LibTest/collection/LinkedList/singleWhere_A01_t01.dart

/*
 * Copyright (c) 2011, 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 value))
 * Returns the single element that satisfies test.
 * @description Checks that the single element that satisfies the given predicate f
 * is returned.
 * @author kaigorodov
 */
import "dart:collection";
import "../../../Utils/expect.dart";
import "LinkedList.lib.dart";

check(List a0, test(value), int expected) {
  LinkedList a=toLinkedList(a0);
  bool test2(MyLinkedListEntry<int> value) =>
    test(value.value);
  int actual=a.singleWhere(test2).value;
  Expect.equals(expected, actual);
}

main() {
  check([1,2,-3,0], (value)=>value>1, 2);
  check(const[1,2,-5,-6], (value)=>value==1, 1);
}