feat($cookieStore): $cookieStore.get now parses blank string as blank string

closes #1918

Author: alonbardavid

src/ngCookies/cookies.js

@@ -139,7 +139,8 @@ angular.module('ngCookies', ['ng']).
          * @returns {Object} Deserialized cookie value.
          */
         get: function(key) {
-          return angular.fromJson($cookies[key]);
+          var value = $cookies[key];
+          return value ? angular.fromJson(value) : value;
         },
 
         /**

test/ngCookies/cookiesSpec.js

@@ -125,4 +125,15 @@ describe('$cookieStore', function() {
     $rootScope.$digest();
     expect($browser.cookies()).toEqual({});
   }));
+  it('should handle empty string value cookies', inject(function ($cookieStore, $browser, $rootScope) {
+    $cookieStore.put("emptyCookie",'');
+    $rootScope.$digest();
+    expect($browser.cookies()).
+        toEqual({ 'emptyCookie': '""' });
+    expect($cookieStore.get("emptyCookie")).toEqual('');
+
+    $browser.cookieHash['blankCookie'] = '';
+    $browser.poll();
+    expect($cookieStore.get("blankCookie")).toEqual('');
+  }))
 });