jest.config.js

const { pathsToModuleNameMapper } = require('ts-jest');
const { compilerOptions } = require('get-tsconfig').getTsconfig('./tsconfig.json')['config'];

module.exports = {
  /* Basic settings */
  // Enable verbosity
  forceExit: false,
  verbose: true,
  // The root directory that Jest should scan for tests and modules within
  rootDir: './',
  // A list of paths to directories that Jest should use to search for files in
  roots: ['<rootDir>'],
  testEnvironmentOptions: {
    NODE_ENV: 'test'
  },
  testMatch: ['<rootDir>/src/**/?(*.)+(unit|int|spec|test).(ts|js)'],
  preset: 'jest-preset-angular',
  // Resolve 'paths' from tsconfig.json
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
  // Ignore paths and modules
  modulePathIgnorePatterns: ['<rootDir>/dist'],
  transformIgnorePatterns: ['node_modules/(?!.*\\.mjs$)'],

  /* Bootstrap settings */
  // Set initial config and enable jest-extended features
  globalSetup: 'jest-preset-angular/global-setup',
  setupFilesAfterEnv: ['<rootDir>/src/jest.setup.ts', 'jest-extended/all'],

  /* Global test settings */
  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  /* Coverage settings */
  collectCoverage: false,
  // The directory where Jest should output its coverage files
  coverageDirectory: 'coverage',
  // An array of glob patterns indicating a set of files for which coverage information should be collected
  collectCoverageFrom: ['<rootDir>/src/**/*.ts'],
  coveragePathIgnorePatterns: ['<rootDir>/node_modules', '<rootDir>/src/types'],
  // Jest custom reporters
  reporters: ['default']
  /* Uncomment if you want to set thresholds for code coverage
  coverageThreshold: {
    global: {
      branches: 100,
      functions: 100,
      lines: 100,
      statements: 100
    }
  }
  */
};