Issue #51: Update extensionMap()

If user override existing extension, angular properties ($) will be preserved.

This piece of logic could be refactored into separate method:
Something like we have extend(), addMissingProperties() - I can't find a name
for this method...

Closes #51

1 files changed, 7 insertions, 0 deletions

diff --git a/src/Angular.js b/src/Angular.js
index dbd662ce..16b31d4b 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -281,11 +281,18 @@ function inherit(parent, extra) {
 function noop() {}
 function identity($) {return $;}
 function valueFn(value) {return function(){ return value; };}
+
 function extensionMap(angular, name, transform) {
   var extPoint;
   return angular[name] || (extPoint = angular[name] = function (name, fn, prop){
     name = (transform || identity)(name);
     if (isDefined(fn)) {
+      if (isDefined(extPoint[name])) {
+        foreach(extPoint[name], function(property, key) {
+          if (key.charAt(0) == '$' && isUndefined(fn[key]))
+            fn[key] = property;
+        });
+      }
       extPoint[name] = extend(fn, prop || {});
     }
     return extPoint[name];