diff -r 000000000000 -r a3bb50016d6f main_test.ts
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_test.ts	Fri Sep 19 11:49:40 2025 +0800
@@ -0,0 +1,6 @@
+import { assertEquals } from "@std/assert";
+import { add } from "./main.ts";
+
+Deno.test(function addTest() {
+  assertEquals(add(2, 3), 5);
+});