1// Copyright JS Foundation and other contributors, http://js.foundation 2// 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 15function Function_A() { } 16function Function_B() { } 17Function_B.prototype = new Function_A(); 18 19function Function_C() { } 20Function_C.prototype = new Function_B(); 21 22function Function_D() { } 23Function_D.prototype = new Function_C(); 24 25var d_instance = new Function_D(); 26 27assert (Function_A.prototype.isPrototypeOf (d_instance) === true) 28assert (Function_A.prototype.isPrototypeOf (Array) === false) 29 30 31assert (Function_A.prototype.isPrototypeOf.call(0, 0) === false); 32assert (Function_A.prototype.isPrototypeOf.call(Function_A, 0) === false); 33 34assert (Function.prototype.isPrototypeOf (Object) === true) 35