### Question:
TimeEncoding { @Deprecated public static long currentInstant() { return taiUtcConverter.unixToInstant(System.currentTimeMillis()); }  static void setUp(); static void setUp(InputStream in); @Deprecated static long currentInstant(); static long getWallclockTime(); static String toString(long instant); static String toOrdinalDateTime(long instant); static String toWinCompatibleDateTime(long instant); static String toCombinedFormat(long instant); static long fromGpsCcsdsTime(int coarseTime, byte fineTime); static GpsCcsdsTime toGpsTime(final long instant); static GpsCcsdsTime getCurrentGpsTime(); static long toGpsTimeMillisec(final long instant); static long fromGpsYearSecMillis(int year, int secOfYear, int millis); static TaiUtcConverter.DateTimeComponents toUtc(long instant); static List<ValidityLine> getTaiUtcConversionTable(); static long parse(String s); @Deprecated static long fromUnixTime(long milliseconds); static long fromUnixMillisec(long milliseconds); static long fromUnixTime(long seconds, int microseconds); static long toUnixMillisec(long instant); static long fromCalendar(Calendar cal); static long fromDate(Date date); static Calendar toCalendar(long instant); static long getJavaGpsFromInstant(long instant); static long getInstantfromJavaGps(long javagps); static long fromGpsMillisec(long gpstime); static long fromTaiMillisec(long taitime); static long toTaiMillisec(long instant); static long fromJ2000Millisec(long j2000time); static long toJ2000Millisec(long instant); static long fromProtobufTimestamp(Timestamp ts); static Timestamp toProtobufTimestamp(long instant); static final long INVALID_INSTANT; static final long MIN_INSTANT; static long MAX_INSTANT; }### Answer:
@Test public void testCurrentInstant() { TimeEncoding.getWallclockTime(); long time = System.currentTimeMillis(); long instant = TimeEncoding.getWallclockTime(); long correction = Math.abs(instant - time) % 1000; assertTrue(correction < 3); time += correction; String sinstant = TimeEncoding.toString(instant); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"); sdf.setTimeZone(TimeZone.getTimeZone("UTC")); String stime = sdf.format(new Date(time)); assertEquals(sinstant, stime); }