iterable-with-object-keys.js (1579B)
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 Returns the new WeakMap adding entries from the iterable parameter, with 7 Object keys. 8 info: | 9 WeakMap ( [ _iterable_ ] ) 10 5. Let _adder_ be ? Get(_map_, *"set"*). 11 6. Return ? AddEntriesFromIterable(_map_, _iterable_, _adder_). 12 13 AddEntriesFromIterable: 14 3. Repeat, 15 i. Let _status_ be Completion(Call(_adder_, _target_, « _k_, _v_ »)). 16 17 WeakMap.prototype.set( _key_, _value_ ): 18 6. Let _p_ be the Record {[[Key]]: _key_, [[Value]]: _value_}. 19 7. Append _p_ as the last element of _entries_. 20 features: [WeakMap] 21 ---*/ 22 23 var first = {}; 24 var second = {}; 25 var results = []; 26 var set = WeakMap.prototype.set; 27 WeakMap.prototype.set = function(key, value) { 28 results.push({ 29 _this: this, 30 key: key, 31 value: value 32 }); 33 return set.call(this, key, value); 34 }; 35 var map = new WeakMap([ 36 [first, 42], 37 [second, 43] 38 ]); 39 40 assert.sameValue(results.length, 2, 'Called WeakMap#set for each object'); 41 assert.sameValue(results[0].key, first, 'Adds object in order - first key'); 42 assert.sameValue(results[0].value, 42, 'Adds object in order - first value'); 43 assert.sameValue(results[0]._this, map, 'Adds object in order - this'); 44 assert.sameValue(results[1].key, second, 'Adds object in order - second key'); 45 assert.sameValue(results[1].value, 43, 'Adds object in order - second value'); 46 assert.sameValue(results[1]._this, map, 'Adds object in order - this'); 47 48 reportCompare(0, 0);