From 80db2209190064f8c229f30e2707f5164e452f80 Mon Sep 17 00:00:00 2001
From: deibudei <deibudei@noreply.gitcode.com>
Date: Sun, 3 May 2026 18:05:07 +0800
Subject: [PATCH] =?UTF-8?q?fix(repair):=20=E8=A1=A5=E9=BD=90=20OrderServic?=
 =?UTF-8?q?e.calculateUnitPrice=20=E7=9A=84=20quantity=20=E5=8F=82?=
 =?UTF-8?q?=E6=95=B0=E6=A0=A1=E9=AA=8C?=
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---
 .../java/com/example/targetservice/service/OrderService.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/target-service/src/main/java/com/example/targetservice/service/OrderService.java b/target-service/src/main/java/com/example/targetservice/service/OrderService.java
index 73659e8..041aca4 100644
--- a/target-service/src/main/java/com/example/targetservice/service/OrderService.java
+++ b/target-service/src/main/java/com/example/targetservice/service/OrderService.java
@@ -5,8 +5,11 @@
 @Service
 public class OrderService {
 
-    /** Calculates unit price without guarding invalid quantities. */
+    /** Calculates unit price, rejecting non-positive quantities. */
     public int calculateUnitPrice(int totalCents, int quantity) {
+        if (quantity <= 0) {
+            throw new IllegalArgumentException("quantity must be positive");
+        }
         return totalCents / quantity;
     }
 }