React + TS + Jest + Enzyme

jest.config.js

module.exports = {
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
  },
  roots: [
    '<rootDir>/src/',
    '<rootDir>/tests/',
  ],
  testRegex: '(<rootDir>/tests/.*|(\\.|/)(test|spec))\\.(ts|tsx)$',
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
  verbose: true,
  moduleDirectories: [
    'node_modules',
  ],
  testPathIgnorePatterns: [
    '/node_modules/'
  ],
  testEnvironmentOptions: {
    resources: 'usable'
  },
  snapshotSerializers: [
    'enzyme-to-json/serializer'
  ],
  collectCoverageFrom: [
      '<rootDir>/src/**/*.tsx'
  ],
  coveragePathIgnorePatterns: [
    '/node_modules/',
  ],
  coverageDirectory: '<rootDir>/tests/__coverage__/',
  setupTestFrameworkScriptFile: '<rootDir>/configs/setupTest.js',
  globals: {
    window: {},
    'ts-jest': {
      tsConfig: './tsconfig.json'
    }
  },
  "moduleNameMapper": {
    "^.+\\.(css|less|scss)$": "identity-obj-proxy",
    "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/tests/__mocks__/fileMock.js",
    "^@app(.*)$": "<rootDir>/src/$1"
  }
};

package.json

"scripts": {
  "test": "jest --watch --coverage",
}

setupTests.js

const Enzyme = require('enzyme');
const EnzymeAdapter = require('enzyme-adapter-react-16');

// Setup enzyme's react adapter
Enzyme.configure({
  adapter: new EnzymeAdapter()
});

window.alert = (msg) => { console.log(msg); };
window.matchMedia = () => ({});
window.scrollTo = () => { };