add tests

Author: augustas1

jest.config.js

@@ -0,0 +1,9 @@
+import { createDefaultPreset } from "ts-jest";
+
+/** @type {import("jest").Config} **/
+export default {
+  ...createDefaultPreset(),
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  }
+};

package.json

@@ -8,6 +8,7 @@
     "node": ">=20.0.0"
   },
   "scripts": {
+    "test": "jest",
     "build": "tsc",
     "prepack": "pnpm build"
   },
@@ -28,8 +29,11 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.26.0",
+    "@types/jest": "^30.0.0",
     "eslint": "^9.26.0",
     "globals": "^16.1.0",
+    "jest": "^30.0.4",
+    "ts-jest": "^29.4.0",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.32.1"
   }