From c51293b4e0c1591f4992571e808f388e47172078 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 17 Mar 2026 16:10:00 -0700
Subject: [PATCH] Add TTL normalization tests for Go parity verification
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Test that fit_ttl_count normalizes 120m→2h, 24h→1d, 7d→1w even
when count fits in a byte, matching Go's fitTtlCount behavior.
---
 seaweed-volume/src/storage/needle/ttl.rs | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/seaweed-volume/src/storage/needle/ttl.rs b/seaweed-volume/src/storage/needle/ttl.rs
index 7aadb73e2..f44a8c782 100644
--- a/seaweed-volume/src/storage/needle/ttl.rs
+++ b/seaweed-volume/src/storage/needle/ttl.rs
@@ -272,4 +272,38 @@ mod tests {
             }
         );
     }
+
+    #[test]
+    fn test_ttl_normalization_under_256() {
+        // 120 minutes should normalize to 2 hours (matches Go fitTtlCount behavior).
+        // Even though count=120 fits in a byte, Go always normalizes to the coarsest unit.
+        let ttl = TTL::read("120m").unwrap();
+        assert_eq!(
+            ttl,
+            TTL {
+                count: 2,
+                unit: TTL_UNIT_HOUR
+            }
+        );
+
+        // 24 hours should normalize to 1 day
+        let ttl = TTL::read("24h").unwrap();
+        assert_eq!(
+            ttl,
+            TTL {
+                count: 1,
+                unit: TTL_UNIT_DAY
+            }
+        );
+
+        // 7 days should normalize to 1 week
+        let ttl = TTL::read("7d").unwrap();
+        assert_eq!(
+            ttl,
+            TTL {
+                count: 1,
+                unit: TTL_UNIT_WEEK
+            }
+        );
+    }
 }