Nodejs Testing Best Practices

screenshot of Nodejs Testing Best Practices
express
nestjs

Beyond the basics of Node.js testing. Including a super-comprehensive best practices list and an example app (April 2025)

Overview

Navigating the landscape of modern testing with Node.js can be overwhelming, but there’s a comprehensive guide that breaks it all down. This guide equips developers with over 50 best practices and examples to ensure their testing processes are efficient and effective. With an example application demonstrating real-world testing scenarios, developers can learn how to streamline their workflows and implement robust testing strategies.

Whether you're a seasoned developer or just beginning, this guide covers a wide range of topics from database setup to dealing with message queues. It's filled with insights and strategies gleaned from consulting with numerous companies and tackling the challenges they face in testing.

Features

  • 50+ Best Practices List: Offers detailed instructions on writing modern tests correctly, ensuring developers can adopt best practices seamlessly.
  • Example Application: A complete showcase of a typical Node.js backend with performant tests setup that runs 40 tests in just 5 seconds, including database interactions.
  • Advanced Topics: Covers essential topics beyond the basics, such as testing with databases, external service interactions, and message queues.
  • Strategy & Workflow: Provides guidance on which tests to prioritize in 2025 with actionable best practices.
  • Optimizing Infrastructure: Best practices for optimizing your database, message queues, and other infrastructure for effective testing.
  • Integration Techniques: Detailed approaches for testing collaborations with third-party components, ensuring smooth integration.
  • Mocking Practices: Offers strategies for effective mocking, allowing developers to focus on component test prevention without unnecessary complexity.
  • Online Course & Workshop: A special online course and a chance to attend an in-person workshop in Athens to deepen your understanding of these testing practices.
express
Express

Express.js is a simple Node.js framework for single, multi-page, and hybrid web applications.

nestjs
Nest

A progressive Node.js framework for building efficient, scalable, and enterprise-grade server-side applications with TypeScript/JavaScript.

eslint
Eslint

ESLint is a linter for JavaScript that analyzes code to detect and report on potential problems and errors, as well as enforce consistent code style and best practices, helping developers to write cleaner, more maintainable code.

typescript
Typescript

TypeScript is a superset of JavaScript, providing optional static typing, classes, interfaces, and other features that help developers write more maintainable and scalable code. TypeScript's static typing system can catch errors at compile-time, making it easier to build and maintain large applications.