jest.config.js

// eslint-disable-next-line no-undef
module.exports = {
  coverageReporters: [
    'json',
    'lcov',
    'text'
  ],
  coveragePathIgnorePatterns: [
    'src/transpiler/__tests__/__transpiled_testfiles'
  ],
  // The root of your source code, typically /src
  // `<rootDir>` is a token Jest substitutes
  roots: ['<rootDir>/src'],

  // Jest transformations -- this adds support for TypeScript
  // using ts-jest
  transform: {
    '^.+\\.tsx?$': 'ts-jest'
  },

  // Test spec file resolution pattern
  // Matches parent folder `__tests__` and filename
  // should contain `test` or `spec`.
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',

  // Module file extensions for importing
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
  testTimeout: 20000
};