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 15var array = ["foo", [], Infinity, 4] 16var new_arr = array.concat(); 17 18assert(new_arr.length === array.length) 19for (i = 0; i < array.length; i++) { 20 assert(array[i] === new_arr[i]); 21} 22 23var obj = { concat : Array.prototype.concat }; 24var arr1 = ["Apple", 6, "Peach"]; 25var arr2 = [obj, "Cherry", "Grape"]; 26 27var new_array = obj.concat(arr1); 28assert(new_array.length === 4); 29assert(new_array[0] === obj); 30assert(new_array[1] === "Apple"); 31assert(new_array[2] === 6); 32assert(new_array[3] === "Peach"); 33 34var new_array = arr1.concat(arr2, obj, 1); 35 36assert(new_array.length === 8); 37assert(new_array[0] === "Apple"); 38assert(new_array[1] === 6); 39assert(new_array[2] === "Peach"); 40assert(new_array[3] === obj); 41assert(new_array[4] === "Cherry"); 42assert(new_array[5] === "Grape"); 43assert(new_array[6] === obj); 44assert(new_array[7] === 1); 45 46var arr1 = [1,2]; 47var arr2 = [4,5,6,7,8]; 48var arr3 = [,,9,10]; 49var arr4 = []; 50var expected = [1,2,4,5,6,7,8,,,9,10]; 51 52var result = arr1.concat(arr2, arr3, arr4); 53 54assert(result.length === expected.length) 55for (i = 0; i < result.length; i++) { 56 assert(result[i] === expected[i]); 57} 58 59var arr1 = []; 60arr1.length = 2; 61var arr2 = []; 62arr2.length = 3; 63assert(arr1.concat(arr2).length === arr1.length + arr2.length); 64 65// Checking behavior when unable to get element 66var arr = [] 67Object.defineProperty(arr, '0', { 'get' : function () {throw new ReferenceError ("foo"); } }); 68arr.length = 1; 69 70try { 71 arr.concat(); 72 assert(false); 73} catch (e) { 74 assert(e.message === "foo"); 75 assert(e instanceof ReferenceError); 76} 77 78/* ES v5.1 15.4.4.4.5. 79 Checking behavior when unable to get element from a given array */ 80arr1 = []; 81arr2 = []; 82arr3 = []; 83Object.defineProperty(arr2, '0', { 'get' : function () {throw new ReferenceError ("foo"); } }); 84 85try { 86 arr1.concat(arr2, arr3); 87 assert(false); 88} catch (e) { 89 assert(e instanceof ReferenceError); 90} 91