tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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arguments-list-is-not-array-like-but-still-valid.js (1838B)

      1 // Copyright (C) 2015 the V8 project authors. All rights reserved.
      2 // Copyright (C) 2020 Rick Waldron. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 esid: sec-reflect.apply
      6 description: >
      7  Return abrupt if argumentsList is not an ArrayLike object.
      8 info: |
      9  Reflect.apply ( target, thisArgument, argumentsList )
     10 
     11  ...
     12  Let args be ? CreateListFromArrayLike(argumentsList).
     13 
     14 
     15  CreateListFromArrayLike (obj [, elementTypes] )
     16 
     17  ...
     18  If Type(obj) is not Object, throw a TypeError exception.
     19  Let len be ? LengthOfArrayLike(obj).
     20  Let list be a new empty List.
     21  Let index be 0.
     22  Repeat, while index < len,
     23    Let indexName be ! ToString(index).
     24    Let next be ? Get(obj, indexName).
     25    If Type(next) is not an element of elementTypes, throw a TypeError exception.
     26    Append next as the last element of list.
     27    Set index to index + 1.
     28  Return list.
     29 includes: [compareArray.js]
     30 features: [Reflect, arrow-function, Symbol]
     31 ---*/
     32 
     33 let count = 0;
     34 
     35 function fn(...args) {
     36  count++;
     37  return args;
     38 }
     39 
     40 let f_unction = new Function();
     41 
     42 Object.defineProperty(f_unction, "length", {
     43  get() {
     44    return 1;
     45  }
     46 });
     47 
     48 assert.compareArray(Reflect.apply(fn, null, f_unction), [undefined]);
     49 
     50 let object = new Object();
     51 
     52 Object.defineProperty(object, "length", {
     53  get() {
     54    return 1;
     55  }
     56 });
     57 
     58 assert.compareArray(Reflect.apply(fn, null, object), [undefined]);
     59 
     60 let number = new Number();
     61 
     62 Object.defineProperty(number, "length", {
     63  get() {
     64    return 1;
     65  }
     66 });
     67 
     68 assert.compareArray(Reflect.apply(fn, null, number), [undefined]);
     69 
     70 let boolean = new Boolean();
     71 
     72 Object.defineProperty(boolean, "length", {
     73  get() {
     74    return 1;
     75  }
     76 });
     77 
     78 assert.compareArray(Reflect.apply(fn, null, boolean), [undefined]);
     79 
     80 assert.sameValue(count, 4, 'The value of `count` is 1');
     81 
     82 reportCompare(0, 0);