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
16class Person {
17    name: String = "Bill";
18}
19
20function dummy(): Person | null {
21    return null;
22}
23
24function main(): void {
25  let bill : Person = new Person();
26  let name = bill.name;
27
28  assert(name == "Bill");
29  assert(name.length == 4);
30
31  name = bill.name;
32  assert(name == "Bill");
33
34  let juan: Person | null = dummy();
35  name = juan?.name ?? "Juan";
36  assert (name.length == 4);
37
38  let test = false;
39
40  assert(juan?.name === undefined);
41}
42