gt:             System.err.format("     Got: %s\n", result);
context: /*
   * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  /* @test
   * @bug 6844313 8011647
   * @summary Unit test for java.nio.file.FileTime
   * @key randomness
   */
  
  
  import java.nio.file.attribute.FileTime;
  import java.time.Instant;
  import java.util.concurrent.TimeUnit;
  import static java.util.concurrent.TimeUnit.*;
  import java.util.Random;
  import java.util.EnumSet;
  
  public class Basic {
  
      static final Random rand = new Random();
  
      public static void main(String[] args) {
          long now = System.currentTimeMillis();
          long tomorrowInDays = TimeUnit.DAYS.convert(now, MILLISECONDS) + 1;
          long yesterdayInDays = TimeUnit.DAYS.convert(now, MILLISECONDS) - 1;
  
          Instant nowInstant = Instant.ofEpochMilli(now);
  
          // equals
          eq(now, MILLISECONDS, now, MILLISECONDS);
          eq(now, MILLISECONDS, now*1000L, MICROSECONDS);
          neq(now, MILLISECONDS, 0, MILLISECONDS);
          neq(now, MILLISECONDS, 0, MICROSECONDS);
  
          eq(nowInstant, now, MILLISECONDS);
          eq(nowInstant, now*1000L, MICROSECONDS);
          neq(nowInstant, 0, MILLISECONDS);
          neq(nowInstant, 0, MICROSECONDS);
  
          // compareTo
          cmp(now, MILLISECONDS, now, MILLISECONDS, 0);
          cmp(now, MILLISECONDS, now*1000L, MICROSECONDS, 0);
          cmp(now, MILLISECONDS, now-1234, MILLISECONDS, 1);
          cmp(now, MILLISECONDS, now+1234, MILLISECONDS, -1);
  
          cmp(tomorrowInDays, DAYS, now, MILLISECONDS, 1);
          cmp(now, MILLISECONDS, tomorrowInDays, DAYS, -1);
          cmp(yesterdayInDays, DAYS, now, MILLISECONDS, -1);
          cmp(now, MILLISECONDS, yesterdayInDays, DAYS, 1);
          cmp(yesterdayInDays, DAYS, now, MILLISECONDS, -1);
  
          cmp(Long.MAX_VALUE, DAYS, Long.MAX_VALUE, NANOSECONDS, 1);
          cmp(Long.MAX_VALUE, DAYS, Long.MIN_VALUE, NANOSECONDS, 1);
          cmp(Long.MIN_VALUE, DAYS, Long.MIN_VALUE, NANOSECONDS, -1);
          cmp(Long.MIN_VALUE, DAYS, Long.MAX_VALUE, NANOSECONDS, -1);
  
          cmp(Instant.MIN, Long.MIN_VALUE, DAYS, 1);
          cmp(Instant.MIN, Long.MIN_VALUE, HOURS, 1);
          cmp(Instant.MIN, Long.MIN_VALUE, MINUTES, 1);
          cmp(Instant.MIN, Long.MIN_VALUE, SECONDS, 1);
          cmp(Instant.MIN, Instant.MIN.getEpochSecond() - 1, SECONDS, 1);
          cmp(Instant.MIN, Instant.MIN.getEpochSecond() - 100, SECONDS, 1);
          cmp(Instant.MIN, Instant.MIN.getEpochSecond(), SECONDS, 0);
  
          cmp(Instant.MAX, Long.MAX_VALUE, DAYS, -1);
          cmp(Instant.MAX, Long.MAX_VALUE, HOURS, -1);
          cmp(Instant.MAX, Long.MAX_VALUE, MINUTES, -1);
          cmp(Instant.MAX, Long.MAX_VALUE, SECONDS, -1);
          cmp(Instant.MAX, Instant.MAX.getEpochSecond() + 1, SECONDS, -1);
          cmp(Instant.MAX, Instant.MAX.getEpochSecond() + 100, SECONDS, -1);
          cmp(Instant.MAX, Instant.MAX.getEpochSecond(), SECONDS, 0);
  
          cmp(nowInstant, now, MILLISECONDS, 0);
          cmp(nowInstant, now*1000L, MICROSECONDS, 0);
          cmp(nowInstant, now-1234, MILLISECONDS, 1);
          cmp(nowInstant, now+1234, MILLISECONDS, -1);
          cmp(nowInstant, tomorrowInDays, DAYS, -1);
          cmp(nowInstant, yesterdayInDays, DAYS, 1);
  
          // to(TimeUnit)
          to(MILLISECONDS.convert(1, DAYS) - 1, MILLISECONDS);
          to(MILLISECONDS.convert(1, DAYS) + 0, MILLISECONDS);
          to(MILLISECONDS.convert(1, DAYS) + 1, MILLISECONDS);
          to(1, MILLISECONDS);
          to(0, MILLISECONDS);
          to(1, MILLISECONDS);
          to(MILLISECONDS.convert(-1, DAYS) - 1, MILLISECONDS);
          to(MILLISECONDS.convert(-1, DAYS) + 0, MILLISECONDS);
          to(MILLISECONDS.convert(-1, DAYS) + 1, MILLISECONDS);
          for (TimeUnit unit: TimeUnit.values()) {
              for (int i=0; i<100; i++) { to(rand.nextLong(), unit); }
              to(Long.MIN_VALUE, unit);
              to(Long.MAX_VALUE, unit);
          }
  
          // toInstant()
          int N = 1000;
          for (TimeUnit unit : EnumSet.allOf(TimeUnit.class)) {
              for (int i = 0; i < N; i++) {
                  long value = rand.nextLong();
                  FileTime ft = FileTime.from(value, unit);
                  Instant instant = ft.toInstant();
                  if (instant != Instant.MIN && instant != Instant.MAX) {
                      eqTime(value, unit, instant);
                  }
              }
          }
          for (TimeUnit unit : EnumSet.allOf(TimeUnit.class)) {
              long value = Long.MIN_VALUE;
              FileTime ft = FileTime.from(value, unit);
              Instant instant = ft.toInstant();
              if (unit.compareTo(TimeUnit.SECONDS) < 0) {
                  eqTime(value, unit, instant);
              } else if (!instant.equals(Instant.MIN)) {
                  throw new RuntimeException("should overflow to MIN");
              }
              value = Long.MAX_VALUE;
              ft = FileTime.from(value, unit);
              instant = ft.toInstant();
              if (unit.compareTo(TimeUnit.SECONDS) < 0) {
                  eqTime(value, unit, instant);
              } else if (!instant.equals(Instant.MAX)) {
                  throw new RuntimeException("should overflow to MAX");
              }
          }
  
          // from(Instant)
          final long MAX_SECOND = 31556889864403199L;
          for (int i = 0; i < N; i++) {
              long v = rand.nextLong();
              long secs = v % MAX_SECOND;
              Instant instant = Instant.ofEpochSecond(secs, rand.nextInt(1000_000_000));
              FileTime ft = FileTime.from(instant);
              if (!ft.toInstant().equals(instant) || ft.to(SECONDS)  != secs) {
                  throw new RuntimeException("from(Instant) failed");
              }
              long millis = v;
              instant = Instant.ofEpochMilli(millis);
              ft = FileTime.from(instant);
              if (!ft.toInstant().equals(instant) ||
                  ft.toMillis()  != instant.toEpochMilli()) {
                  throw new RuntimeException("from(Instant) failed");
              }
              long nanos = v;
              ft = FileTime.from(nanos, NANOSECONDS);
              secs = nanos / 1000_000_000;
              nanos = nanos % 1000_000_000;
              instant = Instant.ofEpochSecond(secs, nanos);
              if (!ft.equals(FileTime.from(instant))) {
                  throw new RuntimeException("from(Instant) failed");
              }
          }
  
          // toString
          ts(1L, DAYS, "1970-01-02T00:00:00Z");
          ts(1L, HOURS, "1970-01-01T01:00:00Z");
          ts(1L, MINUTES, "1970-01-01T00:01:00Z");
          ts(1L, SECONDS, "1970-01-01T00:00:01Z");
          ts(1L, MILLISECONDS, "1970-01-01T00:00:00.001Z");
          ts(1L, MICROSECONDS, "1970-01-01T00:00:00.000001Z");
          ts(1L, NANOSECONDS, "1970-01-01T00:00:00.000000001Z");
          ts(999999999L, NANOSECONDS, "1970-01-01T00:00:00.999999999Z");
          ts(9999999999L, NANOSECONDS, "1970-01-01T00:00:09.999999999Z");
  
          ts(-1L, DAYS, "1969-12-31T00:00:00Z");
          ts(-1L, HOURS, "1969-12-31T23:00:00Z");
          ts(-1L, MINUTES, "1969-12-31T23:59:00Z");
          ts(-1L, SECONDS, "1969-12-31T23:59:59Z");
          ts(-1L, MILLISECONDS, "1969-12-31T23:59:59.999Z");
          ts(-1L, MICROSECONDS, "1969-12-31T23:59:59.999999Z");
          ts(-1L, NANOSECONDS, "1969-12-31T23:59:59.999999999Z");
          ts(-999999999L, NANOSECONDS, "1969-12-31T23:59:59.000000001Z");
          ts(-9999999999L, NANOSECONDS, "1969-12-31T23:59:50.000000001Z");
  
          ts(-62135596799999L, MILLISECONDS, "0001-01-01T00:00:00.001Z");
          ts(-62135596800000L, MILLISECONDS, "0001-01-01T00:00:00Z");
          ts(-62135596800001L, MILLISECONDS, "-0001-12-31T23:59:59.999Z");
  
          ts(253402300799999L, MILLISECONDS, "9999-12-31T23:59:59.999Z");
          ts(-377642044800001L, MILLISECONDS, "-9999-12-31T23:59:59.999Z");
  
          // NTFS epoch in usec.
          ts(-11644473600000000L, MICROSECONDS, "1601-01-01T00:00:00Z");
  
          ts(Instant.MIN, "-1000000001-01-01T00:00:00Z");
          ts(Instant.MAX, "1000000000-12-31T23:59:59.999999999Z");
  
          try {
              FileTime.from(0L, null);
              throw new RuntimeException("NullPointerException expected");
          } catch (NullPointerException npe) { }
          try {
              FileTime.from(null);
              throw new RuntimeException("NullPointerException expected");
          } catch (NullPointerException npe) { }
  
          FileTime time = FileTime.fromMillis(now);
          if (time.equals(null))
              throw new RuntimeException("should not be equal to null");
          try {
              time.compareTo(null);
              throw new RuntimeException("NullPointerException expected");
          } catch (NullPointerException npe) { }
  
          // Instant + toMilli() overflow
          overflow(Long.MAX_VALUE,
                   FileTime.from(Instant.MAX).toMillis());
          overflow(Long.MAX_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MAX_VALUE / 1000 + 1))
                           .toMillis());
          overflow(Long.MIN_VALUE,
                   FileTime.from(Instant.MIN).toMillis());
          overflow(Long.MIN_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MIN_VALUE / 1000 - 1))
                           .toMillis());
  
          // Instant + to(TimeUnit) overflow
          overflow(Long.MAX_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MAX_VALUE / 1000 + 1))
                           .to(MILLISECONDS));
          overflow(Long.MAX_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MAX_VALUE / 1000,
                                                       MILLISECONDS.toNanos(1000)))
                      .to(MILLISECONDS));
          overflow(Long.MIN_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MIN_VALUE / 1000 - 1))
                           .to(MILLISECONDS));
          overflow(Long.MIN_VALUE,
                   FileTime.from(Instant.ofEpochSecond(Long.MIN_VALUE / 1000,
                                                       -MILLISECONDS.toNanos(1)))
                           .to(MILLISECONDS));
      }
  
      static void overflow(long minmax, long v) {
          if (v != minmax)
              throw new RuntimeException("saturates to Long.MIN/MAX_VALUE expected");
      }
  
      static void cmp(long v1, TimeUnit u1, long v2, TimeUnit u2, int expected) {
          int result = FileTime.from(v1, u1).compareTo(FileTime.from(v2, u2));
          if (result != expected)
              throw new RuntimeException("unexpected order");
      }
  
      static void cmp(Instant ins, long v2, TimeUnit u2, int expected) {
          int result = FileTime.from(ins).compareTo(FileTime.from(v2, u2));
          if (result != expected)
              throw new RuntimeException("unexpected order");
      }
  
      static void eq(long v1, TimeUnit u1, long v2, TimeUnit u2) {
          FileTime t1 = FileTime.from(v1, u1);
          FileTime t2 = FileTime.from(v2, u2);
          if (!t1.equals(t2))
              throw new RuntimeException("not equal");
          if (t1.hashCode() != t2.hashCode())
              throw new RuntimeException("hashCodes should be equal");
      }
  
      static void eq(Instant ins, long v2, TimeUnit u2) {
          FileTime t1 = FileTime.from(ins);
          FileTime t2 = FileTime.from(v2, u2);
          if (!t1.equals(t2))
              throw new RuntimeException("not equal");
          if (t1.hashCode() != t2.hashCode())
              throw new RuntimeException("hashCodes should be equal");
      }
  
      static void eqTime(long value, TimeUnit unit, Instant instant) {
          long secs = SECONDS.convert(value, unit);
          long nanos = NANOSECONDS.convert(value - unit.convert(secs, SECONDS), unit);
          if (nanos < 0) {    // normalize nanoOfSecond to positive
              secs -= 1;
              nanos += 1000_000_000;
          }
          if (secs != instant.getEpochSecond() || (int)nanos != instant.getNano()) {
              System.err.println(" ins=" + instant);
              throw new RuntimeException("ft and instant are not the same time point");
          }
      }
  
      static void neq(long v1, TimeUnit u1, long v2, TimeUnit u2) {
          FileTime t1 = FileTime.from(v1, u1);
          FileTime t2 = FileTime.from(v2, u2);
          if (t1.equals(t2))
              throw new RuntimeException("should not be equal");
      }
  
      static void neq(Instant ins, long v2, TimeUnit u2) {
          FileTime t1 = FileTime.from(ins);
          FileTime t2 = FileTime.from(v2, u2);
          if (t1.equals(t2))
              throw new RuntimeException("should not be equal");
      }
  
      static void to(long v, TimeUnit unit) {
          FileTime t = FileTime.from(v, unit);
          for (TimeUnit u: TimeUnit.values()) {
              long result = t.to(u);
              long expected = u.convert(v, unit);
              if (result != expected) {
                  throw new RuntimeException("unexpected result");
              }
          }
      }
  
      static void ts(long v, TimeUnit unit, String expected) {
          String result = FileTime.from(v, unit).toString();
          if (!result.equals(expected)) {
              System.err.format("FileTime.from(%d, %s).toString() failed\n", v, unit);
              System.err.format("Expected: %s\n", expected);
              System.err.format("     Got: %s\n", result);
              throw new RuntimeException();
          }
      }
  
      static void ts(Instant instant, String expected) {
          String result = FileTime.from(instant).toString();
          if (!result.equals(expected)) {
              System.err.format("FileTime.from(%s).toString() failed\n", instant);
              System.err.format("Expected: %s\n", expected);
  