adding an extra injector spec

- added a spec for dependency graph resolution
- also simplyfying cache presence check

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Injector.js b/src/Injector.js
index 5ba2cbfc..b3d8f113 100644
--- a/src/Injector.js
+++ b/src/Injector.js
@@ -43,7 +43,7 @@ function createInjector(providerScope, providers, cache) {
   return function inject(value, scope, args){
     var returnValue, provider;
     if (isString(value)) {
-      if (!cache.hasOwnProperty(value)) {
+      if (!(value in cache)) {
         provider = providers[value];
         if (!provider) throw "Unknown provider for '"+value+"'.";
         cache[value] = inject(provider, providerScope);