tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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value-number-non-finite.js (867B)

      1 // Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-serializejsonproperty
      5 description: >
      6  Non-finite numbers as serialized as null.
      7 info: |
      8  JSON.stringify ( value [ , replacer [ , space ] ] )
      9 
     10  [...]
     11  12. Return ? SerializeJSONProperty(the empty String, wrapper).
     12 
     13  SerializeJSONProperty ( key, holder )
     14 
     15  [...]
     16  4. If Type(value) is Object, then
     17    a. If value has a [[NumberData]] internal slot, then
     18      i. Set value to ? ToNumber(value).
     19  [...]
     20  9. If Type(value) is Number, then
     21    a. If value is finite, return ! ToString(value).
     22    b. Return "null".
     23 ---*/
     24 
     25 assert.sameValue(JSON.stringify(Infinity), 'null');
     26 assert.sameValue(JSON.stringify({key: -Infinity}), '{"key":null}');
     27 assert.sameValue(JSON.stringify([NaN]), '[null]');
     28 
     29 reportCompare(0, 0);