DateUtil { public static String epochSecondToString(long metricTimestamp) { return epochSecondToInstant(metricTimestamp).toString(); }  static Instant truncatedToDay(Instant date); static Instant truncatedToWeek(Instant date); static Instant snapToSeconds(Instant date, int seconds); static Instant truncatedToSeconds(Instant date); static String epochSecondToString(long metricTimestamp); static Instant epochSecondToInstant(long metricTimestamp); static boolean isBetweenHours(int hour, int startHour, int endHour); static boolean crossesMidnight(int startHour, int endHour); static ZonedDateTime instantToUTCDateTime(Instant epochSecond); static final int MIDNIGHT_HOUR; }
@Test public void testEpochSecondToString() { assertEquals("2020-03-12T00:00:00Z", DateUtil.epochSecondToString(INSTANT_IN_EPOCH_SECONDS)); }