@Test
public void theDateAlwaysKeepsBeingTheSameWhenDecreasing() {
LocalDate today = new LocalDate();
IntraDayDate intraDate = IntraDayDate.create(today, hours(10));
assertThat(intraDate.decreaseBy(ResourcesPerDay.amount(1), hours(12))
.getDate(), equalTo(today));
}
@Test
public void calculateEffortBetweenTwoDates() {