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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
1.1 KiB
JavaScript
51 lines
1.1 KiB
JavaScript
// Copyright (C) 2019 Leo Balter. 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-weak-ref-target
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description: >
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Throws a TypeError if target cannot be held weakly
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info: |
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WeakRef ( _target_ )
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2. If CanBeHeldWeakly(_target_) is *false*, throw a *TypeError* exception.
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features: [WeakRef]
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---*/
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assert.sameValue(
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typeof WeakRef, 'function',
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'typeof WeakRef is function'
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);
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assert.throws(TypeError, function() {
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new WeakRef();
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}, 'implicit undefined');
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assert.throws(TypeError, function() {
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new WeakRef(undefined);
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}, 'explicit undefined');
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assert.throws(TypeError, function() {
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new WeakRef(null);
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}, 'null');
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assert.throws(TypeError, function() {
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new WeakRef(1);
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}, 'number');
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assert.throws(TypeError, function() {
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new WeakRef('Object');
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}, 'string');
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var s = Symbol.for('registered symbol');
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assert.throws(TypeError, function() {
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new WeakRef(s);
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}, 'registered symbol');
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assert.throws(TypeError, function() {
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new WeakRef(true);
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}, 'Boolean, true');
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assert.throws(TypeError, function() {
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new WeakRef(false);
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}, 'Boolean, false');
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