fix leveled compaction tests

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

mini-lsm-mvcc/src/compact/leveled.rs

@@ -118,6 +118,21 @@ impl LeveledCompactionController {
             }
         }
         priorities.sort_by(|a, b| a.partial_cmp(b).unwrap().reverse());
+
+        println!(
+            "target level sizes: {:?}, real level sizes: {:?}, base_level: {}",
+            target_level_size
+                .iter()
+                .map(|x| format!("{:.3}MB", *x as f64 / 1024.0 / 1024.0))
+                .collect::<Vec<_>>(),
+            real_level_size
+                .iter()
+                .map(|x| format!("{:.3}MB", *x as f64 / 1024.0 / 1024.0))
+                .collect::<Vec<_>>(),
+            base_level,
+        );
+        println!("compaction triggered by priority: {:?}", priorities);
+
         let priority = priorities.first();
         if let Some((_, level)) = priority {
             println!(