Nilesh Kumar
Enthusiastic software developer with keen interest in building large-scale systems. Experienced in developing end-to-end solutions using Microservice architecture and writing clean and scalable code, with excellent debugging skills.
Articles
Insight
Oct 28, 2025
Introduction to Integration Testing
Integration testing verifies module interactions, data flow, and system behavior. A must-have testing strategy for building reliable, scalable, and high-quality software systems.
Insight
Jul 17, 2025
How to Mock in Integration Tests Tools and Implementation
Mock smarter in integration testing. Explore tools like Nock, Sinon, and Jest with hands-on examples and a step-by-step guide to accurate and efficient mocks.
Insight
May 29, 2025
Introduction to Unit Testing in NestJS: Why It Matters
Learn why unit testing matters in NestJS, the tools you need (Jest, @nestjs/testing), and how to test services with a real-world UserService example.
Insight
May 29, 2025
Writing Effective Unit Tests: Best Practices
Master unit testing in JavaScript with Jest. Learn AAA pattern, mocking, isolation, test coverage, edge cases, and TDD with clear, maintainable examples.
