Latest articles, tutorials, and deep dives from ndlab tech blog.
Integration tests verify the entire request pipeline—controllers, DTOs, pipes, filters, interceptors, and database behavior. This post shows how to test your REST API like a professional.
In this post, you’ll learn how to isolate and test NestJS services, validate DTOs programmatically, and verify custom pipes with clear testing strategies.
Before you write your first test, you need a stable foundation: Jest configuration, test modules, a sandboxed PostgreSQL database, and a clean Prisma workflow for reproducible tests.
A productive backend engineer knows how to manage migrations, environments, Dockerized databases, and workflow scripts. This post makes those skills second nature.
Your API becomes truly useful only when the frontend can rely on it. In this post, you’ll learn how to shape consistent REST contracts, shared types, and error formats for React applications.
Production backends thrive on predictable errors, structured validation, and consistent responses. In this post, you’ll learn how to build those foundations using NestJS pipes, filters, and interceptors.
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