void testClockTimezone() {
        MonotonicClock clock = MonotonicClock.get();

        assertEquals(ZoneOffset.UTC, clock.getZone(), "Clock should use UTC timezone");

        // Verify that attempting to change timezone returns the same instance
        Clock newClock = clock.withZone(ZoneId.systemDefault());
        assertSame(clock, newClock, "withZone() should return the same clock instance");
    }

    @Test

package org.apache.maven.api;

import java.time.Clock;
import java.time.Duration;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZoneOffset;

/**
 * A Clock implementation that combines monotonic timing with wall-clock time.
 * <p>
 * This class provides precise time measurements using {@link System#nanoTime()}
 * while maintaining wall-clock time information in UTC. The wall-clock time

                Throwable t) {
            // record the error and mark the project as failed
            Clock clock = getClock(mavenProject);
            buildContext.getResult().addException(t);
            buildContext
                    .getResult()
                    .addBuildSummary(new BuildFailure(mavenProject, clock.execTime(), clock.wallTime(), t));

            // notify listeners about "soft" project build failures only

        /** The high field of the timestamp multiplexed with the version number */
        public short time_hi_and_version;
        /** The high field of the clock sequence multiplexed with the variant */
        public byte clock_seq_hi_and_reserved;
        /** The low field of the clock sequence */
        public byte clock_seq_low;
        /** The spatially unique node identifier */
        public byte[] node;

        @Override

      },
      logger = logger,
    )

  /** Runs all tasks that are ready. Used by the test thread only. */
  fun runTasks() {
    advanceUntil(nanoTime)
  }

  /** Advance the simulated clock, then runs tasks that are ready. Used by the test thread only. */
  fun advanceUntil(newTime: Long) {
    taskRunner.assertLockNotHeld()

    taskRunner.withLock {
      check(currentTask == TestThreadSerialTask)

         */
        public short time_hi_and_version;
        /**
         * The high field of the clock sequence multiplexed with the variant.
         */
        public byte clock_seq_hi_and_reserved;
        /**
         * The low field of the clock sequence.
         */
        public byte clock_seq_low;
        /**
         * The spatially unique node identifier (6 bytes).
         */

	trnDate, err := time.Parse(time.RFC3339, dateStr)
	if err != nil {
		return errTransitionInvalidDate
	}
	// Allow only date timestamp specifying midnight GMT
	hr, m, sec := trnDate.Clock()
	nsec := trnDate.Nanosecond()
	loc := trnDate.Location()
	if hr != 0 || m != 0 || sec != 0 || nsec != 0 || loc.String() != time.UTC.String() {
		return errTransitionDateNotMidnight
	}

            when(mockNdrBuffer.dec_ndr_short()).thenReturn((int) (short) 0x9ABC, (int) (short) 0xDEF0);
            when(mockNdrBuffer.dec_ndr_small()).thenReturn((int) (byte) 0x11, (int) (byte) 0x22, // clock seq bytes
                    (int) (byte) 0xAA, (int) (byte) 0xBB, (int) (byte) 0xCC, (int) (byte) 0xDD, (int) (byte) 0xEE, (int) (byte) 0xFF // node bytes
            );

 * doing so does <i>not</i> give a reliable measurement of elapsed time, because wall time readings
 * are inherently approximate, routinely affected by periodic clock corrections. Because this class
 * (by default) uses {@link System#nanoTime}, it is unaffected by these changes.
 *
 * <p>Use this class instead of direct calls to {@link System#nanoTime} for two reasons:
 *
 * <ul>

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.suggest.entity;

import java.time.Clock;
import java.time.Instant;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;