1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
import { throws } from "assert";import { encode, decode, DecodeError } from "@msgpack/msgpack";
describe("prototype pollution", () => {  context("__proto__ exists as a map key", () => {    it("raises DecodeError in decoding", () => {      const o = {        foo: "bar",      };      // override __proto__ as an enumerable property      Object.defineProperty(o, "__proto__", {        value: new Date(0),        enumerable: true,      });      const encoded = encode(o);
      throws(() => {        decode(encoded);      }, DecodeError);    });  });});