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6291e42a72
WeakMap, WeakSet, WeakRef, and FinalizationRegistry all had tests verifying what would happen if they were called with a value that wasn't allowed as a weak value: before this proposal, that was a non-Object. Now, allowed weak values are Objects, well-known Symbols, and unregistered Symbols. That leaves registered Symbols that are still not allowed as weak values. This commit updates those tests to use a registered Symbol instead of an unregistered Symbol; they should still pass, regardless of whether the implementation has implemented symbols-as-weakmap-keys yet. The tests are renamed as appropriate. Also updates the frontmatter to the most current spec text, including the CanBeHeldWeakly abstract operation. See: #2850
51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
// Copyright (C) 2015 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-weakmap-iterable
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description: >
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Throws a TypeError if keys in iterable items cannot be held weakly.
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info: |
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WeakMap ( [ _iterable_ ] )
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5. Let _adder_ be ? Get(_map_, *"set"*).
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6. Return ? AddEntriesFromIterable(_map_, _iterable_, _adder_).
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AddEntriesFromIterable:
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3. Repeat,
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i. Let _status_ be Completion(Call(_adder_, _target_, « _k_, _v_ »)).
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j. IfAbruptCloseIterator(_status_, _iteratorRecord_).
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WeakMap.prototype.set( _key_, _value_ ):
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4. If CanBeHeldWeakly(_key_) is *false*, throw a *TypeError* exception.
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features: [Symbol, WeakMap]
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---*/
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assert.throws(TypeError, function() {
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new WeakMap([1, 1]);
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});
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assert.throws(TypeError, function() {
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new WeakMap(['', 1]);
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});
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assert.throws(TypeError, function() {
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new WeakMap([true, 1]);
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});
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assert.throws(TypeError, function() {
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new WeakMap([null, 1]);
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});
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assert.throws(TypeError, function() {
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new WeakMap([Symbol.for('registered symbol'), 1]);
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}, 'Registered symbol not allowed as a WeakMap key');
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assert.throws(TypeError, function() {
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new WeakMap([undefined, 1]);
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});
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assert.throws(TypeError, function() {
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new WeakMap([
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['a', 1], 2
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]);
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});
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