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var isPacked = getSelfHostedValue("IsPackedArray");
function test() {
var arr;
// basic
arr = [];
assertEq(isPacked(arr), true);
arr[0] = 0;
assertEq(isPacked(arr), true);
arr[2] = 2;
assertEq(isPacked(arr), false);
// delete
arr = [1, 2, 3];
assertEq(isPacked(arr), true);
delete arr[1];
assertEq(isPacked(arr), false);
// setting .length
arr = [1];
arr.length = 0;
assertEq(isPacked(arr), true);
arr.length = 1;
assertEq(isPacked(arr), false);
// slice
arr = [1, 2, , 3];
assertEq(isPacked(arr), false);
assertEq(isPacked(arr.slice(0, 2)), true);
assertEq(isPacked(arr.slice(0, 3)), false);
assertEq(isPacked(arr.slice(2, 3)), false);
assertEq(isPacked(arr.slice(3, 4)), true);
// splice
arr = [1, 2, 3];
assertEq(isPacked(arr.splice(0)), true);
arr = [1, , 2];
assertEq(isPacked(arr.splice(0)), false);
arr = [1, , 2];
assertEq(isPacked(arr.splice(0, 1)), true);
assertEq(arr.length, 2);
assertEq(isPacked(arr.splice(0, 1)), false);
assertEq(arr.length, 1);
assertEq(isPacked(arr.splice(0, 1)), true);
assertEq(arr.length, 0);
assertEq(isPacked(arr.splice(0)), true);
}
for (var i = 0; i < 5; i++) {
test();
}
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