LibTest/core/Runes/singleWhere_A02_t01.dart

// Copyright (c) 2013, 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 E singleWhere(bool test(E element))
/// If no or more than one element match then a [StateError] is thrown.
/// @description Checks that a [StateError] is thrown if no element
/// matches [test].
/// @author msyabro

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

main() {
  var runes = new Runes('');
  Expect.throws(() {runes.singleWhere( (e) => true);}, (e) => e is StateError);

  runes = new Runes('\x01\x02\x03\x04\x05');
  Expect.throws(() {runes.singleWhere( (e) => e == 0);}, (e) => e is StateError);

  runes = new Runes('\x01\x02\x03\x04\x05');
  Expect.throws(() {runes.singleWhere( (e) => false);}, (e) => e is StateError);
}