From bde569d0551604b984adb16e9f7de9d22c534c9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=89=E6=AD=A3=E8=B6=85?= <anzhengchao@gmail.com>
Date: Wed, 6 May 2026 08:47:02 +0800
Subject: [PATCH] test(getobject): cover buffer threshold edge cases (#2817)

---
 rustfs/src/app/object_usecase.rs | 43 ++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/rustfs/src/app/object_usecase.rs b/rustfs/src/app/object_usecase.rs
index 4543cd934..1a108ed0a 100644
--- a/rustfs/src/app/object_usecase.rs
+++ b/rustfs/src/app/object_usecase.rs
@@ -4609,6 +4609,49 @@ mod tests {
         ));
     }
 
+    #[test]
+    fn should_buffer_get_object_in_memory_respects_configured_threshold_below_cap() {
+        let info = ObjectInfo::default();
+        let configured_threshold = 10_i64 * 1024 * 1024;
+
+        assert!(should_buffer_get_object_in_memory_with_threshold(
+            &info,
+            configured_threshold,
+            None,
+            false,
+            configured_threshold
+        ));
+        assert!(!should_buffer_get_object_in_memory_with_threshold(
+            &info,
+            configured_threshold + 1,
+            None,
+            false,
+            configured_threshold
+        ));
+    }
+
+    #[test]
+    fn should_buffer_get_object_in_memory_rejects_unknown_lengths_and_disabled_thresholds() {
+        let info = ObjectInfo::default();
+        let configured_threshold = 10_i64 * 1024 * 1024;
+
+        assert!(!should_buffer_get_object_in_memory_with_threshold(
+            &info,
+            0,
+            None,
+            false,
+            configured_threshold
+        ));
+        assert!(!should_buffer_get_object_in_memory_with_threshold(
+            &info,
+            -1,
+            None,
+            false,
+            configured_threshold
+        ));
+        assert!(!should_buffer_get_object_in_memory_with_threshold(&info, 1024, None, false, 0));
+    }
+
     struct ReadProbeReader {
         reads: Arc<AtomicUsize>,
     }