From 9e4d9add2f20e65e8b4430a7933e1d8aba2ab3eb Mon Sep 17 00:00:00 2001
From: overtrue <anzhengchao@gmail.com>
Date: Tue, 28 Apr 2026 17:06:43 +0800
Subject: [PATCH] test(s3): cover select empty error-code fallback

---
 crates/s3/src/select.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/crates/s3/src/select.rs b/crates/s3/src/select.rs
index a752244..8d34352 100644
--- a/crates/s3/src/select.rs
+++ b/crates/s3/src/select.rs
@@ -240,6 +240,12 @@ mod tests {
         assert!(matches!(e, Error::Auth(msg) if msg.contains("Access denied")));
     }
 
+    #[test]
+    fn classify_empty_code_maps_access_denied_substring() {
+        let e = classify_aws_code(Some(""), "Service error: ... AccessDenied ...");
+        assert!(matches!(e, Error::Auth(msg) if msg.contains("Access denied")));
+    }
+
     #[test]
     fn classify_maps_invalid_argument() {
         let e = classify_aws_code(Some("InvalidArgument"), "bad expr");