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 C  {
17  bar(): string {
18    return "Class C";
19  }
20}
21
22function foo(c: Object|null|undefined): string {
23  if (c instanceof string)  {
24    assert(c.length == 11);
25    c = "Case 1";
26  } else if (c instanceof C) {
27    assert(c.bar() == "Class C")
28    c = "Case 2";
29  } else if (c instanceof Int) {
30    assert(c * 7 == 49);
31    c = "Case 3";
32  } else if (c instanceof null) {
33    assert(c == null);
34    c = "Case 4";
35  } else {
36    c = "Case 5";
37  }
38
39  assert(c.length == 6);
40  return c;
41}
42
43
44function main(): void {
45  assert(foo("Test string") == "Case 1");
46  assert(foo(new Int(7)) == "Case 3");
47  assert(foo(new C()) == "Case 2");
48  assert(foo(null) == "Case 4");
49  assert(foo(undefined) == "Case 5");
50  assert(foo(new Number(3.0)) == "Case 5");
51}
52