@Test
public void t1_serialize() throws IOException {

	Date date = new GregorianCalendar(2018, Calendar.FEBRUARY, 11).getTime();
	String expected = (new DateTime(date).withZone(DateTimeZone.UTC).toDateTimeISO().toString());
	Mockito.doNothing().when(this.gen).writeString(Mockito.anyString());
	this.testee.serialize(date, gen, null);
	ArgumentCaptor<String> captor = ArgumentCaptor.forClass(String.class);
	Mockito.verify(this.gen).writeString(captor.capture());
	Assert.assertEquals(expected, captor.getValue());
}