### Question:
TimeUtil { public static long daysToMillis(long days) { long daysInMillis = days * 24L * 60L * 60000L; return daysInMillis; }  static long minutesToMillis(long minutes); static SimpleDateFormat standardDateFormater(); static Date fromString(String value); static String dateToString(Date value); static Date currentDate(); static long daysToMillis(long days); static Date beginningOfDay(Date date); static Date endOfDay(Date date); static String millisToString(long millis);  }### Answer:
@Test public void testDaysToMillis() { System.out.println("daysToMillis"); long days = 1L; long expResult = 86400000L; long result = TimeUtil.daysToMillis(days); assertEquals(expResult, result); }