### Question:
ChaosCalendar implements HolidayCalendar { @Override public ZoneId getTimeZoneId () { return timeZoneId; } ChaosCalendar(String timezoneName, int startOfDay, int endOfDay); @Override boolean isHoliday(Calendar day); @Override ZoneId getTimeZoneId(); @Override int getStartOfDay(); @Override int getEndOfDay(); @Override TimeZone getTimeZone();  }### Answer:
@Test public void getTimeZoneId () { assertEquals(ZoneId.of(timeZone), chaosCalendar.getTimeZoneId()); }