From 6f9685bcba2faced1756b6f6784bf510e889d2d3 Mon Sep 17 00:00:00 2001
From: Alex Chi Z <chi@neon.tech>
Date: Tue, 23 Jul 2024 14:19:57 -0400
Subject: [PATCH] fix tests + fmt

Signed-off-by: Alex Chi Z <chi@neon.tech>
---
 pageserver/src/tenant.rs                     | 3 ++-
 pageserver/src/tenant/timeline/compaction.rs | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/pageserver/src/tenant.rs b/pageserver/src/tenant.rs
index 259fd25e6c8b1..cb3ca9c8b9bc6 100644
--- a/pageserver/src/tenant.rs
+++ b/pageserver/src/tenant.rs
@@ -7341,7 +7341,8 @@ mod tests {
 
     #[tokio::test]
     async fn test_simple_bottom_most_compaction_with_retain_lsns() -> anyhow::Result<()> {
-        let harness = TenantHarness::create("test_simple_bottom_most_compaction_with_retain_lsns").await?;
+        let harness =
+            TenantHarness::create("test_simple_bottom_most_compaction_with_retain_lsns").await?;
         let (tenant, ctx) = harness.load().await;
 
         fn get_key(id: u32) -> Key {
diff --git a/pageserver/src/tenant/timeline/compaction.rs b/pageserver/src/tenant/timeline/compaction.rs
index b1383a105eb5c..82b7845fde206 100644
--- a/pageserver/src/tenant/timeline/compaction.rs
+++ b/pageserver/src/tenant/timeline/compaction.rs
@@ -1281,7 +1281,11 @@ impl Timeline {
         if cfg!(debug_assertions) {
             assert_eq!(
                 lowest_retain_lsn,
-                *retain_lsns_below_horizon.iter().min().unwrap()
+                *retain_lsns_below_horizon
+                    .iter()
+                    .min()
+                    .copied()
+                    .unwrap_or(gc_cutoff)
             );
         }
         info!(