The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/js1_8_5/extensions/mutable-proto-special-form.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,89 @@
     1.4 +// Any copyright is dedicated to the Public Domain.
     1.5 +// http://creativecommons.org/licenses/publicdomain/
     1.6 +
     1.7 +//-----------------------------------------------------------------------------
     1.8 +var BUGNUMBER = 948583;
     1.9 +var summary =
    1.10 +  "Make __proto__ in object literals a special form not influenced by " +
    1.11 +  "|Object.prototype|";
    1.12 +
    1.13 +print(BUGNUMBER + ": " + summary);
    1.14 +
    1.15 +/**************
    1.16 + * BEGIN TEST *
    1.17 + **************/
    1.18 +
    1.19 +var passed = true;
    1.20 +
    1.21 +function performProtoTests(msg)
    1.22 +{
    1.23 +  print("Testing " + msg);
    1.24 +  assertEq(passed, true, "passed wrong at start of test set");
    1.25 +
    1.26 +  assertEq(Object.getPrototypeOf({ __proto__: null }), null);
    1.27 +  assertEq(Object.getPrototypeOf({ __proto__: undefined }), Object.prototype);
    1.28 +  assertEq(Object.getPrototypeOf({ __proto__: 17 }), Object.prototype);
    1.29 +
    1.30 +  var obj = {};
    1.31 +  assertEq(Object.getPrototypeOf({ __proto__: obj }), obj);
    1.32 +
    1.33 +  assertEq(passed, true, "passed wrong at end of test set");
    1.34 +  print("Tests of " + msg + " passed!");
    1.35 +}
    1.36 +
    1.37 +function poisonProto(obj)
    1.38 +{
    1.39 +  Object.defineProperty(obj, "__proto__",
    1.40 +                        {
    1.41 +                          configurable: true,
    1.42 +                          enumerable: true,
    1.43 +                          set: function(v) { passed = false; },
    1.44 +                        });
    1.45 +}
    1.46 +
    1.47 +performProtoTests("initial behavior");
    1.48 +
    1.49 +var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
    1.50 +var setProto = desc.set;
    1.51 +delete Object.prototype.__proto__;
    1.52 +
    1.53 +performProtoTests("behavior after Object.prototype.__proto__ deletion");
    1.54 +
    1.55 +Object.defineProperty(Object.prototype, "__proto__",
    1.56 +                      {
    1.57 +                        configurable: true,
    1.58 +                        enumerable: false,
    1.59 +                        set: function(v) { passed = false; },
    1.60 +                      });
    1.61 +
    1.62 +performProtoTests("behavior after making Object.prototype.__proto__ a " +
    1.63 +                  "custom setter");
    1.64 +
    1.65 +Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
    1.66 +
    1.67 +performProtoTests("behavior after making Object.prototype.__proto__'s " +
    1.68 +                  "[[Set]] === undefined");
    1.69 +
    1.70 +
    1.71 +var superProto = Object.create(null);
    1.72 +poisonProto(superProto);
    1.73 +setProto.call(Object.prototype, superProto);
    1.74 +
    1.75 +performProtoTests("behavior after mutating Object.prototype.[[Prototype]]");
    1.76 +
    1.77 +// Note: The handler below will have to be updated to exempt a scriptable
    1.78 +//       getPrototypeOf trap (to instead consult the target whose [[Prototype]]
    1.79 +//       is safely non-recursive), if we ever implement one.
    1.80 +var death = new Proxy(Object.create(null),
    1.81 +                      new Proxy({}, { get: function() { passed = false; } }));
    1.82 +
    1.83 +setProto.call(Object.prototype, death);
    1.84 +
    1.85 +performProtoTests("behavior after making Object.prototype.[[Prototype]] a " +
    1.86 +                  "proxy that throws for any access");
    1.87 +
    1.88 +
    1.89 +if (typeof reportCompare === "function")
    1.90 +  reportCompare(true, true);
    1.91 +
    1.92 +print("Tests complete");