1/*
2 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16const vnull = ((): Object | null | undefined => { return null })();
17const vundefined = ((): Object | null | undefined => { return undefined })();
18const vobject = ((): Object | null | undefined => { return new Object() })();
19
20function main() {
21    assert(null === null);
22    // assert(null !== undefined); // not compatible
23    assert(null !== vobject);
24    assert(undefined === undefined);
25    assert(undefined !== vobject);
26    assert(vobject === vobject);
27
28    assert(vnull === vnull);
29    assert(vnull !== vundefined);
30    assert(vnull !== vobject);
31    assert(vundefined === vundefined);
32    assert(vundefined !== vobject);
33
34    assert(null == null);
35    assert(null == undefined);
36    assert(null != vobject);
37    assert(undefined == undefined);
38    assert(undefined != vobject);
39    assert(vobject == vobject);
40
41    assert(vnull == vnull);
42    assert(vnull == vundefined);
43    assert(vnull != vobject);
44    assert(vundefined == vundefined);
45    assert(vundefined != vobject);
46}
47