1/* 2 * Copyright (c) 2023 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 16import assert = require('assert'); 17 18class Animal { 19 name: string; 20 21 constructor(theName: string) { 22 this.name = theName; 23 } 24 25 move(distanceInMeters: number = 0, mode: string): string { 26 return `${this.name} ${mode} ${distanceInMeters}m.`; 27 } 28} 29 30class Dog extends Animal { 31 constructor(name: string) { 32 super(name); 33 } 34 35 move(distanceInMeters = 5, mode: string): string { 36 console.log('Slithering...'); 37 return super.move(distanceInMeters, mode); 38 } 39 40 bark(): string { 41 return 'Woof! Woof!'; 42 } 43} 44 45const dog = new Dog('dog'); 46 47assert(dog.bark() === 'Woof! Woof!', 'success'); 48 49assert(dog.move(10, 'run') === 'dog run 10m.', 'success'); 50