1/* 2 * Copyright (c) 2025 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 A { 17 public on(event: String, callback: Object): string { 18 return event; 19 } 20} 21 22function main() { 23 let temp: A = new A(); 24 let s1 = temp.on("hello1", () => { }); 25 let s2 = temp.on("hello2", (args?: Array<Object>) => { }); 26 let s3 = temp.on("hello3", (args?: Array<Object>): Int => { return 1; }); 27 assertEQ(s1, "hello1"); 28 assertEQ(s2, "hello2"); 29 assertEQ(s3, "hello3"); 30} 31