jest.config.js

module.exports = {
  // Performs test coverage
  roots: ['<rootDir>/tests'],
  collectCoverageFrom: ['<rootDir>/src/**/*.ts', '!<rootDir>/src/main/**'], // Where jest will be applied
  coverageDirectory: 'coverage',
  coverageProvider: 'babel',
  testEnvironment: 'node',
  preset: '@shelf/jest-mongodb',
  transform: {
    // add to any text that has .ts the ts-jest, converted for ts to js
    '.+\\.ts$': 'ts-jest',
  },
  moduleNameMapper: {
    // allows jest to recognize tests that start with import with alias of "@/"
    '@/tests/(.*)': '<rootDir>/tests/$1',
    '@/(.*)': '<rootDir>/src/$1',
  },

  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
  // transformIgnorePatterns: [
  //   "\\\\node_modules\\\\",
  //   "\\.pnp\\.[^\\\\]+$"
  // ],

  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
  // unmockedModulePathPatterns: undefined,

  // Indicates whether each individual test should be reported during the run
  // verbose: undefined,

  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
  // watchPathIgnorePatterns: [],

  // Whether to use watchman for file crawling
  // watchman: true,
};