// Copyright (C) 2019 Leo Balter. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-finalization-registry.prototype.register
description: Throws a TypeError if this does not have a [[Cells]] internal slot
info: |
FinalizationRegistry.prototype.register ( target , holdings [, unregisterToken ] )
1. Let finalizationRegistry be the this value.
2. If Type(finalizationRegistry) is not Object, throw a TypeError exception.
3. If Type(target) is not Object, throw a TypeError exception.
4. If finalizationRegistry does not have a [[Cells]] internal slot, throw a TypeError exception.
...
features: [WeakSet, WeakMap, FinalizationRegistry, WeakRef]
---*/
assert.sameValue(typeof FinalizationRegistry.prototype.register, 'function');
var register = FinalizationRegistry.prototype.register;
var target = {};
assert.throws(TypeError, function() {
register.call({ ['[[Cells]]']: {} }, target);
}, 'Ordinary object without [[Cells]]');
assert.throws(TypeError, function() {
register.call(WeakRef.prototype, target);
}, 'WeakRef.prototype does not have a [[Cells]] internal slot');
assert.throws(TypeError, function() {
register.call(WeakRef, target);
}, 'WeakRef does not have a [[Cells]] internal slot');
var wr = new WeakRef({});
assert.throws(TypeError, function() {
register.call(wr, target);
}, 'WeakRef instance');
var wm = new WeakMap();
assert.throws(TypeError, function() {
register.call(wm, target);
}, 'WeakMap instance');
var ws = new WeakSet();
assert.throws(TypeError, function() {
register.call(ws, target);
}, 'WeakSet instance');