jest.config.js

module.exports = {
  clearMocks: true,
  moduleFileExtensions: ['js', 'ts'],
  testEnvironment: 'node',
  testMatch: ['**/*.test.ts'],
  transform: {
    '^.+\\.ts$': 'ts-jest'
  },
  verbose: true,
  collectCoverage: true,
  collectCoverageFrom: ['src/*.ts', '!src/constants.ts'],
  automock: false,
  resetMocks: true,
  restoreMocks: true
}