LibTest/core/Runes/firstWhere_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 dynamic firstWhere(bool test(E element), {Object orElse()})
/// If none matches, the result of invoking the orElse function is returned.
/// @description Checks that the [orElse] function is invoked and
/// its result is returned if no element matches [test].
/// @author msyabro

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

main() {
  var count = 0;
  f () {
    count++;
    return 1;
  }
  var runes = new Runes('\x01\x02\x03\x04\x05\x06\x09');
  var res = runes.firstWhere( (element) => false, orElse: f);
  Expect.equals(1, count);
  Expect.equals(1, res);

  res = runes.firstWhere( (element) => element > 100, orElse: f);
  Expect.equals(2, count);
  Expect.equals(1, res);

  runes = new Runes('');
  res = runes.firstWhere( (element) => true, orElse: f);
  Expect.equals(3, count);
  Expect.equals(1, res);
}