Add ts-jest settings

Author: HwangTaehyun

api/index.ts

@@ -1,14 +1,14 @@
+import { renderStatsCard } from "@/src/cards/stats-card";
+import blacklist from "@/src/common/blacklist";
 import {
   clampValue,
   CONSTANTS,
-  isLocaleAvailable,
   parseArray,
   parseBoolean,
   renderError,
-} from "@/index.js";
-import renderStatsCard from "@/src/cards/stats-card";
-import blacklist from "@/src/common/blacklist";
+} from "@/src/common/utils";
 import fetchStats from "@/src/fetchers/stats-fetcher";
+import { isLocaleAvailable } from "@/src/translations";
 import * as dotenv from "dotenv";
 import express from "express";
 

babel.config.js

@@ -0,0 +1,3 @@
+export default {
+  presets: ["@babel/preset-env"],
+};

jest.config.js

@@ -1,6 +1,14 @@
 export default {
+  transform: {
+    "^.+\\.[t|j]s$": [
+      "ts-jest",
+      {
+        useESM: true,
+      },
+    ],
+  },
+  extensionsToTreatAsEsm: [".ts"],
   clearMocks: true,
-  transform: {},
   testEnvironment: "jsdom",
   coverageProvider: "v8",
   testPathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/tests/e2e/"],
@@ -9,4 +17,8 @@ export default {
     "<rootDir>/node_modules/",
     "<rootDir>/tests/E2E/",
   ],
+  moduleNameMapper: {
+    "^@/(.*)$": "<rootDir>/$1",
+  },
+  modulePaths: ["<rootDir>"],
 };