Merge pull request #8 from SpaceK33z/fix-undefined-argument

Fix undefined argument in `then` when using options.success

Author: akre54

backbone.fetch.js

@@ -61,7 +61,10 @@
           throw error;
         });
       })
-      .then(options.success);
+      .then(function(responseData) {
+        if (options.success) options.success(responseData);
+        return responseData;
+      });
   };
 
   if (typeof exports === 'object') {

test/fetch.js

@@ -124,6 +124,8 @@ describe('backbone.fetch', function() {
         success: function(response) {
           expect(response).to.deep.equal({status: 'ok'});
         }
+      }).then(function(response) {
+        expect(response).to.deep.equal({status: 'ok'});
       });
       server.respond('{"status": "ok"}');
       return promise;