length);
  testing.expectEqual('o5', options.item(3).value);

  options.remove(3)
  testing.expectEqual(4, options.length);
  testing.expectEqual('o3', options.item(3).value);
</script>