From 44b7d045cdffb93e6b388022a2caaf72349847ee Mon Sep 17 00:00:00 2001
From: Deepak kudi <deepakkudi23@adsl-172-10-9-116.dsl.sndg02.sbcglobal.net>
Date: Thu, 4 Jun 2026 15:19:03 +0530
Subject: [PATCH] fix: validate To BCD scheme option

---
 src/core/operations/ToBCD.mjs  |  4 ++++
 tests/operations/tests/BCD.mjs | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/core/operations/ToBCD.mjs b/src/core/operations/ToBCD.mjs
index 3908742c..d8de7da6 100644
--- a/src/core/operations/ToBCD.mjs
+++ b/src/core/operations/ToBCD.mjs
@@ -67,6 +67,10 @@ class ToBCD extends Operation {
             signed = args[2],
             outputFormat = args[3];
 
+        if (!encoding) {
+            throw new OperationError("Invalid BCD encoding scheme");
+        }
+
         // Split input number up into separate digits
         const digits = input.toFixed().split("");
 
diff --git a/tests/operations/tests/BCD.mjs b/tests/operations/tests/BCD.mjs
index c6715e56..a9e1e344 100644
--- a/tests/operations/tests/BCD.mjs
+++ b/tests/operations/tests/BCD.mjs
@@ -52,6 +52,17 @@ TestRegister.addTests([
             }
         ]
     },
+    {
+        name: "To BCD: invalid scheme",
+        input: "43",
+        expectedOutput: "Invalid BCD encoding scheme",
+        recipeConfig: [
+            {
+                "op": "To BCD",
+                "args": ["", true, false, "Nibbles"]
+            }
+        ]
+    },
     {
         name: "From BCD: default 0",
         input: "0000",