* identical inputs: This sounds like it ought to be a problem here, since the goals of this class
   * include testing that {@code equals()} is reflexive and is tolerant of {@code null}. However,
   * there's no problem. The reason: {@link EqualsTester} tests {@code null} and identical inputs
   * directly against {@code equals()} rather than through the {@code Equivalence}.
   */
  private final Equivalence<? super T> equivalence;

 */

@SuppressWarnings("deprecation") // tests of a deprecated method
public class FilesCreateTempDirTest extends TestCase {
  public void testCreateTempDir() throws IOException {
    if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
      assertThrows(IllegalStateException.class, Files::createTempDir);
      return;
    }
    File temp = Files.createTempDir();
    try {
      assertThat(temp.exists()).isTrue();

    public T get() {
      return function.apply(supplier.get());
    }

    @Override
    public boolean equals(@CheckForNull Object obj) {
      if (obj instanceof SupplierComposition) {
        SupplierComposition<?, ?> that = (SupplierComposition<?, ?>) obj;
        return function.equals(that.function) && supplier.equals(that.supplier);
      }
      return false;
    }

    @Override
    public int hashCode() {

    @SuppressWarnings("unchecked")
    E e = (E) t;
    int unused = comparator().compare(e, e);
    return t;
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    return delegate.equals(obj);
  }

  @Override
  public int hashCode() {
    return delegate.hashCode();
  }

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

   * over keys in the order they were first encountered in the input, and the values for each key
   * are iterated in the order they were encountered. If two values for the same key are {@linkplain
   * Object#equals equal}, the first value encountered is used.
   *
   * @throws NullPointerException if any key, value, or entry is null
   * @since 19.0
   */
  public static <K, V> ImmutableSetMultimap<K, V> copyOf(

  }

  /**
   * Implementation of the {@code equals}, {@code hashCode}, and {@code toString} methods of {@link
   * Multiset.Entry}.
   */
  abstract static class AbstractEntry<E extends @Nullable Object> implements Multiset.Entry<E> {
    /**
     * Indicates whether an object equals this entry, following the behavior specified in {@link
     * Multiset.Entry#equals}.
     */
    @Override

    }
  }

  /** A holder of counters for calls to hashCode, equals, and compareTo. */
  private static final class CallsCounter {
    long hashCode;
    long equals;
    long compareTo;

    long total() {
      return hashCode + equals + compareTo;
    }

    void zero() {
      hashCode = 0;
      equals = 0;
      compareTo = 0;
    }
  }

  @FunctionalInterface

    BiPredicate<ImmutableListMultimap<?, ?>, ImmutableListMultimap<?, ?>> equivalence =
        Equivalence.equals()
            .onResultOf((ImmutableListMultimap<?, ?> mm) -> mm.asMap().entrySet().asList())
            .and(Equivalence.equals());
    CollectorTester.of(collector, equivalence)
        .expectCollects(ImmutableListMultimap.of())
        .expectCollects(

    @SuppressWarnings("EqualsHashCode")
    @Override
    public boolean equals(@Nullable Object other) {
      return (other instanceof ClassWhichIsAlwaysEqualButHasDifferentHashcodes);
    }
  }

  private static class ObjectWhichIsEqualButChangesClass implements Serializable {
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(@Nullable Object other) {

   * Collector} will be compared to the expected value using {@link Object#equals}.
   */
  public static <T extends @Nullable Object, A extends @Nullable Object, R extends @Nullable Object>
      CollectorTester<T, A, R> of(Collector<T, A, R> collector) {
    return of(collector, Objects::equals);
  }

  /**
   * Creates a {@code CollectorTester} for the specified {@code Collector}. The result of the {@code