function shouldBe(actual, expected) { if (actual !== expected) throw new Error('bad value: ' + actual); } function test() { for (var i = 0; i < 10; ++i) { var result = ''; result += i.toString(2); result += i.toString(4); result += i.toString(8); result += i.toString(16); result += i.toString(32); } return result; } noInline(test); var result = `1001211199`; for (var i = 0; i < 1e4; ++i) { if (i === 1e3) { Number.prototype.toString = function (radix) { return "Hello"; } result = `HelloHelloHelloHelloHello`; } shouldBe(test(), result); }