/**
 * Utility class for array operations.
 *
 * @author higa
 */
public abstract class ArrayUtil {

    /**
     * Do not instantiate.
     */
    protected ArrayUtil() {
    }

    /**
     * Returns an array of {@literal boolean}.
     *
     * @param elements the elements of the array
     * @return the array
     */
    public static boolean[] asBooleanArray(final boolean... elements) {

  }

  public void testSize1() {
    Iterator<Integer> iterator = singleton(0).iterator();
    assertEquals(1, Iterators.size(iterator));
  }

  public void testSize_partiallyConsumed() {
    Iterator<Integer> iterator = asList(1, 2, 3, 4, 5).iterator();
    iterator.next();
    iterator.next();
    assertEquals(3, Iterators.size(iterator));
  }

  public void test_contains_nonnull_yes() {

 * @author Mike Bostock
 * @author Vlad Patryshev
 */
@GwtCompatible
@NullMarked
public class FunctionsTest extends TestCase {

  public void testIdentity_same() {
    Function<@Nullable String, @Nullable String> identity = Functions.identity();
    assertNull(identity.apply(null));
    assertSame("foo", identity.apply("foo"));
  }

  public void testIdentity_notSame() {
    Function<Long, Long> identity = Functions.identity();

      super(source, target);
    }

    @Override
    public N source() {
      return nodeU();
    }

    @Override
    public N target() {
      return nodeV();
    }

    @Override
    public boolean isOrdered() {
      return true;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj == this) {
        return true;

    public static <E> TreeSet<E> newTreeSet() {
        return new TreeSet<>();
    }

    /**
     * Creates and returns a new instance of {@link TreeSet}.
     *
     * @param <E> the element type of {@link TreeSet}
     * @param c the collection of elements to be placed in the set
     * @return a new instance of {@link TreeSet}
     * @see TreeSet#TreeSet(Collection)
     */

        }

        public String getAppCipherAlgorism() {
            return get(FessConfig.APP_CIPHER_ALGORISM);
        }

        public String getAppCipherKey() {
            return get(FessConfig.APP_CIPHER_KEY);
        }

        public String getAppDigestAlgorism() {
            return get(FessConfig.APP_DIGEST_ALGORISM);
        }

        public String getAppEncryptPropertyPattern() {

    final String string;

    public HashHostileComparable(String string) {
      this.string = string;
    }

    @Override
    public int hashCode() {
      throw new UnsupportedOperationException();
    }

    @Override
    public int compareTo(HashHostileComparable o) {
      return string.compareTo(o.string);
    }
  }

  public void testSortedBuilderWithExpectedValuesPerKeyPositive() {

   */
  @Test
  public abstract void predecessors_checkReturnedSetMutability();

  /**
   * Verifies that the {@code Set} returned by {@code successors} has the expected mutability
   * property (see the {@code Network} documentation for more information).
   */
  @Test
  public abstract void successors_checkReturnedSetMutability();

  @Test
  public void nodes_oneNode() {
    addNode(N1);

  // ImmutableCollection.iterator() consistent.
  @Override
  public UnmodifiableIterator<E> iterator() {
    return listIterator();
  }

  @Override
  public UnmodifiableListIterator<E> listIterator() {
    return listIterator(0);
  }

  @SuppressWarnings("unchecked")
  @Override
  public UnmodifiableListIterator<E> listIterator(int index) {
    checkPositionIndex(index, size());

      offset += entry.getCount();
    }
    return offset;
  }

  @Override
  public boolean equals(@Nullable Object object) {
    return Multisets.equalsImpl(this, object);
  }

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(entrySet());
  }

  @Override
  public String toString() {
    return entrySet().toString();
  }

  /**