diff --git a/Quellen.txt b/Quellen.txt
new file mode 100644
index 0000000..732d26e
--- /dev/null
+++ b/Quellen.txt
@@ -0,0 +1,8 @@
+OrderTest, ShopTest, ShoppingCartTest:
+KI als Orientierung für Tests
+Prompt:
+Generiere mir Tests für folgende Methode:
+$Methode
+
+Java Streams:
+https://www.geeksforgeeks.org/java/stream-sorted-in-java/
\ No newline at end of file
diff --git a/src/main/java/org/example/Shop.java b/src/main/java/org/example/Shop.java
index 4577ee3..a6df80b 100644
--- a/src/main/java/org/example/Shop.java
+++ b/src/main/java/org/example/Shop.java
@@ -50,7 +50,7 @@ public class Shop {
                 foundProduct = product;
             }
         }
-        return null;
+        return foundProduct;
     }
 
     public List<Product> getProductList() {