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|
// |reftest| skip -- set-methods is not supported
// Copyright (C) 2023 Anthony Frehner. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-getsetrecord
description: GetSetRecord throws an exception if the Set-like object has a size that is coerced to NaN
info: |
2. Let rawSize be ? Get(obj, "size").
3. Let numSize be ? ToNumber(rawSize).
4. NOTE: If rawSize is undefined, then numSize will be NaN.
5. If numSize is NaN, throw a TypeError exception.
features: [set-methods]
---*/
const s1 = new Set([1, 2]);
const s2 = {
size: undefined,
has: () => {},
keys: function* keys() {
yield 2;
yield 3;
},
};
assert.throws(
TypeError,
function () {
s1.union(s2);
},
"GetSetRecord throws an error when size is undefined"
);
s2.size = NaN;
assert.throws(
TypeError,
function () {
s1.union(s2);
},
"GetSetRecord throws an error when size is NaN"
);
let coercionCalls = 0;
s2.size = {
valueOf: function() {
++coercionCalls;
return NaN;
},
};
assert.throws(
TypeError,
function () {
s1.union(s2);
},
"GetSetRecord throws an error when size coerces to NaN"
);
assert.sameValue(coercionCalls, 1, "GetSetRecord coerces size");
s2.size = 0n;
assert.throws(
TypeError,
function () {
s1.union(s2);
},
"GetSetRecord throws an error when size is a BigInt"
);
s2.size = "string";
assert.throws(
TypeError,
function () {
s1.union(s2);
},
"GetSetRecord throws an error when size is a non-numeric string"
);
reportCompare(0, 0);
|
