JSTests/stress/internal-function-construct.js

function shouldBe(actual, expected) {
    if (actual !== expected)
        throw new Error('bad value: ' + actual);
}

var func = Date;

for (var i = 0; i < 1e4; ++i) {
    var date = new func();
    shouldBe(typeof date, "object");
    shouldBe(date instanceof Date, true);
}