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// |reftest| shell-option(--enable-upsert) skip-if(!WeakMap.prototype.getOrInsert)
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// Copyright (C) 2025 Jonas Haukenes. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: proposal-upsert
description: >
Throws TypeError if `this` doesn't have a [[WeakMapData]] internal slot.
info: |
WeakMap.prototype.getOrInsert ( key, value )
...
1. Let M be the this value.
2. Perform ? RequireInternalSlot(M, [[WeakMapData]]).
...
---*/
assertThrowsInstanceOf(function() {
WeakMap.prototype.getOrInsert.call([], {}, 1);
}, TypeError);
assertThrowsInstanceOf(function() {
var map = new WeakMap();
map.getOrInsert.call([], {}, 1);
}, TypeError);
reportCompare(0, 0);