Medium - Dynamically matching files in Jest - using different configuration files

jest.config.integration.only.js

module.exports = {
  ...require('./jest.config'),
  testMatch: ['**/?(*.)+(test).js']
}

jest.config.js

module.exports = {
  roots: [
    '<rootDir>/dist/',
  ],
  testEnvironment: 'node',
  transform: {
    '^.+\\.(ts|tsx)$': 'ts-jest',
  },
  testMatch: ['**/?(*.)+(spec|test).js']
}

jest.config.spec.only.js

module.exports = {
  ...require('./jest.config'),
  testMatch: ['**/?(*.)+(spec).js']
}

package.json

{
  ...
  "scripts": {
    ...
    "build": "rm -rf dist && tsc",
    "prespec": "yarn build",
    "spec": "yarn jest --config jest.config.spec.only.js --passWithNoTests",
    "preintegration": "yarn build",
    "integration": "yarn jest --config jest.config.integration.only.js --passWithNoTests",
    "pretest": "yarn build",
    "test": "yarn jest --passWithNoTests"
  }
}