From 12f355a3bc35c1be93827dcc1a2099954676fe0f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=89=E6=AD=A3=E8=B6=85?= <anzhengchao@gmail.com>
Date: Mon, 20 Apr 2026 12:27:22 +0800
Subject: [PATCH] test: cover S3 error XML body compatibility (#2606)

---
 rustfs/src/server/layer.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/rustfs/src/server/layer.rs b/rustfs/src/server/layer.rs
index e4b9c7743..df272d190 100644
--- a/rustfs/src/server/layer.rs
+++ b/rustfs/src/server/layer.rs
@@ -871,6 +871,30 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn test_fix_s3_error_message_in_xml_reports_changed_body() {
+        let body = Full::from(Bytes::from_static(b"<Error><Code>SignatureDoesNotMatch</Code></Error>"));
+
+        let (fixed, changed) = fix_s3_error_message_in_xml(body).await.unwrap();
+        let bytes = BodyExt::collect(fixed).await.unwrap().to_bytes();
+
+        assert!(changed);
+        assert!(bytes.starts_with(b"<Error><Code>SignatureDoesNotMatch</Code><Message>"));
+        assert!(bytes.ends_with(b"</Message></Error>"));
+    }
+
+    #[tokio::test]
+    async fn test_fix_s3_error_message_in_xml_reports_unchanged_body() {
+        let input = Bytes::from_static(b"<Error><Code>AccessDenied</Code></Error>");
+        let body = Full::from(input.clone());
+
+        let (fixed, changed) = fix_s3_error_message_in_xml(body).await.unwrap();
+        let bytes = BodyExt::collect(fixed).await.unwrap().to_bytes();
+
+        assert!(!changed);
+        assert_eq!(bytes, input);
+    }
+
     #[test]
     fn test_insert_missing_signature_error_message() {
         let (fixed, changed) =