From 450087e2800ebe75aacaa25cd522909bf0fb0a49 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Tue, 17 Sep 2019 23:58:14 +0100
Subject: [PATCH] Add test for spending_key panic on short seed

---
 zcash_client_backend/src/keys.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/zcash_client_backend/src/keys.rs b/zcash_client_backend/src/keys.rs
index bae7f5faf..63dd5eeb8 100644
--- a/zcash_client_backend/src/keys.rs
+++ b/zcash_client_backend/src/keys.rs
@@ -30,3 +30,14 @@ pub fn spending_key(seed: &[u8], coin_type: u32, account: u32) -> ExtendedSpendi
         ],
     )
 }
+
+#[cfg(test)]
+mod tests {
+    use super::spending_key;
+
+    #[test]
+    #[should_panic]
+    fn spending_key_panics_on_short_seed() {
+        let _ = spending_key(&[0; 31][..], 0, 0);
+    }
+}