@Test
public void testCornerCaseSerializationLegnth()
{

  final Map<String, Type> fieldToType = Maps.newHashMap();
  fieldToType.put("a", Type.OBJECT);
  fieldToType.put("b", Type.OBJECT);
  GPOMutable gpo = new GPOMutable(new FieldsDescriptor(fieldToType));
  int serializeLength = GPOUtils.serializedLength(gpo);
  Assert.assertEquals(0, serializeLength);
}