8.2 Test-Driven Development (TDD) Explained | Red-Green-Refactor | TDD in Java with JUnit

🚀 Test-Driven Development (TDD) is one of the most powerful software development practices — and one of the most commonly asked about in senior Java interviews. In this video, you'll learn what TDD is, the Red-Green-Refactor cycle, and how to apply it in a real Java project. ⏱️ TIMESTAMPS 00:00 – What is TDD (Test-Driven Development)? 00:06 – Why Write Tests Before Code? 00:16 – TDD Helps You Think Through All Scenarios 00:25 – The 3 Phases: Red → Green → Refactor 00:47 – Phase 1: Write a Failing Test (Red) 01:30 – Phase 2: Write Code to Pass the Test (Green) 02:00 – Phase 3: Refactor Without Breaking Tests 02:30 – TDD vs Traditional Development 03:00 – TDD Example in Java with JUnit 04:30 – Benefits: Correctness, Maintainability, Requirements Coverage 05:30 – Summary 📌 What You'll Learn: ✔ What TDD is and why it leads to better code quality ✔ The Red-Green-Refactor cycle in practice ✔ How to implement TDD in a Java project using JUnit ✔ Why TDD makes code more maintainable and requirement-aligned ✔ TDD vs writing tests after code 🔥 Part of the Complete Java & Spring Boot Course for interview preparation. 📞 Book a 1:1 session: https://topmate.io/sps_tech 🌐 Website: https://sps-tech.in #TDD #TestDrivenDevelopment #JUnit #JavaTesting #JavaTutorial #RedGreenRefactor #JavaDeveloper #JavaInterview #UnitTesting #SpringBoot I created this channel to increase knowledge awareness about Java-related topics and explain those topics that every Java developer finds challenging to learn or get started with. Book a call with me:- https://topmate.io/sps_tech Email:- [email protected] Twitter:- https://twitter.com/sps_tech_in Website:- https://sps-tech.in Instagram:- https://www.instagram.com/sps_tech_in/ Linkedin:- https://www.linkedin.com/in/sps-tech-in/ Github:- https://github.com/sumitpalsingh007 Consulting:- https://helloworldtechconsulting.com Do read my pick of the best basic Java interview questions:-https://sps-tech.in/interview-questions/ I recommend these books to enhance your knowledge of Java. Do check out:- Pragmatic Programmer, The: From Journeyman to Master:- https://amzn.to/3MEIuQw Scjp Sun Certified Programmer for Java 6 Study Guide (Exam 310 - 065) (Old Edition):- https://amzn.to/432mRPs Docker Deep Dive: Zero to Docker in a single book:- https://amzn.to/3IoTNtz Cloud Native Microservices with Spring and Kubernetes: Design and Build Modern Cloud Native Applications using Spring and Kubernetes (English Edition):- https://amzn.to/45dG96j Working Effectively with Legacy Code (Robert C. Martin Series):- https://amzn.to/3MHRxjJ Beginning Hibernate: For Hibernate 5:- https://amzn.to/3MjZ1YK Data Structures and Algorithms Made Easy in Java:- https://amzn.to/3IrQz8v Software Architecture in Practice (SEI Series in Software Engineering):- https://amzn.to/3MHYFN2 Java Concurrency In Practice:- https://amzn.to/3MiDeAM Data Structures & Algorithms in Java, 2e:- https://amzn.to/433SAjq