}

  /**
   * Test that a hash code miscomputed by "input.hashCode() * tooFarValue / 2" is correct under our
   * {@code hashCode} implementation.
   */
  public void testPowerSetHashCode_inputHashCodeTimesTooFarValueIsZero() {
    Set<Object> sumToEighthMaxIntElements =
        newHashSet(objectWithHashCode(1 << 29), objectWithHashCode(0));
    assertPowerSetHashCode(1 << 30, sumToEighthMaxIntElements);