tests/stress/object-get-own-property-symbols.js

   1 // This tests Object.getOwnPropertySymbols.
   2
   3 var global = (Function("return this")());
   4
   5 // private names for privileged code should not be exposed.
   6 if (Object.getOwnPropertySymbols(global).length !== 0)
   7     throw "Error: bad value " + Object.getOwnPropertySymbols(global).length;
   8
   9 var object = {};
  10 var symbol = Symbol("Cocoa");
  11 object[symbol] = "Cappuccino";
  12 if (Object.getOwnPropertyNames(object).length !== 0)
  13     throw "Error: bad value " + Object.getOwnPropertyNames(object).length;
  14 if (Object.getOwnPropertySymbols(object).length !== 1)
  15     throw "Error: bad value " + Object.getOwnPropertySymbols(object).length;
  16 if (Object.getOwnPropertySymbols(object)[0] !== symbol)
  17     throw "Error: bad value " + String(Object.getOwnPropertySymbols(object)[0]);
  18
  19 function forIn(obj) {
  20     var array = [];
  21     // Symbol should not be enumerated.
  22     for (var key in obj) array.push(key);
  23     return array;
  24 }
  25
  26 if (forIn(object).length !== 0)
  27     throw "Error: bad value " + forIn(object).length;
  28 if (Object.keys(object).length !== 0)
  29     throw "Error: bad value " + Object.keys(object).length;
  30
  31 delete object[symbol];
  32 if (Object.getOwnPropertyNames(object).length !== 0)
  33     throw "Error: bad value " + Object.getOwnPropertyNames(object).length;
  34 if (Object.getOwnPropertySymbols(object).length !== 0)
  35     throw "Error: bad value " + Object.getOwnPropertySymbols(object).length;