jest.config.js

// eslint-disable-next-line no-undef
module.exports = {
  // The root of your source code, typically /src
  // `<rootDir>` is a token Jest substitutes
  roots: ['<rootDir>'],

  // Jest transformations -- this adds support for TypeScript
  // using ts-jest
  transform: {
    '^.+\\.tsx?$': 'ts-jest'
  },
  moduleNameMapper: {
    '@components/(.*)$': '<rootDir>/src/components/$1',
    '@utils/(.*)$': '<rootDir>/src/utils/$1',
    '@pages/(.*)$': '<rootDir>/src/pages/$1',
    '@helpers/(.*)$': '<rootDir>/src/helpers/$1',
    '\\.(css|less)$': '<rootDir>/src/__mocks__/styleMock.js'
  },
  testEnvironment: 'jsdom',
  testMatch: ['**/?(*.)(spec).tsx'],
  testPathIgnorePatterns: ['<rootDir>/node_modules/'],
  setupFilesAfterEnv: ['@testing-library/jest-dom'],

  // Module file extensions for importing
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']
};