jest.config.js

// jest.config.js
const nextJest = require('next/jest');

const createJestConfig = nextJest({
  dir: './',
});

const esModules = [
  //TODO those we might need later, example is name of library like: 'is-plain-obj',
].join('|');

// Add any custom config to be passed to Jest
/** @type {import('jest').Config} */
const customJestConfig = {
  // Add more setup options before each test is run
  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
  // if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
  moduleDirectories: ['node_modules', '<rootDir>/'],
  testEnvironment: 'jest-environment-jsdom',
  moduleNameMapper: {
    '^@/app/(.*)$': '<rootDir>/src/app/$1',
  },
  transform: {
    [`(${esModules}).+\\.js$`]: 'babel-jest',
  },
  transformIgnorePatterns: [
    `[/\\\\]node_modules[/\\\\](?!${esModules}).+\\.(js|jsx|mjs|cjs|ts|tsx)$`,
  ],
};

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
module.exports = createJestConfig(customJestConfig);