jest.config.ts

import type { JestConfigWithTsJest } from 'ts-jest';

const jestConfig: JestConfigWithTsJest = {
  // [...]
  // Replace `ts-jest` with the preset you want to use
  // from the above list
  preset: 'ts-jest',
  testEnvironment: 'jsdom',
  moduleDirectories: ['node_modules', __dirname],
  moduleNameMapper: {
    '\\.(css|less|scss)$': 'identity-obj-proxy',
  },
  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
  transform: {
    '^.+\\.tsx?$': [
      'ts-jest',
      // required due to custom location of tsconfig.json configuration file
      // https://kulshekhar.github.io/ts-jest/docs/getting-started/options/tsconfig
      { tsconfig: './tsconfig.jest.json' },
    ],
  },
};

export default jestConfig;