minimal-setup for jest and lint using babel

.eslintrc.js

// .eslintrc.js

const config = {
  "extends" : "airbnb",
  "parser": "babel-eslint",
  "rules": {
    "no-plusplus": 2,
    "no-console": "off",
  },
  "env": {
    "jest": true
  }
}

module.exports = config;

.gitignore

node_modules/
logs/
coverage/
npm-debug.log

.next
build/
.env

.DS_Store
.vscode
tmp/
tmp-*/
log/
test-results/
public/*bundle.*

babel.config.js

// babel.config.js

module.exports = {
  presets: [
    [
      '@babel/preset-env',
      {
        targets: {
          node: 'current',
        },
      },
    ],
  ],
};

command-line

$ yarn lint ./
yarn run v1.13.0
$ eslint --ignore-path .gitignore --ignore-pattern '**/dist/' --ext .jsx,.js ./
Done in 0.82s.

$ yarn test
yarn run v1.13.0
$ jest
Determining test suites to run...
# GLOBAL TEST SETUP #
 PASS   test  ./hello.spec.js
  ✓ hello should return hello with my name (2ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        0.399s, estimated 1s
Ran all test suites.
# GLOBAL TEST TEARDOWN #
Done in 0.99s.

hello.js

// hello.js

const hello = name => `Hello, ${name}`;

module.exports = hello;

hello.spec.js

// hello.spec.js

import hello from './hello';

test('hello should return hello with my name', () => {
  const res = hello('my name');
  expect(res).toEqual('Hello, my name');
});

jest.config.js

// jest.config.js

const ignoredPaths = [
  '<rootDir>/node_modules/',
  '<rootDir>/dist',
  '<rootDir>/test/',
];

module.exports = {
  displayName: 'test',
  verbose: true,
  testEnvironment: 'node',
  testPathIgnorePatterns: ignoredPaths,
  setupFilesAfterEnv: ['<rootDir>/test/setupTestFramework.js'],
  globalSetup: '<rootDir>/test/setup.js',
  globalTeardown: '<rootDir>/test/teardown.js',
  moduleNameMapper: {
  },
  resetModules: false,
  transform: {
    '^.+\\.js?$': '<rootDir>/node_modules/babel-jest',
    '^.+\\.ts?$': '<rootDir>/node_modules/babel-jest',
  },
  testRegex: '((\\.|/)(test|spec))\\.(js?|ts?)$',
  moduleFileExtensions: ['ts', 'js'],
};

package.json

{
  "name": "minsetup-jest-lint-babel",
  "version": "1.0.0",
  "description": "minimal setup for jest and lint using babel",
  "main": "hello.js",
  "scripts": {
    "lint": "eslint --ignore-path .gitignore --ignore-pattern '**/dist/' --ext .jsx,.js",
    "lint:fix": "npm run lint -- --fix",
    "test": "jest"
  },
  "author": "hyunsamk",
  "license": "ISC",
  "dependencies": {
  },
  "devDependencies": {
    "@babel/core": "^7.4.3",
    "@babel/preset-env": "^7.4.5",
    "babel-eslint": "^10.0.2",
    "babel-jest": "^24.8.0",
    "eslint": "^5.16.0",
    "eslint-config-airbnb": "^17.1.0",
    "eslint-plugin-import": "^2.17.0",
    "jest": "^24.8.0",
    "jest-junit": "^6.4.0"
  }
}

test-setup.js

// test/setup.js

module.exports = () => {
  console.log('# GLOBAL TEST SETUP #');
};

test-setupTestFramework.js

// test/setupTe...js
// this file is ran right after the test framework is setup for some test file.

jest.setTimeout(5000);

test-teardown.js

// test/teardown.js

module.exports = () => {
  console.log('# GLOBAL TEST TEARDOWN #');
};