* required, to have the following properties:
   *
   * <ul>
   *   <li>Its execution does not cause any observable side effects.
   *   <li>The computation is <i>consistent with equals</i>; that is, {@link Objects#equal
   *       Objects.equal}{@code (a, b)} implies that {@code predicate.apply(a) ==
   *       predicate.apply(b))}.
   * </ul>
   *

    HashCode hashCodeA = HashCode.fromBytes(bytesA);
    HashCode hashCodeB = HashCode.fromBytes(bytesB);

    // They aren't equal...
    assertFalse(hashCodeA.equals(hashCodeB));

    // But they still have the same Object#hashCode() value.
    // Technically not a violation of the equals/hashCode contract, but...?
    assertEquals(hashCodeA.hashCode(), hashCodeB.hashCode());
  }

    byte[] b4 = "ニュース".getBytes(Charsets.US_ASCII);
    byte[] b5 = "スューー".getBytes(Charsets.US_ASCII);
    // Assert they are all equal (using the transitive property)
    assertTrue(Arrays.equals(b1, b2));
    assertTrue(Arrays.equals(b2, b3));
    assertTrue(Arrays.equals(b3, b4));
    assertTrue(Arrays.equals(b4, b5));
  }

    File i18nFile = getTestFile("i18n.txt");
    assertFalse(Files.equal(asciiFile, i18nFile));
    assertTrue(Files.equal(asciiFile, asciiFile));

    File temp = createTempFile();
    Files.copy(asciiFile, temp);
    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);

        // Test that different instances are not equal
        DictionaryExpiredException exception1 = new DictionaryExpiredException();
        DictionaryExpiredException exception2 = new DictionaryExpiredException();

        assertNotSame(exception1, exception2);
        assertFalse(exception1.equals(exception2));
        assertTrue(exception1.equals(exception1));
    }

    public void test_hashCode() {

   * {@code C}:
   *
   * <ul>
   *   <li>If {@code C} explicitly implements {@link Object#equals}, the deserialized instance will
   *       be checked to be equal to the instance before serialization.
   *   <li>If {@code C} doesn't explicitly implement {@code equals} but instead inherits it from a
   *       superclass, no equality check is done on the deserialized instance because it's not clear

 *
 * <p>This class does <i>not</i> forward the {@code hashCode} and {@code equals} methods through to
 * the backing object, but relies on {@code Object}'s implementation. This is necessary to preserve
 * the symmetry of {@code equals}. Custom definitions of equality are usually based on an interface,
 * such as {@code Set} or {@code List}, so that the implementation of {@code equals} can cast the

     * Implementations must ensure that if two requests are equal according to
     * {@link #equals(Object)}, they have the same hashcode.
     *
     * @return a hash code value for this request
     */
    @Override
    int hashCode();

    /**
     * Returns {@code true} if the specified object is equal to this request.
     * Two requests are considered equal if they have the same type and all
     * significant fields are equal.

    @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) {

    }

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

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof DummyHandler) {
        DummyHandler that = (DummyHandler) obj;
        return identity().equals(that.identity());
      } else {
        return false;
      }
    }

    private DummyProxy identity() {