jest.config.ts

import { pathsToModuleNameMapper } from "ts-jest";
// In the following statement, replace `./tsconfig` with the path to your `tsconfig` file
// which contains the path mapping (ie the `compilerOptions.paths` option):
import { compilerOptions } from "./tsconfig.json";
import type { Config } from "jest";

const config: Config = {
  preset: "ts-jest",
  testEnvironment: "jest-environment-jsdom",
  extensionsToTreatAsEsm: [".ts", ".tsx"],
  transform: {
    "^.+\\.tsx?$": [
      "ts-jest",
      {
        useESM: true,
      },
    ],
    // process `*.tsx` files with `ts-jest`
  },
  roots: ["<rootDir>/src"],
  modulePaths: [compilerOptions.baseUrl],
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths),
};

export default config;