// Copyright (c) 2012, 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.

library unittest.matcher.test_common;

import 'dart:collection';

import 'package:unittest/unittest.dart';

class Widget {
  int price;
}

class HasPrice extends CustomMatcher {
  HasPrice(matcher) : super("Widget with a price that is", "price", matcher);
  featureValueOf(actual) => actual.price;
}

class SimpleIterable extends IterableBase<int> {
  final int count;

  SimpleIterable(this.count);

  bool contains(Object val) => val is int && val <= count;

  bool any(bool f(element)) {
    for (var i = 0; i <= count; i++) {
      if (f(i)) return true;
    }
    return false;
  }

  String toString() => "<[$count]>";

  Iterator<int> get iterator {
    return new _SimpleIterator(count);
  }
}

class _SimpleIterator implements Iterator<int> {
  int _count;
  int _current;

  _SimpleIterator(this._count);

  bool moveNext() {
    if (_count > 0) {
      _current = _count;
      _count--;
      return true;
    }
    _current = null;
    return false;
  }

  int get current => _current;
}