From dc08dc582ddb3f5675e4cae80bb428f976f2f15c Mon Sep 17 00:00:00 2001
From: marko1olo <barsukdana@gmail.com>
Date: Sat, 6 Jun 2026 03:58:14 +0400
Subject: [PATCH] Fix To Base radix validation

---
 src/core/operations/ToBase.mjs  |  2 +-
 tests/operations/index.mjs      |  1 +
 tests/operations/tests/Base.mjs | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 tests/operations/tests/Base.mjs

diff --git a/src/core/operations/ToBase.mjs b/src/core/operations/ToBase.mjs
index 09a91571..53f5eff1 100644
--- a/src/core/operations/ToBase.mjs
+++ b/src/core/operations/ToBase.mjs
@@ -43,7 +43,7 @@ class ToBase extends Operation {
             throw new OperationError("Error: Input must be a number");
         }
         const radix = args[0];
-        if (radix < 2 || radix > 36) {
+        if (!Number.isInteger(radix) || radix < 2 || radix > 36) {
             throw new OperationError("Error: Radix argument must be between 2 and 36");
         }
         return input.toString(radix);
diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index 44792560..7feba513 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -21,6 +21,7 @@ import "./tests/AnalyseUUID.mjs";
 import "./tests/AlternatingCaps.mjs";
 import "./tests/AvroToJSON.mjs";
 import "./tests/BaconCipher.mjs";
+import "./tests/Base.mjs";
 import "./tests/Base32.mjs";
 import "./tests/Base45.mjs";
 import "./tests/Base58.mjs";
diff --git a/tests/operations/tests/Base.mjs b/tests/operations/tests/Base.mjs
new file mode 100644
index 00000000..d173db91
--- /dev/null
+++ b/tests/operations/tests/Base.mjs
@@ -0,0 +1,33 @@
+/**
+ * Base conversion tests
+ *
+ * @author marko1olo
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "To Base: base 2",
+        input: "63",
+        expectedOutput: "111111",
+        recipeConfig: [
+            {
+                "op": "To Base",
+                "args": [2]
+            }
+        ]
+    },
+    {
+        name: "To Base: fractional radix",
+        input: "63",
+        expectedOutput: "Error: Radix argument must be between 2 and 36",
+        recipeConfig: [
+            {
+                "op": "To Base",
+                "args": [2.2]
+            }
+        ]
+    },
+]);