jest.config.ts

import { resolve } from "path";
import type { Config } from "@jest/types";

const config: Config.InitialOptions = {
  verbose: true,
  testMatch: ['**/packages/**/test/?(*[-.])+(spec|test).[jt]s?(x)'],

  // Maps a regular expression for a "path" and maps it to a transformer
  // https://jestjs.io/docs/en/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
  },

  // https://jestjs.io/docs/en/configuration#transformignorepatterns-arraystring
  transformIgnorePatterns: [
    // "<rootDir>/node_modules/(?!(universal-fire|@forest-fire)).+\\.js$",
    resolve(process.cwd(), 'node_modules') +
      `/(?!(universal-fire|@forest-fire)).+\\.js$`,
  ],

  // modules which do NOT export CJS must have an entry to
  // https://jestjs.io/docs/en/configuration#modulenamemapper-objectstring-string--arraystring
  moduleNameMapper: {
    '^@/(.*)$': resolve(process.cwd(), 'src', '$1'),
  },

  // adds more assertions to the default library that Jest provides
  setupFilesAfterEnv: ['jest-extended'],
  testEnvironment: 'node',
};

export default config;