refactor(fromJson/toJson): move the contents of these files into Angular.js

these files are now mostly empty so it doesn't make sense to keep them
separated from other helper functions

Author: IgorMinar

angularFiles.js

@@ -3,7 +3,6 @@ angularFiles = {
     'src/Angular.js',
     'src/loader.js',
     'src/AngularPublic.js',
-    'src/JSON.js',
     'src/jqLite.js',
     'src/apis.js',
 

src/Angular.js

@@ -727,6 +727,59 @@ function bind(self, fn) {
   }
 }
 
+
+function toJsonReplacer(key, value) {
+  var val = value;
+
+  if (/^\$+/.test(key)) {
+    val = undefined;
+  } else if (isWindow(value)) {
+    val = '$WINDOW';
+  } else if (value &&  document === value) {
+    val = '$DOCUMENT';
+  } else if (isScope(value)) {
+    val = '$SCOPE';
+  }
+
+  return val;
+};
+
+
+/**
+ * @ngdoc function
+ * @name angular.toJson
+ * @function
+ *
+ * @description
+ * Serializes input into a JSON-formatted string.
+ *
+ * @param {Object|Array|Date|string|number} obj Input to be serialized into JSON.
+ * @param {boolean=} pretty If set to true, the JSON output will contain newlines and whitespace.
+ * @returns {string} Jsonified string representing `obj`.
+ */
+function toJson(obj, pretty) {
+  return JSON.stringify(obj, toJsonReplacer, pretty ? '  ' : null);
+}
+
+
+/**
+ * @ngdoc function
+ * @name angular.fromJson
+ * @function
+ *
+ * @description
+ * Deserializes a JSON string.
+ *
+ * @param {string} json JSON string to deserialize.
+ * @returns {Object|Array|Date|string|number} Deserialized thingy.
+ */
+function fromJson(json) {
+  return isString(json)
+      ? JSON.parse(json)
+      : json;
+}
+
+
 function toBoolean(value) {
   if (value && value.length !== 0) {
     var v = lowercase("" + value);

src/JSON.js

@@ -542,4 +542,54 @@ describe('angular', function() {
       expect(snake_case('alanBobCharles')).toEqual('alan_bob_charles');
     });
   });
+
+
+  describe('fromJson', function() {
+
+    it('should delegate to JSON.parse', function() {
+      var spy = spyOn(JSON, 'parse').andCallThrough();
+
+      expect(fromJson('{}')).toEqual({});
+      expect(spy).toHaveBeenCalled();
+    });
+  });
+
+
+  describe('toJson', function() {
+
+    it('should delegate to JSON.stringify', function() {
+      var spy = spyOn(JSON, 'stringify').andCallThrough();
+
+      expect(toJson({})).toEqual('{}');
+      expect(spy).toHaveBeenCalled();
+    });
+
+
+    it('should format objects pretty', function() {
+      expect(toJson({a: 1, b: 2}, true)).
+          toBeOneOf('{\n  "a": 1,\n  "b": 2\n}', '{\n  "a":1,\n  "b":2\n}');
+      expect(toJson({a: {b: 2}}, true)).
+          toBeOneOf('{\n  "a": {\n    "b": 2\n  }\n}', '{\n  "a":{\n    "b":2\n  }\n}');
+    });
+
+
+    it('should not serialize properties starting with $', function() {
+      expect(toJson({$few: 'v', $$some:'value'}, false)).toEqual('{}');
+    });
+
+
+    it('should not serialize $window object', function() {
+      expect(toJson(window)).toEqual('"$WINDOW"');
+    });
+
+
+    it('should not serialize $document object', function() {
+      expect(toJson(document)).toEqual('"$DOCUMENT"');
+    });
+
+
+    it('should not serialize scope instances', inject(function($rootScope) {
+      expect(toJson({key: $rootScope})).toEqual('{"key":"$SCOPE"}');
+    }));
+  });
 });