From 72f519f5c1d716e0124d2d8a0a54e64362a57bac Mon Sep 17 00:00:00 2001
From: Evgeny Fomin <fominok@hotmail.com>
Date: Wed, 6 Nov 2024 20:39:56 +0100
Subject: [PATCH] wip

---
 grovedb/src/merk_cache.rs | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/grovedb/src/merk_cache.rs b/grovedb/src/merk_cache.rs
index 42e48ce2..3ed25653 100644
--- a/grovedb/src/merk_cache.rs
+++ b/grovedb/src/merk_cache.rs
@@ -235,7 +235,7 @@ impl<'db, 'c> MerkHandle<'db, 'c> {
 mod tests {
     use grovedb_costs::OperationCost;
     use grovedb_path::SubtreePath;
-    use grovedb_storage::StorageBatch;
+    use grovedb_storage::{Storage, StorageBatch};
     use grovedb_version::version::GroveVersion;
 
     use super::MerkCache;
@@ -322,4 +322,35 @@ mod tests {
         // Do something and finalize another batch:
         assert!(cache.finalize().unwrap().unwrap().len() > 0);
     }
+
+    #[test]
+    fn changes_to_merk_are_propagated() {
+        let version = GroveVersion::latest();
+        let db = make_deep_tree(&version);
+        let tx = db.start_transaction();
+
+        let pre_hash = db.root_hash(Some(&tx), &version).unwrap().unwrap();
+
+        let mut cache = MerkCache::new(&db, &tx, version);
+        let [mut subtree] = cache
+            .get_multi_mut([SubtreePath::from(&[TEST_LEAF, b"innertree"])])
+            .unwrap()
+            .unwrap();
+        subtree
+            .insert(b"ayy", Element::new_item(b"lmao".to_vec()), None)
+            .unwrap()
+            .unwrap();
+
+        let batch = cache.finalize().unwrap().unwrap();
+
+        db.db
+            .commit_multi_context_batch(*batch, Some(&tx))
+            .unwrap()
+            .unwrap();
+
+        assert_ne!(
+            pre_hash,
+            db.root_hash(Some(&tx), &version).unwrap().unwrap()
+        )
+    }
 }