troubleshoot tests

lib/jest.config.ts

@@ -1,8 +1,22 @@
 import type { Config } from 'jest';
 
 const config: Config = {
-  preset: 'ts-jest',
   testEnvironment: 'node',
+  preset: 'ts-jest/presets/default-esm', // or other ESM presets
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  transform: {
+    // '^.+\\.[tj]sx?$' to process ts,js,tsx,jsx with `ts-jest`
+    // '^.+\\.m?[tj]sx?$' to process ts,js,tsx,jsx,mts,mjs,mtsx,mjsx with `ts-jest`
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        useESM: true,
+        tsconfig: './tsconfig.spec.json',
+      },
+    ],
+  },
   // automock: false,
   // setupFiles: ['./jest.setup.ts'],
 };

lib/tsconfig.spec.json

@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "module": "NodeNext", // or "NodeNext"
+    "target": "ES2018",
+    "moduleResolution": "NodeNext", // or "NodeNext"
+    "esModuleInterop": true,
+    "allowImportingTsExtensions": true,
+  }
+}