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// |reftest| skip -- set-methods is not supported
// Copyright (C) 2023 Anthony Frehner and Kevin Gibbons. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-set.prototype.issubsetof
description: Set.prototype.isSubsetOf throws when receiver is not a Set
features: [set-methods]
---*/
class MySetLike {
constructor() {
this.size = 2;
this.has = () => {};
this.keys = function* keys() {
yield 2;
yield 3;
};
}
}
const s1 = new MySetLike();
const s2 = new Set();
assert.throws(
TypeError,
() => {
Set.prototype.isSubsetOf.call(s1, s2);
},
"Set-like class"
);
const s3 = {
size: 2,
has: () => {},
keys: function* keys() {
yield 2;
yield 3;
},
};
assert.throws(
TypeError,
() => {
Set.prototype.isSubsetOf.call(s3, s2);
},
"Set-like object"
);
reportCompare(0, 0);
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