jest.config.js

// jest.config.js
// Under the hood, next/jest is automatically configuring Jest for you, including:
// - Setting up transform using SWC
// - Auto mocking stylesheets (.css, .module.css, and their scss variants), image imports and @next/font
// - Loading .env (and all variants) into process.env
// - Ignoring node_modules from test resolving and transforms
// - Ignoring .next from test resolving
// Loading next.config.js for flags that enable SWC transforms
const nextJest = require('next/jest')

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
/** @type {import('jest').Config} */
const customJestConfig = {
  // Add more setup options before each test is run
  // setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  // 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',
  setupFiles: ['./test/text-encoder-polyfill.ts'], // Add this line to include the polyfill
}

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