assertThat(identity.apply("foo")).isSameInstanceAs("foo");
  }

  public void testIdentity_notSame() {
    Function<Long, Long> identity = Functions.identity();
    assertThat(identity.apply(new Long(135135L))).isNotSameInstanceAs(new Long(135135L));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testIdentitySerializable() {

package com.google.common.eventbus;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import com.google.common.testing.EqualsTester;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Subscriber}.
 *

          interruptedDuringTask |= Thread.interrupted();
          try {
            task.run();
          } catch (Exception e) { // sneaky checked exception
            log.get().log(Level.SEVERE, "Exception while executing runnable " + task, e);
          } finally {
            task = null;
          }
        }
      } finally {

    /** The product version string. */
    protected String productVersion;

    /** The end-of-life timestamp for the application. */
    protected long eolTime;

    private short systemCpuPercent;

    private long systemCpuCheckTime;

    private long systemCpuCheckInterval = 1000L;

    private volatile short searchEngineCpuPercent;

    private volatile TimeoutTask loadControlMonitorTask;

            false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnCreatedTime = cci("createdTime", "createdTime", null, null, Long.class, "createdTime", null, false,
            false, false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnDuplicateHostName = cci("duplicateHostName", "duplicateHostName", null, null, String.class,

            false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnCreatedTime = cci("createdTime", "createdTime", null, null, Long.class, "createdTime", null, false,
            false, false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnQueries = cci("queries", "queries", null, null, String[].class, "queries", null, false, false, false,

            false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnCreatedTime = cci("createdTime", "createdTime", null, null, Long.class, "createdTime", null, false,
            false, false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnName = cci("name", "name", null, null, String.class, "name", null, false, false, false, "keyword", 0,

    /** Session ID for secure key management */
    private String sessionId = null;
    /** Time-to-live for cached authentication in milliseconds */
    private long authenticationTTL = 3600000L; // 1 hour default
    /** Timestamp when the authentication was created */
    private long authenticationTimestamp = System.currentTimeMillis();
    /** Flag to track if this authenticator has been closed */
    private volatile boolean closed = false;

  }

  public void testFlatMapToLong_nullStream() {
    SpliteratorTester.ofLong(
            () ->
                CollectSpliterators.flatMapToLong(
                    Arrays.spliterator(new Long[] {1L, 0L, 1L, 2L, 3L}),
                    (Long i) -> i == 0L ? null : LongStream.of(i).spliterator(),
                    Spliterator.SIZED | Spliterator.DISTINCT | Spliterator.NONNULL,
                    4))
        .expect(1L, 1L, 2L, 3L);
  }

            final long now, final Map<String, CacheEntry<DfsReferralDataInternal>> roots) throws SmbAuthException {
        DfsReferralDataInternal dr = null;
        if (log.isTraceEnabled()) {
            log.trace("Is a domain referral for " + domain);
        }

        if (log.isTraceEnabled()) {
            log.trace("Resolving root " + root);
        }
        /*