Fix From BCD scheme validation

src/core/operations/FromBCD.mjs

@@ -70,6 +70,10 @@ class FromBCD extends Operation {
             inputFormat = args[3],
             nibbles = [];
 
+        if (!encoding) {
+            throw new OperationError("Invalid BCD encoding scheme");
+        }
+
         let output = "",
             byteArray;
 

tests/operations/tests/BCD.mjs

@@ -85,6 +85,17 @@ TestRegister.addTests([
             }
         ]
     },
+    {
+        name: "From BCD: invalid encoding scheme",
+        input: "1000",
+        expectedOutput: "Invalid BCD encoding scheme",
+        recipeConfig: [
+            {
+                "op": "From BCD",
+                "args": ["", true, false, "Nibbles"]
+            }
+        ]
+    },
     {
         name: "BCD: raw 4 2 2 1, packed, signed",
         input: "1234567890",