TimeMachine

TimeMachine is a small library created to enable easy testing of code using JodaTime for date and time representation and has some logic depending upon getting the current date.

Usage

Suppose you have a ticket that should not be valid three days after its creation. You could write two tests for that:

@Test
public void should_be_valid_after_creation() {
    assertTrue(new Ticket().isValid());
}

@Test
public void should_not_be_valid_three_days_after_creation() {
    Ticket t = TimeMachine
                .goTo(new DateTime().minusDays(3))
                .andExecute(new Block<Ticket>() {
                    public Ticket run() {
                        return new Ticket();
                    }
                });
    assertFalse(t.isValid());
}

Inside the Block, a new instance of DateTime will be created pointing to three days ago, instead of pointing to the current date.