JSTests/stress/double-array-to-array-storage.js

"use strict";

function assert(b, msg) {
    if (!b)
        throw new Error(msg);
}

var arr = [];

function test()
{
    arr = [0, 2147483648]; // NOTE: the second number is greater than INT_MAX

    assert(arr[0] === 0, "arr[0] should be 0, but is " + arr[0]);
    assert(arr[1] === 2147483648, "arr[1] should be 2147483648, but is " + arr[1]);
    assert(arr.length === 2, "Length should be 2, but is " + arr.length);

    arr.shift();

    assert(arr[0] === 2147483648, "arr[0] should be 2147483648, but is " + arr[0]);
    assert(arr[1] === undefined, "arr[1] should be undefined, but is " + arr[1]);
    assert(arr.length === 1, "Length should be 2, but is " + arr.length);

    arr[1] = 1;

    assert(arr[0] === 2147483648, "arr[0] should be 2147483648, but is " + arr[0]);
    assert(arr[1] === 1, "arr[1] should be 1, but is " + arr[1]);
    assert(arr.length === 2, "Length should be 2, but is " + arr.length);
}

for (let i = 0; i < 10000; i++)
    test();