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?:int; 18 j?:string; 19} 20 21function main(){ 22 let partial1:Partial<I> = {i:1234,j:"abcd"}; 23 assertEQ(partial1.i, 1234) 24 assertEQ(partial1.j, "abcd") 25 assertTrue(!(partial1 instanceof I)) 26 27 let partial2:Partial<I> = {i:1234}; 28 assertEQ(partial2.i, 1234) 29 assertEQ(partial2.j, undefined) 30 assertTrue(!(partial2 instanceof I)) 31 32 let partial3:Partial<I> = {}; 33 assertEQ(partial3.i, undefined) 34 assertEQ(partial3.j, undefined) 35 assertTrue(!(partial3 instanceof I)) 36} 37