Serialize only own properties to avoid infinite loops when serializing scopes (this)

Author: Igor Minar

src/JSON.js

@@ -74,7 +74,7 @@ function toJsonArray(buf, obj, pretty, stack){
       var childPretty = pretty ? pretty + "  " : false;
       var keys = [];
       for(var k in obj) {
-        if (k.indexOf('$$') === 0 || obj[k] === undefined)
+        if (!obj.hasOwnProperty(k) || k.indexOf('$$') === 0 || obj[k] === undefined)
           continue;
         keys.push(k);
       }

test/JsonTest.js

@@ -74,6 +74,13 @@ JsonTest.prototype.testItShouldPreventRecursion = function () {
   assertEquals('{"a":"b","recursion":RECURSION}', angular.toJson(obj));
 };
 
+JsonTest.prototype.testItShouldSerializeOnlyOwnProperties = function() {
+  var parent = { p: 'p'};
+  var child = { c: 'c'};
+  child.__proto__ = parent;
+  assertEquals('{"c":"c"}', angular.toJson(child));
+}
+
 JsonTest.prototype.testItShouldSerializeSameObjectsMultipleTimes = function () {
   var obj = {a:'b'};
   assertEquals('{"A":{"a":"b"},"B":{"a":"b"}}', angular.toJson({A:obj, B:obj}));