jest.config.js

const nextJest = require("next/jest");
const createJestConfig = nextJest({
  dir: "./",
});
const customJestConfig = {
  roots: ['<rootDir>'],
  transform: {
    '^.+\\.ts?$': 'ts-jest'
  },
  // testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.ts?$',
  moduleFileExtensions: ['ts', 'js', 'tsx', 'jsx', 'json', 'node'],
  clearMocks: true,
  coverageDirectory: 'coverage',
  collectCoverage: true,
  collectCoverageFrom: [
    'src/**/*.{js,jsx,ts,tsx}',
    '!<rootDir>/src/*.{js,jsx,ts,tsx}',
    '!<rootDir>/src/**/*mock*.{js,jsx,ts,tsx}',
    '!<rootDir>/src/styles/**/*.{js,jsx,ts,tsx}',
    '!<rootDir>/src/config/**/*.{js,jsx,ts,tsx}',
    '!<rootDir>/src/pages/**/*.{js,jsx,ts,tsx}',
    '!<rootDir>/**/stories.{js,jsx,ts,tsx}',
    '!<rootDir>/src/templates/**/*.{js,jsx,ts,tsx}',
    '!<rootDir>/node_modules/',
  ],
  testPathIgnorePatterns: ['/node_modules/', '/.next/', '/.out/', '/public/'],

  preset: 'ts-jest',
  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],
  setupFilesAfterEnv: ['<rootDir>/.jest/setupTests.ts'],
  moduleDirectories: ["node_modules", "<rootDir>/"],
  // testEnvironment: "jest-environment-jsdom",
  testEnvironment: 'jsdom',
  // testEnvironment: 'node',
  moduleNameMapper: {
    '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
      '<rootDir>/__mocks__/fileMock.js',
    '\\.(css|less)$': 'identity-obj-proxy',
  },

};
module.exports = createJestConfig(customJestConfig);