1/** 2 * Copyright (c) 2024-2025 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 16interface I { 17 i: number; 18} 19 20interface I2 extends I { 21 j: string; 22} 23 24function main(){ 25 let f: Partial<I2> = {} 26 assertEQ(f.i, undefined) 27 assertEQ(f.j, undefined) 28 29 let f2: Partial<I2> = {i:10,j :"some str" } 30 assertEQ(f2.i, 10) 31 assertEQ(f2.j, "some str") 32} 33