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 18interface SquareConfig { 19 color?: string; 20 width?: number; 21 22 [propName: string]: any; 23} 24 25function createSquare(config: SquareConfig): { color: string; area: number } { 26 let newSquare = {color: 'white', area: 100}; 27 if (config.colr) { 28 newSquare.color = config.colr; 29 } 30 if (config.width) { 31 newSquare.area = config.width * config.width; 32 } 33 return newSquare; 34} 35 36let mySquare = createSquare({colr: 'red', width: 100}); 37 38assert(mySquare.color === 'red', 'success'); 39assert(mySquare.area === 10000, 'success');