From c4537b947e4b9a8eeddcdf4e6c0b788544e16744 Mon Sep 17 00:00:00 2001
From: jess <jess@else-if.org>
Date: Sun, 5 Apr 2026 06:01:52 -0700
Subject: [PATCH] add eval test for let-binding with arithmetic expression

---
 core/src/eval.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/core/src/eval.rs b/core/src/eval.rs
index bf0d7fa..c283617 100644
--- a/core/src/eval.rs
+++ b/core/src/eval.rs
@@ -144,4 +144,12 @@ mod tests {
         let s = format_value(3.14);
         assert!(s.starts_with("3.14"));
     }
+
+    #[test]
+    fn eval_x_plus_5() {
+        let doc = "let x = 10\n/= x + 5";
+        let result = evaluate_document(doc);
+        assert_eq!(result.results.len(), 1);
+        assert_eq!(result.results[0].result, "15");
+    }
 }