Language/12_Expressions/00_Object_Identity/1_Object_Identity_A04_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 The predefined Dart function identical() is defined such that identical(c1, c2) iff:
 *   c1 and c2 are constant maps that are defined to be identical
 *   in the specification of literal map expressions.
 * @description Checks that constatnt maps are identical() if they have both
 * identical types and content.
 * @author kaigorodov
 */
import "../../../Utils/expect.dart";

const nums1=const <num,String>{};
const nums2=const <num,String>{};
const ints1=const <int,String>{};
const ints2=const <int,String>{};
const doubles1=const <double,String>{};
const doubles2=const <double,String>{};

main() {
  Expect.isTrue(identical(nums1, nums2));
  Expect.isTrue(identical(ints1, ints2));
  Expect.isTrue(identical(doubles1, doubles2));

  Expect.isFalse(identical(nums1, ints1));
  Expect.isFalse(identical(nums1, doubles1));
  Expect.isFalse(identical(ints1, doubles1));
}