jest.config.ts

import type { Config } from 'jest';
import nextJest from 'next/jest.js';

const createJestConfig = nextJest({
  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
  dir: './',
});

// Add any custom config to be passed to Jest
const config: Config = {
  coverageProvider: 'v8',

  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
  },
  // Add more setup options before each test is run
  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
  preset: 'ts-jest',
  transform: {
    '^.+\\.(ts|tsx)$': [
      'ts-jest',
      {
        useESM: true,
      },
    ],
    '^.+\\.(js|jsx)$': [
      'babel-jest',
      {
        presets: ['@babel/preset-env', '@babel/preset-react'],
      },
    ],
  },
  testEnvironment: 'jest-environment-jsdom',
  extensionsToTreatAsEsm: ['.ts', '.tsx'],
};

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
export default createJestConfig(config);