### Question:
TimelineUtilities { public static boolean isWeek(TimeSpan span) { Calendar startCal = CalendarUtilities.toCalendar(span.getStartDate()); return startCal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY && CalendarUtilities.isClearedFrom(startCal, CalendarUtilities.HOUR_INDEX) && span.getDuration().equalsIgnoreUnits(Weeks.ONE); } private  TimelineUtilities(); static void addDuration(Calendar calendar, Duration duration); static Calendar get0000(); static Calendar get0000(Date aDate); static List<TimeSpan> getIntervalsForSpan(Date startDate, TimeSpan span, int spanType); static Calendar getNext0000(Date aDate); static TimeSpan getPartialWeek(); static TimeSpan getPrecedingMonths(Date reference, int months, boolean includeThisMonth); static TimeSpan getPrecedingMonths(int months, boolean includeThisMonth); static TimeSpan getPrecedingWeeks(Date reference, int numWeeks, boolean includeThisWeek); static TimeSpan getPrecedingWeeks(int numWeeks, boolean includeThisWeek); static Map<Duration, List<DateDurationKey>> getTableOfLegalDates(TimeSpan span, Duration duration); static TimeSpan getThisDay(Date time); static TimeSpan getThisMonth(Date time); static TimeSpan getThisWeek(Date time); static TimeSpan getToday(); static TimeSpan getYesterday(); static boolean isAt0000(Date aDate); static boolean isDayWeekMonth(TimeSpan span); static boolean isDay(TimeSpan span); static boolean isWeek(TimeSpan span); static boolean isMonth(TimeSpan span); static boolean isRounded(Date time, Duration duration); static Calendar roundDown(Date date, Duration interval); static Calendar roundUp(Date date, Duration interval); static TimeSpan scale(TimeSpan span, double factor);  }### Answer:
@Test public void testIsWeek() throws ParseException { Assert.assertTrue(TimelineUtilities.isWeek(TimeSpanFormatterTest.span("2015-04-12 00:00:00", "2015-04-19 00:00:00"))); Assert.assertFalse(TimelineUtilities.isWeek(TimeSpanFormatterTest.span("2015-04-13 00:00:00", "2015-04-20 00:00:00"))); Assert.assertFalse(TimelineUtilities.isWeek(TimeSpanFormatterTest.span("2015-04-12 00:00:00", "2015-04-26 00:00:00"))); }