From 213b76af10172e832dc097d86f132869e41f1610 Mon Sep 17 00:00:00 2001
From: Harrison Booth <73434116+Harrison-Booth@users.noreply.github.com>
Date: Fri, 30 Oct 2026 19:39:26 -0500
Subject: [PATCH] Expand bit shift boundary regressions

---
 crates/functions/src/engineering.rs | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/crates/functions/src/engineering.rs b/crates/functions/src/engineering.rs
index a02196f41..96d73bf78 100644
--- a/crates/functions/src/engineering.rs
+++ b/crates/functions/src/engineering.rs
@@ -450,12 +450,19 @@ mod tests {
         is_err(ev("BITLSHIFT", vec![n(1.0), n(54.0)]), CellError::Num);
         is_err(ev("BITLSHIFT", vec![n(2f64.powi(47)), n(1.0)]), CellError::Num);
         for f in ["BITLSHIFT", "BITRSHIFT"] {
-            for shift in [-100.0, -54.0, 54.0, 100.0] {
+            for shift in [-100.0, -54.0, -53.0, 53.0, 54.0, 100.0] {
                 close(ev(f, vec![n(0.0), n(shift)]), 0.0);
             }
-            is_err(ev(f, vec![n(1.0), n(54.0)]), CellError::Num);
+            for shift in [-100.0, -54.0, 54.0, 100.0] {
+                is_err(ev(f, vec![n(1.0), n(shift)]), CellError::Num);
+            }
+            if f == "BITLSHIFT" {
+                is_err(ev(f, vec![n(1.0), n(53.0)]), CellError::Num);
+            } else {
+                close(ev(f, vec![n(1.0), n(53.0)]), 0.0);
+            }
+            is_err(ev(f, vec![n(0.0), t("bad")]), CellError::Value);
         }
-        is_err(ev("BITLSHIFT", vec![n(0.0), t("bad")]), CellError::Value);
         is_err(ev("BITRSHIFT", vec![n(-1.0), n(100.0)]), CellError::Num);
     }