Blog

• How to Unit Test a NestJS Service with Jest

  September 11, 2026

  A complete walkthrough of unit testing a NestJS service with Jest: describe/it/beforeEach, the TestingModule, mocking a repository, and reading a coverage report.

• NestJS Integration Testing: Controller, Service, and Repository Together

  September 11, 2026

  How integration testing differs from mocked unit tests in NestJS: wiring a controller, service, and a real repository through the TestingModule, with no mocks at all.

• How to Unit Test a NestJS Controller with Jest

  September 11, 2026

  Unit testing a NestJS controller with Jest: mocking a service dependency through the TestingModule, testing route handlers, and testing errors the service throws.