Update matchingFakes, always returns array

Author: takasmiley

lib/sinon/spy.js

@@ -296,8 +296,7 @@ var spyApi = {
         var args = slice.call(arguments);
 
         if (this.fakes) {
-            var matchings = this.matchingFakes(args, true);
-            var matching = matchings && matchings.pop();
+            var matching = this.matchingFakes(args, true).pop();
 
             if (matching) {
                 return matching;
@@ -335,11 +334,7 @@ var spyApi = {
     },
 
     matchingFakes: function (args, strict) {
-        if (!this.fakes) {
-            return undefined;
-        }
-
-        return this.fakes.filter(function (fake) {
+        return (this.fakes || []).filter(function (fake) {
             return fake.matches(args, strict);
         });
     },

lib/sinon/stub.js

@@ -90,15 +90,9 @@ var proto = {
             var args = slice.call(arguments);
             var matchings = functionStub.matchingFakes(args);
 
-            var fnStub;
-            if (matchings) {
-                fnStub = matchings.sort(function (a, b) {
-                    return a.matchingArguments.length - b.matchingArguments.length;
-                }).pop();
-            }
-            if (!fnStub) {
-                fnStub = functionStub;
-            }
+            var fnStub = matchings.sort(function (a, b) {
+                return a.matchingArguments.length - b.matchingArguments.length;
+            }).pop() || functionStub;
             return getCurrentBehavior(fnStub).invoke(this, arguments);
         };