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 15// check properties 16 17function length_configurable() 18{ 19 function is_es51() { 20 return (typeof g === "function"); 21 { function g() {} } 22 } 23 return is_es51() ? false : true; 24} 25 26assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').configurable === length_configurable()); 27 28assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').enumerable === false); 29 30assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').writable === false); 31 32// simple checks 33var s1 = "Hello "; 34var s2 = "world!"; 35var s3 = " "; 36assert(s1.concat(s2, s3, 3, 10, " ", ".") === "Hello world! 310 ."); 37assert("Hello ".concat(s1) === "Hello Hello "); 38 39assert(s1.concat(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9) === "Hello 012345678901234567890123456789"); 40 41assert("".concat() === ""); 42 43// check unicode 44assert("\u0041".concat("\u0041", "\u1041") === "\u0041\u0041\u1041"); 45assert("\u0041\u1D306A".concat("\u0041", "\u1041") === "\u0041\u1D306A\u0041\u1041"); 46 47// check undefined 48var y; 49assert("Check ".concat(y) === "Check undefined"); 50 51// check toString error in this object 52var y = {}; 53y.toString = function () { throw new ReferenceError ("foo");} 54y.concat = String.prototype.concat; 55try { 56 y.concat("cat"); 57 assert(false); 58} catch (e) { 59 assert(e instanceof ReferenceError); 60} 61 62// check toString error in arguments 63var x = {}; 64x.toString = function () { throw new ReferenceError ("foo");} 65try { 66 "a".concat(x); 67 assert(false); 68} catch (e) { 69 assert(e instanceof ReferenceError); 70} 71