@Test
  public void testHasWorkingDaysDifferent() {

    List<Integer> workingDays =
        Arrays.asList(
            DateTimeConstants.MONDAY,
            DateTimeConstants.TUESDAY,
            DateTimeConstants.WEDNESDAY,
            DateTimeConstants.THURSDAY,
            DateTimeConstants.FRIDAY);

    List<Integer> workingDaysToCompare =
        Arrays.asList(
            DateTimeConstants.MONDAY,
            DateTimeConstants.TUESDAY,
            DateTimeConstants.WEDNESDAY,
            DateTimeConstants.THURSDAY,
            DateTimeConstants.SUNDAY);

    WorkingTime workingTime = new WorkingTime();
    workingTime.setWorkingDays(workingDays, DayLength.FULL);

    boolean returnValue = workingTime.hasWorkingDays(workingDaysToCompare);

    Assert.assertFalse("Working days are identical", returnValue);
  }