src/third_party/mozjs-45/js/src/jit-test/tests/basic/testGrowDenseArray.js

function testGrowDenseArray() {
    var a = new Array();
    for (var i = 0; i < 10; ++i)
        a[i] |= 5;
    return a.join(",");
}
assertEq(testGrowDenseArray(), "5,5,5,5,5,5,5,5,5,5");