From dd94b59a25fd0724ff921929f95bdc344e39ea4d Mon Sep 17 00:00:00 2001
From: Ben C <ben@bwc9876.dev>
Date: Thu, 12 Mar 2026 19:58:26 -0400
Subject: [PATCH] Tests for returning None

---
 src/brain.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/brain.rs b/src/brain.rs
index 2e5a342..2a25a62 100644
--- a/src/brain.rs
+++ b/src/brain.rs
@@ -322,6 +322,23 @@ mod tests {
         }
     }
 
+    #[test]
+    fn none_on_empty() {
+        let mut brain = Brain::default();
+
+        let reply = brain.respond("hello", false, false, None);
+        assert_eq!(reply, None);
+    }
+
+    #[test]
+    fn none_on_end() {
+        let mut brain = Brain::default();
+        brain.ingest("world hello");
+
+        let reply = brain.respond("hello", false, false, None);
+        assert_eq!(reply, None);
+    }
+
     #[test]
     fn long_chain() {
         const LETTERS: &str = "abcdefghijklmnopqrstuvwxyz";
-- 
2.51.2