Set<Object> sumToEighthMaxIntElements =
        newHashSet(objectWithHashCode(1 << 29), objectWithHashCode(0));
    assertPowerSetHashCode(1 << 30, sumToEighthMaxIntElements);

    Set<Object> sumToQuarterMaxIntElements =
        newHashSet(objectWithHashCode(1 << 30), objectWithHashCode(0));
    assertPowerSetHashCode(1 << 31, sumToQuarterMaxIntElements);
  }