setelem-one-past-nonwritable-length.js (428B)
1 function f(arr, i, v) 2 { 3 arr[i] = v; 4 } 5 6 function test() 7 { 8 // Use a much-greater capacity than the eventual non-writable length. 9 var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]; 10 Object.defineProperty(a, "length", { writable: false, value: 6 }); 11 12 for (var i = 0; i < 100; i++) 13 f(a, a.length, i); 14 15 assertEq(a.hasOwnProperty(6), false); 16 assertEq(a[6], undefined); 17 assertEq(a.length, 6); 18 } 19 20 test();