1/* 2 * Copyright (c) 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 InterfaceA { 17 propA: string 18} 19interface InterfaceAA extends InterfaceA {} 20 21interface InterfaceB { 22 propB: number; 23} 24interface ParentInterface extends InterfaceA, InterfaceB {} 25interface ChildInterface extends ParentInterface {} 26 27function main() { 28 const obj: ChildInterface = { 29 propA: "Hello", 30 propB: 42 31 } 32 assertEQ(obj.propA, "Hello") 33 assertEQ(obj.propB, 42) 34}