wrapper.setElement(createElement("number", value));
assert new Short(value).equals(wrapper.convert(Short.class));
assert wrapper.convert(Short.TYPE).equals(Short.parseShort(value));
assert new Integer(value).equals(wrapper.convert(Integer.class));
assert wrapper.convert(Integer.TYPE).equals(Integer.parseInt(value));
assert new Long(value).equals(wrapper.convert(Long.class));
assert wrapper.convert(Long.TYPE).equals(Long.parseLong(value));