ion-pop-denseinitializedlength-less-than-length.js

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load(libdir + "asserts.js");

function f(arr)

  arr.pop();

var N = 100;

function test()

  // Create an array of arrays, to be iterated over for [].pop-calling.  We

  // can't just loop on pop on a single array with non-writable length because

  // pop throws when called on an array with non-writable length.

  var arrs = [];

  for (var i = 0; i < N; i++)

    arrs.push([0, 1, 2, 3]);

  // Test Ion-pop where dense initialized length < length.

  var a = [0, 1, 2];

  a.length = 4;

  arrs.push(a);

  for (var i = 0, sz = arrs.length; i < sz; i++)

    f(arrs[i]);

  return arrs;

var arrs = test();

assertEq(arrs.length, N + 1);

for (var i = 0; i < N; i++)

  assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]");

  assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]");

  assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]");

  assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]");

  assertEq(3 in arrs[i], false, "shouldn't be a third element");

  assertEq(arrs[i][3], undefined);

var a = arrs[N];

assertEq(a.length, 3, "unexpected length for arrs[" + i + "]");

assertEq(a[0], 0, "bad element for arrs[" + i + "][0]");

assertEq(a[1], 1, "bad element for arrs[" + i + "][1]");

assertEq(a[2], 2, "bad element for arrs[" + i + "][2]");

assertEq(3 in a, false, "shouldn't be a third element");

assertEq(a[3], undefined);