From 1b86529c03816a4708283791a68b1c27a6bbbf20 Mon Sep 17 00:00:00 2001
From: Jay Kickliter <jay@kickliter.com>
Date: Mon, 26 Feb 2024 15:20:22 -0700
Subject: [PATCH] Test empty disktreemap

---
 src/disktree/mod.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/disktree/mod.rs b/src/disktree/mod.rs
index c6f95a6..f8b46b7 100644
--- a/src/disktree/mod.rs
+++ b/src/disktree/mod.rs
@@ -211,4 +211,16 @@ mod tests {
             "iterating a disktree should yield identically ordered elements as the hextree tree it was derived from"
         );
     }
+
+    #[test]
+    fn test_empty_disktree() {
+        use crate::HexTreeMap;
+        use std::io::Cursor;
+        let mut wtr = vec![];
+        HexTreeMap::<&[u8]>::new()
+            .to_disktree(Cursor::new(&mut wtr), |wtr, val| wtr.write_all(val))
+            .unwrap();
+        let disktree = DiskTreeMap::with_buf(wtr).unwrap();
+        assert_eq!(0, disktree.iter().unwrap().count());
+    }
 }