Resolve "Cart controller integration test"

Closes #33 (closed)

src/main/java/com/example/freshonline/model/Cart.java

@@ -6,6 +6,9 @@ import com.example.freshonline.model.StockedGoods;
 
 import com.example.freshonline.model.User;
 
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
 public class Cart {
 
 
@@ -63,6 +66,13 @@ public class Cart {
      */
     private BigDecimal count;
 
+    public Cart(Integer userId, Integer goodsId, BigDecimal count) {
+        this.userId = userId;
+        this.goodsId = goodsId;
+        this.count = count;
+    }
+
+
     /**
      * This method was generated by MyBatis Generator.
      * This method returns the value of the database column cart.user_id