@Test
public void testDefaultDateFormats() throws ParseException {
SimpleDateFormat df = new SimpleDateFormat("MM/dd/yy");
Person charlie = new Person("Charlie", "Hubbard", new Date(), null, null);
charlie.setBirthdate(df.parse("03/21/76"));
DateTransformer transformer = new DateTransformer( df.toPattern() );
String json = new JSONSerializer().transform(transformer, "birthdate").serialize(charlie);
Person newUser = new JSONDeserializer<Person>().deserialize(json);
assertEquals( charlie.getBirthdate(), newUser.getBirthdate() );