/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * @tc.name:async
 * @tc.desc:test async function
 * @tc.type: FUNC
 * @tc.require: issueI5NO8G issueI8FBM3
 */
const input = [1, [2], [[3]]];
print(input.flat(undefined));

{
    class MyArray extends Array {
        static get [Symbol.species]() {
            return this;
        }
    }
    const wannabe = new MyArray();
    const flattened = wannabe.flat(Infinity);
    print(flattened instanceof MyArray);
}