--- title: "Kaustav Singha Roy (@kaustavroy) | Hashnode" description: "HCL Tech. Software Testing, QA Automation. Read the latest articles by Kaustav Singha Roy on Hashnode." url: "https://hashnode.com/@kaustavroy" --- @kaustavroy # Kaustav Singha Roy @kaustavroy · Joined April 2023 HCL Tech. Software Testing, QA Automation ### [Blue Green Deployment — How It Works](https://kaustavsingharoy.hashnode.dev/blue-green-deployment-how-it-works?utm_source=hashnode&utm_medium=feed) Blue-Green deployment strategy process flow along with benefits 5 min read · [kaustavsingharoy.hashnode.dev](https://kaustavsingharoy.hashnode.dev/blue-green-deployment-how-it-works?utm_source=hashnode&utm_medium=feed) [Mar 24, 2024](https://hashnode.com/posts/blue-green-deployment-how-it-works/6600774d2311ec514aee37f7) ### [A Study in Favour of Shift-Left Testing](https://kaustavsingharoy.hashnode.dev/a-study-in-favour-of-shift-left-testing?utm_source=hashnode&utm_medium=feed) The significance of Shift-Left testing, its divergence from traditional methods and how you should adapt 3 min read · [kaustavsingharoy.hashnode.dev](https://kaustavsingharoy.hashnode.dev/a-study-in-favour-of-shift-left-testing?utm_source=hashnode&utm_medium=feed) [Mar 16, 2024](https://hashnode.com/posts/a-study-in-favour-of-shift-left-testing/65f5f1084bd0202e325af721) ### [Test Automation — Playwright vs Puppeteer](https://kaustavsingharoy.hashnode.dev/test-automation-playwright-vs-puppeteer?utm_source=hashnode&utm_medium=feed) Puppeteer has been the go-to solution for many developers since its introduction in 2017 when it comes to browser based test automation, thanks to its robust features and user-friendly approach. However, in recent years Microsoft developed and releas... 4 min read · [kaustavsingharoy.hashnode.dev](https://kaustavsingharoy.hashnode.dev/test-automation-playwright-vs-puppeteer?utm_source=hashnode&utm_medium=feed) [Dec 15, 2023](https://hashnode.com/posts/test-automation-playwright-vs-puppeteer/657c85e818193fd1fa32479a) ### [TDD vs BDD vs ATDD vs DDD - Different Ways to Develop Software](https://kaustavsingharoy.hashnode.dev/tdd-vs-bdd-vs-atdd-vs-ddd-different-ways-to-develop-software?utm_source=hashnode&utm_medium=feed) TDD vs BDD vs ATDD vs DDD - Different Way to Develop Software 4 min read · [kaustavsingharoy.hashnode.dev](https://kaustavsingharoy.hashnode.dev/tdd-vs-bdd-vs-atdd-vs-ddd-different-ways-to-develop-software?utm_source=hashnode&utm_medium=feed) [Dec 10, 2023](https://hashnode.com/posts/tdd-vs-bdd-vs-atdd-vs-ddd-different-ways-to-develop-software/6575973aef3f630f419cf0fb)