ion-pop-denseinitializedlength-less-than-length.js (1377B)
1 load(libdir + "asserts.js"); 2 3 function f(arr) 4 { 5 arr.pop(); 6 } 7 8 var N = 100; 9 10 function test() 11 { 12 // Create an array of arrays, to be iterated over for [].pop-calling. We 13 // can't just loop on pop on a single array with non-writable length because 14 // pop throws when called on an array with non-writable length. 15 var arrs = []; 16 for (var i = 0; i < N; i++) 17 arrs.push([0, 1, 2, 3]); 18 19 // Test Ion-pop where dense initialized length < length. 20 var a = [0, 1, 2]; 21 a.length = 4; 22 23 arrs.push(a); 24 25 for (var i = 0, sz = arrs.length; i < sz; i++) 26 f(arrs[i]); 27 28 return arrs; 29 } 30 31 var arrs = test(); 32 assertEq(arrs.length, N + 1); 33 for (var i = 0; i < N; i++) 34 { 35 assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]"); 36 assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]"); 37 assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]"); 38 assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]"); 39 assertEq(3 in arrs[i], false, "shouldn't be a third element"); 40 assertEq(arrs[i][3], undefined); 41 } 42 43 var a = arrs[N]; 44 assertEq(a.length, 3, "unexpected length for arrs[" + i + "]"); 45 assertEq(a[0], 0, "bad element for arrs[" + i + "][0]"); 46 assertEq(a[1], 1, "bad element for arrs[" + i + "][1]"); 47 assertEq(a[2], 2, "bad element for arrs[" + i + "][2]"); 48 assertEq(3 in a, false, "shouldn't be a third element"); 49 assertEq(a[3], undefined);