tor-browser

The Tor Browser
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value-bigint-tojson-receiver.js (820B)

      1 // Copyright 2019 Igalia, S.L. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 // Test case written by André Bargull.
      4 
      5 /*---
      6 esid: sec-serializejsonproperty
      7 description: toJSON method called with BigInt as receiver
      8 features: [BigInt]
      9 ---*/
     10 
     11 assert.throws(TypeError, () => JSON.stringify(1n),
     12              "toString throws for BigInt object");
     13 
     14 // The BigInt proposal changes the SerializeJSONProperty algorithm to
     15 // specifically allow passing BigInt objects as receivers for the toJSON
     16 // method.
     17 Object.defineProperty(BigInt.prototype, "toJSON", {
     18    get() {
     19        "use strict";
     20        return () => typeof this;
     21    }
     22 });
     23 
     24 assert.sameValue(JSON.stringify(1n), "\"bigint\"",
     25                 "BigInt toJSON method called with value as receiver");
     26 
     27 reportCompare(0, 0);