Set<Integer> set = ContiguousSet.create(Range.closed(0, 10000), DiscreteDomain.integers());
    assertThrows(IllegalArgumentException.class, () -> cartesianProduct(set, set, set, set, set));
  }

  public void testCartesianProduct_hashCode() {
    // Run through the same cartesian products we tested above

    Set<List<Integer>> degenerate = cartesianProduct();
    checkHashCode(degenerate);

    checkHashCode(cartesianProduct(set(1, 2)));