tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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map-iterable-empty-does-not-call-set.js (777B)

      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-map-iterable
      5 description: >
      6  A Map constructed with an empty iterable argument does not call set.
      7 info: |
      8  Map ( [ iterable ] )
      9 
     10  When the Map function is called with optional argument the following steps are
     11  taken:
     12 
     13  ...
     14  8. If iter is undefined, return map.
     15  9. Repeat
     16    a. Let next be IteratorStep(iter).
     17    b. ReturnIfAbrupt(next).
     18    c. If next is false, return map.
     19 ---*/
     20 
     21 var set = Map.prototype.set;
     22 var counter = 0;
     23 
     24 Map.prototype.set = function(value) {
     25  counter++;
     26  set.call(this, value);
     27 };
     28 
     29 new Map([]);
     30 
     31 assert.sameValue(counter, 0, '`Map.prototype.set` was not called.');
     32 
     33 reportCompare(0, 0);