tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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toprimitive-not-callable-throws.js (1202B)

      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 number.@@toPrimitive is not null, undefined, or callable
      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 
     18  GetMethod (V, P)
     19 
     20  [...]
     21  2. Let func be ? GetV(V, P).
     22  3. If func is either undefined or null, return undefined.
     23  4. If IsCallable(func) is false, throw a TypeError exception.
     24 features: [Symbol.toPrimitive]
     25 ---*/
     26 
     27 var obj = {};
     28 
     29 obj[Symbol.toPrimitive] = 42;
     30 assert.throws(TypeError, function() {
     31  isNaN(obj);
     32 }, "number");
     33 
     34 obj[Symbol.toPrimitive] = "";
     35 assert.throws(TypeError, function() {
     36  isNaN(obj);
     37 }, "string");
     38 
     39 obj[Symbol.toPrimitive] = true;
     40 assert.throws(TypeError, function() {
     41  isNaN(obj);
     42 }, "boolean");
     43 
     44 obj[Symbol.toPrimitive] = Symbol.toPrimitive;
     45 assert.throws(TypeError, function() {
     46  isNaN(obj);
     47 }, "symbol");
     48 
     49 obj[Symbol.toPrimitive] = {};
     50 assert.throws(TypeError, function() {
     51  isNaN(obj);
     52 }, "object");
     53 
     54 reportCompare(0, 0);