1425bb815Sopenharmony_ci// Copyright JS Foundation and other contributors, http://js.foundation 2425bb815Sopenharmony_ci// 3425bb815Sopenharmony_ci// Licensed under the Apache License, Version 2.0 (the "License"); 4425bb815Sopenharmony_ci// you may not use this file except in compliance with the License. 5425bb815Sopenharmony_ci// You may obtain a copy of the License at 6425bb815Sopenharmony_ci// 7425bb815Sopenharmony_ci// http://www.apache.org/licenses/LICENSE-2.0 8425bb815Sopenharmony_ci// 9425bb815Sopenharmony_ci// Unless required by applicable law or agreed to in writing, software 10425bb815Sopenharmony_ci// distributed under the License is distributed on an "AS IS" BASIS 11425bb815Sopenharmony_ci// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12425bb815Sopenharmony_ci// See the License for the specific language governing permissions and 13425bb815Sopenharmony_ci// limitations under the License. 14425bb815Sopenharmony_ci 15425bb815Sopenharmony_civar arrayPrototypeValues = Array.prototype.values; 16425bb815Sopenharmony_ci 17425bb815Sopenharmony_cifunction f_mapped() { 18425bb815Sopenharmony_ci assert(typeof arguments[Symbol.iterator] === 'function'); 19425bb815Sopenharmony_ci assert(arguments[Symbol.iterator] === arrayPrototypeValues); 20425bb815Sopenharmony_ci assert(Object.hasOwnProperty.call(arguments, Symbol.iterator)); 21425bb815Sopenharmony_ci 22425bb815Sopenharmony_ci let sum = 0; 23425bb815Sopenharmony_ci for (a of arguments) { 24425bb815Sopenharmony_ci sum += a; 25425bb815Sopenharmony_ci } 26425bb815Sopenharmony_ci return sum; 27425bb815Sopenharmony_ci}; 28425bb815Sopenharmony_ci 29425bb815Sopenharmony_cifunction f_unmapped(b = 2) { 30425bb815Sopenharmony_ci assert(typeof arguments[Symbol.iterator] === 'function'); 31425bb815Sopenharmony_ci assert(arguments[Symbol.iterator] === arrayPrototypeValues); 32425bb815Sopenharmony_ci assert(Object.hasOwnProperty.call(arguments, Symbol.iterator)); 33425bb815Sopenharmony_ci 34425bb815Sopenharmony_ci let sum = 0; 35425bb815Sopenharmony_ci for (a of arguments) { 36425bb815Sopenharmony_ci sum += a; 37425bb815Sopenharmony_ci } 38425bb815Sopenharmony_ci return sum; 39425bb815Sopenharmony_ci}; 40425bb815Sopenharmony_ci 41425bb815Sopenharmony_ciassert(f_mapped(1, 2, 3, 4, 5) === 15); 42425bb815Sopenharmony_ciassert(f_unmapped(1, 2, 3, 4, 5) === 15); 43425bb815Sopenharmony_ci 44425bb815Sopenharmony_ciObject.defineProperty(Array.prototype, "values", { get : function () { 45425bb815Sopenharmony_ci /* should not be executed */ 46425bb815Sopenharmony_ci assert(false); 47425bb815Sopenharmony_ci}}); 48425bb815Sopenharmony_ci 49425bb815Sopenharmony_ciassert(f_mapped(1, 2, 3, 4, 5) === 15); 50425bb815Sopenharmony_ciassert(f_unmapped(1, 2, 3, 4, 5) === 15); 51