jest.preset.js

const path = require('path');
const nxPreset = require('@nx/jest/preset').default;
const { pathsToModuleNameMapper } = require('ts-jest');
const { compilerOptions } = require('./tsconfig.base.json');

module.exports = {
  ...nxPreset,
  transform: {
    '^.+\\.m?[tj]sx?$': [
      'ts-jest',
      {
        tsconfig: '<rootDir>/tsconfig.spec.json',
      },
    ],
  },
  globals: {},
  setupFilesAfterEnv: [path.join(__dirname, 'jest.setup.ts')],
  moduleNameMapper: {
    ...pathsToModuleNameMapper(compilerOptions.paths, {
      prefix: process.cwd(),
    }),
    // Force module uuid to resolve with the CJS entry point, because Jest does not support package.json.exports. See https://github.com/uuidjs/uuid/issues/451
    uuid: require.resolve('uuid'),
  },
  /* TODO: Update to latest Jest snapshotFormat
   * By default Nx has kept the older style of Jest Snapshot formats
   * to prevent breaking of any existing tests with snapshots.
   * It's recommend you update to the latest format.
   * You can do this by removing snapshotFormat property
   * and running tests with --update-snapshot flag.
   * Example: "nx affected --targets=test --update-snapshot"
   * More info: https://jestjs.io/docs/upgrading-to-jest29#snapshot-format
   */
  snapshotFormat: { escapeString: true, printBasicPrototype: true },
};