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 16/* 17 * @tc.name:async 18 * @tc.desc:test async function 19 * @tc.type: FUNC 20 * @tc.require: issueI5NO8G issueI8FBM3 21 */ 22const input = [1, [2], [[3]]]; 23print(input.flat(undefined)); 24 25{ 26 class MyArray extends Array { 27 static get [Symbol.species]() { 28 return this; 29 } 30 } 31 const wannabe = new MyArray(); 32 const flattened = wannabe.flat(Infinity); 33 print(flattened instanceof MyArray); 34}