fix: cleanup entire temp directory when using testing_node (#18399)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>
Co-authored-by: Amp <amp@ampcode.com>

crates/node/builder/src/builder/mod.rs

@@ -251,6 +251,8 @@ impl<DB, ChainSpec: EthChainSpec> NodeBuilder<DB, ChainSpec> {
     }
 
     /// Creates a preconfigured node for testing purposes with a specific datadir.
+    ///
+    /// The entire `datadir` will be cleaned up when the node is dropped.
     #[cfg(feature = "test-utils")]
     pub fn testing_node_with_datadir(
         mut self,
@@ -268,7 +270,7 @@ impl<DB, ChainSpec: EthChainSpec> NodeBuilder<DB, ChainSpec> {
         let data_dir =
             path.unwrap_or_chain_default(self.config.chain.chain(), self.config.datadir.clone());
 
-        let db = reth_db::test_utils::create_test_rw_db_with_path(data_dir.db());
+        let db = reth_db::test_utils::create_test_rw_db_with_datadir(data_dir.data_dir());
 
         WithLaunchContext { builder: self.with_database(db), task_executor }
     }

crates/storage/db/src/lib.rs

@@ -203,6 +203,26 @@ pub mod test_utils {
         Arc::new(TempDatabase::new(db, path))
     }
 
+    /// Create read/write database for testing within a data directory.
+    ///
+    /// The database is created at `datadir/db`, and `TempDatabase` will clean up the entire
+    /// `datadir` on drop.
+    #[track_caller]
+    pub fn create_test_rw_db_with_datadir<P: AsRef<Path>>(
+        datadir: P,
+    ) -> Arc<TempDatabase<DatabaseEnv>> {
+        let datadir = datadir.as_ref().to_path_buf();
+        let db_path = datadir.join("db");
+        let emsg = format!("{ERROR_DB_CREATION}: {db_path:?}");
+        let db = init_db(
+            &db_path,
+            DatabaseArguments::new(ClientVersion::default())
+                .with_max_read_transaction_duration(Some(MaxReadTransactionDuration::Unbounded)),
+        )
+        .expect(&emsg);
+        Arc::new(TempDatabase::new(db, datadir))
+    }
+
     /// Create read only database for testing
     #[track_caller]
     pub fn create_test_ro_db() -> Arc<TempDatabase<DatabaseEnv>> {
@@ -235,6 +255,24 @@ mod tests {
     use std::time::Duration;
     use tempfile::tempdir;
 
+    #[test]
+    fn test_temp_database_cleanup() {
+        // Test that TempDatabase properly cleans up its directory when dropped
+        let temp_path = {
+            let db = crate::test_utils::create_test_rw_db();
+            let path = db.path().to_path_buf();
+            assert!(path.exists(), "Database directory should exist while TempDatabase is alive");
+            path
+            // TempDatabase dropped here
+        };
+
+        // Verify the directory was cleaned up
+        assert!(
+            !temp_path.exists(),
+            "Database directory should be cleaned up after TempDatabase is dropped"
+        );
+    }
+
     #[test]
     fn db_version() {
         let path = tempdir().unwrap();