tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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iterator-method-emulates-undefined.js (834B)

      1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-array.from
      5 description: >
      6  [[IsHTMLDDA]] object as @@iterator method gets called.
      7 info: |
      8  Array.from ( items [ , mapfn [ , thisArg ] ] )
      9 
     10  [...]
     11  4. Let usingIterator be ? GetMethod(items, @@iterator).
     12  5. If usingIterator is not undefined, then
     13    [...]
     14    c. Let iteratorRecord be ? GetIterator(items, sync, usingIterator).
     15 
     16  GetIterator ( obj [ , hint [ , method ] ] )
     17 
     18  [...]
     19  4. Let iterator be ? Call(method, obj).
     20  5. If Type(iterator) is not Object, throw a TypeError exception.
     21 features: [Symbol.iterator, IsHTMLDDA]
     22 ---*/
     23 
     24 var items = {};
     25 items[Symbol.iterator] = $262.IsHTMLDDA;
     26 
     27 assert.throws(TypeError, function() {
     28  Array.from(items);
     29 });
     30 
     31 reportCompare(0, 0);