@Test
public void oldTimestampMustCauseTrialToBeOver() {

    Context context = mock(Context.class);
    TrialFactor factor = mock(TrialFactor.class);
    when(factor.readTimestamp(any(Context.class))).thenReturn(123L);
    SimpleTrial trial = new SimpleTrial(context, new SimpleTrial.Config().factors(factor));
    verify(factor).persistTimestamp(123L, context);
    assertTrue(trial.isTrialPeriodFinished());
}