1/*
2 * Copyright (c) 2021-2024 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
16function foo(form?: String) {
17    const f = (form == undefined) ? "abc" : form
18    switch (f) {
19        case "abc":
20            return 41
21        case "xyz":
22            return 42
23        default:
24            return 0
25    }
26}
27
28class A{}
29
30function main(): void {
31    assert foo() == 41: "Error! foo() must be equal 41";
32    assert foo("xyz") == 42: "Error! foo(\"xyz\") must be equal 42";
33    assert foo("NFD") == 0: "Error! foo(\"NFD\") must be equal 0";
34    let x = foo() == 41 ? new A() : undefined;
35    assert x instanceof A;
36    let y = foo("wxyz") == 42 ? "TRUE" : new A();
37    assert y instanceof A;
38    y = "JK";
39    assert y == "JK";
40}
41