diff --git a/test/built-ins/JSON/stringify/bigint-tojson-receiver.js b/test/built-ins/JSON/stringify/bigint-tojson-receiver.js new file mode 100644 index 0000000000..5e23f8198e --- /dev/null +++ b/test/built-ins/JSON/stringify/bigint-tojson-receiver.js @@ -0,0 +1,25 @@ +// Copyright 2019 Igalia, S.L. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +// Test case written by André Bargull. + +/*--- +esid: sec-serializejsonproperty +description: toJSON method called with BigInt as receiver +features: [BigInt] +---*/ + +assert.throws(TypeError, () => JSON.stringify(1n), + "toString throws for BigInt object"); + +// The BigInt proposal changes the SerializeJSONProperty algorithm to +// specifically allow passing BigInt objects as receivers for the toJSON +// method. +Object.defineProperty(BigInt.prototype, "toJSON", { + get() { + "use strict"; + return () => typeof this; + } +}); + +assert.sameValue(JSON.stringify(1n), "\"bigint\"", + "BigInt toJSON method called with value as receiver");