tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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toprimitive-result-is-object-throws.js (822B)

      1 // Copyright (C) 2016 The V8 Project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-isnan-number
      6 description: >
      7  Throws a TypeError if the result of calling number.@@toPrimitive is an Object
      8 info: |
      9  isNaN (number)
     10 
     11  1. Let num be ? ToNumber(number).
     12 
     13  ToPrimitive ( input [ , PreferredType ] )
     14 
     15  [...]
     16  4. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
     17  5. If exoticToPrim is not undefined, then
     18    a. Let result be ? Call(exoticToPrim, input, « hint »).
     19    b. If Type(result) is not Object, return result.
     20    c. Throw a TypeError exception.
     21 features: [Symbol.toPrimitive]
     22 ---*/
     23 
     24 var obj = {};
     25 obj[Symbol.toPrimitive] = function() {
     26  return [42];
     27 };
     28 
     29 assert.throws(TypeError, function() {
     30  isNaN(obj);
     31 });
     32 
     33 reportCompare(0, 0);