🚀 From Zero to Test Hero: My Journey with API Testing, Keploy & CI/CD Integration

Sumit Saha — Fri, 27 Jun 2025 18:08:40 +0000

Hey Devs! 👋

In this post, I’ll walk you through my hands-on experience building and testing a small Node.js API server from scratch. As part of an assignment, I explored unit testing, integration testing, API testing using AI (Keploy), and even CI/CD integration with GitHub Actions.

💡 What I Built
I created a simple Task Manager API using:

Node.js + Express

SQLite (via better-sqlite3)

Jest & Supertest for testing

✅ What I Learned
How to write unit tests for app logic with and without mocking the DB.

How to implement integration tests to validate DB interaction.

How to use Keploy for AI-powered API testing using OpenAPI + curl logs.

How to automate tests in a CI/CD pipeline with GitHub Actions.

How automated tools like Keploy save hours of manual test writing!

⚙️ Tech Stack
Backend: Node.js, Express

Database: better-sqlite3

Testing: Jest, Supertest, Keploy

CI/CD: GitHub Actions

📊 Achievements
Over 90% test coverage

Fully working GitHub Actions pipeline for every push

Keploy test report screenshot added in the README!

🧠 AI + DevOps is the future, and tools like Keploy make it super easy to reach 100% coverage in minutes — without writing every test manually.

Forem: Sumit Saha

🚀 From Zero to Test Hero: My Journey with API Testing, Keploy & CI/CD Integration