LibTest/collection/IterableMixin/every_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 bool every(bool f(E element))
/// Checks every [element] in iteration order
/// @description Checks that elements get checked in the iteration order.
/// @author iarkh@unipro.ru

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

class MyIterable extends Object with IterableMixin {
  List _content;
  MyIterable(List list): _content = list;

  Iterator get iterator {
    return _content.iterator;
  }
}

main() {
  List original = [1, 2, 7, -5, 9, 16, 4];
  List res = [];
  MyIterable iterable = new MyIterable(original);

  iterable.every((var element) {
      res.add(element);
      return true;
    });
  Expect.listEquals(original, res);

  res.clear();
  iterable.every((var element) {
    res.add(element);
    return element > 0;
  });
  Expect.listEquals(res, [1, 2, 7, -5]);

  res.clear();
  iterable.every((var element) {
    res.add(element);
    return element < 10;
  });
  Expect.listEquals(res, [1, 2, 7, -5, 9, 16]);
}