toolkit/jest.config.js

module.exports = {
  clearMocks: true,
  moduleFileExtensions: ['js', 'ts'],
  roots: ['<rootDir>/packages'],
  testEnvironment: 'node',
  testMatch: ['**/__tests__/*.test.ts'],
  transform: {
    '^.+\\.ts$': ['ts-jest', {isolatedModules: true, diagnostics: {warnOnly: true}}]
  },
  verbose: true
}