@Test
public void testCalendarsSetModelUnchangedMinimalDaysInFirstWeek() {

    JXMonthView monthView = new JXMonthView();
    DateSelectionModel model = new DaySelectionModel();
    int first = model.getMinimalDaysInFirstWeek() + 1;
    model.setMinimalDaysInFirstWeek(first);
    monthView.setSelectionModel(model);
    assertEquals("model minimals must not be changed", 
            first, model.getMinimalDaysInFirstWeek());
}