jest.config.ts

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

// Providing the path to your Next.js app which will enable loading next.config.js and .env files
const createJestConfig = nextJest({ dir: './' })

// Any custom config you want to pass to Jest
const customJestConfig = {
  testEnvironment: 'node',
  preset: 'ts-jest',

  globals: {
    'ts-jest': {
      tsconfig: 'tsconfig.test.json',
    },
  },

  testTimeout: 120000,

  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // A list of paths to modules that run some code to configure or set up the testing framework before each test
  setupFilesAfterEnv: ['@testing-library/jest-dom', './jest.setup.js'],

  moduleNameMapper: {
    'src/(.*)': '<rootDir>/src/$1',
  },
}

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