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+// Author:  cirakg & claude ai
+// Summary: Small helpers shared by the Monkey C unit tests (reading vector rows, reporting mismatches).
+
+import Toybox.Lang;
+import Toybox.Test;
+
+(:test)
+module TestSupport {
+
+    // One row of a TestVectors table.
+    function row(table as Array, index as Number) as Array {
+        return table[index] as Array;
+    }
+
+    function str(r as Array, column as Number) as String {
+        return r[column] as String;
+    }
+
+    function bytes(r as Array, column as Number) as ByteArray {
+        return Bytes.fromHex(r[column] as String);
+    }
+
+    function num(r as Array, column as Number) as Number {
+        return r[column] as Number;
+    }
+
+    // Numbers above 2^31 are stored as Long literals in the tables.
+    function long(r as Array, column as Number) as Long {
+        return (r[column] as Number or Long).toLong();
+    }
+
+    function alg(r as Array, column as Number) as Hashes.Algorithm {
+        return r[column] as Hashes.Algorithm;
+    }
+
+    // Compare bytes; log both sides on mismatch. Returns true when equal.
+    function sameBytes(logger as Test.Logger, what as String, actual as ByteArray, expected as ByteArray) as Boolean {
+        if (Bytes.equal(actual, expected)) {
+            return true;
+        }
+        logger.error(what + ": got " + Bytes.toHex(actual) + ", expected " + Bytes.toHex(expected));
+        return false;
+    }
+
+    // Compare strings; log both sides on mismatch.
+    function sameString(logger as Test.Logger, what as String, actual as String, expected as String) as Boolean {
+        if (actual.equals(expected)) {
+            return true;
+        }
+        logger.error(what + ": got '" + actual + "', expected '" + expected + "'");
+        return false;
+    }
+}