LibTest/collection/HashSet/HashSet.from_A02_t01.dart

// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion interface HashSet.from(Iterable elements)
/// All the [elements] should be assignable to [E]. [The elements] iterable
/// itself may have any element type, so this constructor can be used to
/// down-cast a [Set], for example as:
/// Set<SuperType> superSet = ...;
/// Set<SubType> subSet =
///     new HashSet<SubType>.from(superSet.where((e) => e is SubType));
/// @description Checks that HashSet.from throws TypeError if [elements]
/// contains element of incompatible type
/// @author iarkh@unipro.ru

import "../../../Utils/expect.dart";
import "dart:collection";

main() {
  Expect.throws(() {
    new HashSet<int>.from(["testme", 1, 2, 3, null, "", [], [1, 2, 3], {},
      new Error(), -1, -2, "string1", "string2", "string3", 'a', 'b', 'c']);
  }, (e) => e is TypeError || e is CastError
  );
}