@Test(expected = IllegalArgumentException.class)
public void untilADayAgo() {
IntraDayDate start = IntraDayDate.create(today, zero());
IntraDayDate end = IntraDayDate.create(tomorrow, zero());
end.daysUntil(start);
}
@Test
public void untilTwoDaysLaterReturnsTwoPartialDays() {
IntraDayDate start = IntraDayDate.create(today, zero());