tor-browser

The Tor Browser
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iterator-items-keys-cannot-be-held-weakly.js (1322B)

      1 // Copyright (C) 2015 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-weakmap-iterable
      5 description: >
      6  Throws a TypeError if keys in iterable items cannot be held weakly.
      7 info: |
      8  WeakMap ( [ _iterable_ ] )
      9  5. Let _adder_ be ? Get(_map_, *"set"*).
     10  6. Return ? AddEntriesFromIterable(_map_, _iterable_, _adder_).
     11 
     12  AddEntriesFromIterable:
     13  3. Repeat,
     14    i. Let _status_ be Completion(Call(_adder_, _target_, « _k_, _v_ »)).
     15    j. IfAbruptCloseIterator(_status_, _iteratorRecord_).
     16 
     17  WeakMap.prototype.set( _key_, _value_ ):
     18  4. If CanBeHeldWeakly(_key_) is *false*, throw a *TypeError* exception.
     19 features: [Symbol, WeakMap]
     20 ---*/
     21 
     22 assert.throws(TypeError, function() {
     23  new WeakMap([1, 1]);
     24 });
     25 
     26 assert.throws(TypeError, function() {
     27  new WeakMap(['', 1]);
     28 });
     29 
     30 assert.throws(TypeError, function() {
     31  new WeakMap([true, 1]);
     32 });
     33 
     34 assert.throws(TypeError, function() {
     35  new WeakMap([null, 1]);
     36 });
     37 
     38 assert.throws(TypeError, function() {
     39  new WeakMap([Symbol.for('registered symbol'), 1]);
     40 }, 'Registered symbol not allowed as a WeakMap key');
     41 
     42 assert.throws(TypeError, function() {
     43  new WeakMap([undefined, 1]);
     44 });
     45 
     46 assert.throws(TypeError, function() {
     47  new WeakMap([
     48    ['a', 1], 2
     49  ]);
     50 });
     51 
     52 reportCompare(0, 0);