Utilities

• @golevelup/ts-jest and @golevelup/ts-vitest - Utilities for making testing NestJS applications easier. Currently supports Jest and Vitest
• @nest-openapi/mock - Spec-driven mock server utility for generating realistic mock responses from OpenAPI specifications. (Documentation)
• mockingbird - A library to create typed tests fixtures/mocks using decorators and built-in faker support
• NestJS + Pact - Injectable Pact.js Consumer/Provider for NestJS
• Suites - Unit testing framework for TypeScript backends working with inversion of control (IoC) and dependency injection frameworks.