Test-Driven Development is one of the few truly new Agile ideas. Originally created by Kent Beck as part of Extreme Programming, it’s a fantastic way of making sure your code does what you intended it to do. It’s not perfect, but it’s a powerful tool for creating robust and reliable software. In this session, we’re joined by two folks with decades of TDD experience: Mike “GeePaw” Hill and J. B. Rainsberger. About the Art of Agile Development Book Club: Fridays from 8:00 – 8:45am Pacific, I host an online discussion inspired by the new edition of my book, The Art of Agile Development (https://www.jamesshore.com/s/aoad2). Each session uses a chapter from the book as a jumping-off point for a wide-ranging discussion about Agile ideas and practices. To join the book club live, see https://www.jamesshore.com/s/aoad2bookclub.

TDD is one of those very rare software engineering practices that can make a real difference to the quality of your code. It is really more about Test Driven Design than it is about testing. The ’test-driven’ part of ’test-driven development’ is best practised by seeing each test as a mini-specification, this was the idea that gave birth to BDD, and is a useful way to think of things, so less ’TDD vs BDD’ and more ’BDD *is* TDD’. So what is Test Driven Development really? Why should you be using TDD in your regular development and how should you get started with it? In this episode, Dave Farley explores the What, Why and How of TDD and makes his case for why you should adopt it as a cornerstone of your approach to software development. --------------------------------------------------------------------------------------- Get a FREE "How To..." Guide - TDD: Red, Green, Refactor when you join our CD Mail List ➡️ https://www.subscribepage.com/cd-guide-tdd -------------------------------------------------------------------------------------- 🎓 CD TRAINING COURSES 🎓 If you want to learn Continuous Delivery and DevOps skills, check out Dave Farley's courses ➡️ https://bit.ly/DFTraining 📚 BOOKS: 📖 Dave’s NEW BOOK "Modern Software Engineering" is now available on Amazon ➡️ https://amzn.to/3DwdwT3 In this book, Dave brings together his ideas and proven techniques to describe a durable, coherent and foundational approach to effective software development, for programmers, managers and technical leads, at all levels of experience. 📖 "Continuous Delivery Pipelines" by Dave Farley paperback ➡️ https://amzn.to/3gIULlA ebook version ➡️ https://leanpub.com/cd-pipelines 📖 The original award-winning "Continuous Delivery" book by Dave Farley and Jez Humble ➡️ https://amzn.to/2WxRYmx --------------------------------------------------------------------------------------- Links: The research that I referenced on project failures in production: https://bit.ly/3bVdLwb Useful Books on this topic: (Please note, if you buy a book from these links I get a small fee, without increasing the cost to you) Growing Object Oriented Software Guided by Tests, By Nat Price & Steve Freeman ➡️ https://amzn.to/2Lt3jho Test Driven Development: By Example (The Addison-Wesley Signature Series), Kent Beck ➡️ https://amzn.to/2NcqgGh Extreme Programming Explained: Embrace Change, Kent Beck ➡️ https://amzn.to/2GpQRjE

We’re so pleased to announce that we’ve teamed up with Dave Farley, author of “Continuous Delivery” and frequent GOTO Conferences speaker, for a monthly video series featuring ideas about continuous delivery, DevOps, test-driven development, BDD, software engineering and software development in general. Find plenty more from Dave on his Continuous Delivery YouTube channel: https://www.youtube.com/channel/UCCfqyGl3nq_V0bo64CjZh8g Dave Farley - Continuous Delivery & DevOps Pioneer, Award-winning Author, Founder & Director of Continuous Delivery Ltd. ABSTRACT Test Driven Development is one of the best ways that we have to amplify our talent as software developers, maybe software engineers. This Software Engineering practice is one of the best ways to improve the quality of your code, but it is difficult to do it well, and it often goes wrong. The interesting thing is that when it goes wrong, it may be at its most valuable. TDD is a cornerstone of Continuous Delivery, BDD and DevOps. Using it to give us valuable, efficient feedback on the quality of our designs is at the heart of its value but is often missed by people who are new to it. Dave explores these ideas with some real code examples to demonstrate the value of TDD. In this episode, Dave Farley explains 5 common ways that TDD goes wrong, how to fix them, and what we can learn from them. Some of the ideas in this video were inspired by this blog post: https://web.archive.org/web/20100105084725/http://blog.james-carr.org/2006/11/03/tdd-anti-patterns/ CD TRAINING COURSES If you want to learn Continuous Delivery and DevOps skills, check out Dave Farley's courses https://bit.ly/DFTraining RECOMMENDED BOOKS You can grab Dave Farley's new book 'Continuous Delivery Pipelines' here: https://leanpub.com/cd-pipelines Dave Farley & Jez Humble • Continuous Delivery • https://amzn.to/3ocIHwd David Farley • Modern Software Engineering • https://amzn.to/3GI468M https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.facebook.com/GOTOConferences #GOTOxDaveFarley #TDD #TestDrivenDevelopment #DaveFarley #GOTO #GOTOcon #BDD #ContinuousDelivery #DevOps #Testing DAVE'S LINKS https://www.continuous-delivery.co.uk https://twitter.com/davefarley77 http://www.davefarley.net Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at https://gotopia.tech SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1

What is TDD, what does it take to get started learning to do it, and how should you practice it? This Test Driven Development tutorial explores all of these ideas in the context of a demonstration of working on a simple Coding Kata, called FizzBuzz. It also demonstrates the best place for to start, TDD for beginners, if you want to get started. In this episode Dave Farley of Continuous Delivery demonstrates the easiest way to begin with TDD and how it morphs into Test Driven Design, using the excellent practice tool Cyber Dojo. Cyber Dojo allows you to practice TDD in a wide variety of languages and technologies with almost zero setup. Dave demonstrates the use of Cyber-Dojo at the same time as describing some subtle and important aspects of basic TDD. ------------------------------------------------------------------------------------- LINKS 🔗 It is free for individuals to use Cyber Dojo to practise TDD (but not for commercial users) and you are encouraged to make a donation to help kids learn about computers ➡️ https://cyber-dojo.org See the whole tutorial exercise ➡️ https://courses.cd.training or watch the second part of this exercise here ➡️ https://youtu.be/S4tMJKupvHg ------------------------------------------------------------------------------------- 📚 BOOKS: 📖 Dave’s NEW BOOK "Modern Software Engineering" is now available on Kindle ➡️ https://amzn.to/3DwdwT3 (Paperback version available soon) In this book, Dave brings together his ideas and proven techniques to describe a durable, coherent and foundational approach to effective software development, for programmers, managers and technical leads, at all levels of experience. 📖 "Continuous Delivery Pipelines" by Dave Farley paperback ➡️ https://amzn.to/3gIULlA ebook version ➡️ https://leanpub.com/cd-pipelines 📖 The original, award-winning "Continuous Delivery" book by Dave Farley and Jez Humble ➡️ https://amzn.to/2WxRYmx ------------------------------------------------------------------------------------- Also from Dave: 🎓 CD TRAINING COURSES ➡️ https://bit.ly/DFTraining 📧 JOIN CD MAIL LIST ➡️ https://bit.ly/MailListCD to get regular updates, advice and offers from Dave and Continuous Delivery! ------------------------------------------------------------------------------------- CHANNEL SPONSORS: Equal Experts is a product software development consultancy with a network of over 1,000 experienced technology consultants globally. They increase the pace of innovation by using modern software engineering practices that embrace Continuous Delivery, Security, and Operability from the outset ➡️ https://bit.ly/3ASy8n0 Harness helps engineers and developers simplify and scale CI/CD, Feature Flags and Cloud Cost Management with an AI-powered platform for software delivery. ➡️ https://bit.ly/3Cfx3qI Octopus are the makers of Octopus Deploy the single place for your team to manage releases, automate deployments, and automate the runbooks that keep your software operating. ➡️ https://octopus.com/ SpecFlow Behavior Driven Development for .NET SpecFlow helps teams bind automation to feature files and share the resulting examples as Living Documentation across the team and stakeholders. ➡️ https://go.specflow.org/dave_farley

This interview was recorded for the GOTO Book Club. #GOTOcon #GOTObookclub http://gotopia.tech/bookclub Read the full transcription of the interview here: https://gotopia.tech/bookclub/episodes/learning-test-driven-development Saleem Siddiqui - Author of "Learning Test-Driven Development" & Principal Architect at SPR Dave Farley - Author of "Modern Software Engineering", Continuous Delivery & DevOps Pioneer Find plenty more from Dave on his @ModernSoftwareEngineeringYT YouTube channel. DESCRIPTION You may think test-driven development wouldn't work in your preferred programming language, or that it would disrupt your code writing — this Book Club episode proves otherwise. Saleem Siddiqui, author of “Learning Test-Driven Development,” and Dave Farley, author of "Modern Software Engineering," review the multiple ways test-driven development can yield more effective results and produce higher quality code. The interview is based on Saleem's book "Learning Test-Driven Development": https://amzn.to/35OMb3n Check out Saleem on O'Reilly's learning platform: https://learning.oreilly.com/get-learning/?code=LTDD21 TIMECODES 00:00 Intro 01:30 Why write the book in 3 languages (Go, JS & Python)? 11:52 Why is TDD difficult to adopt but easy to abandon? 26:38 Red-green refactoring (RGR): why it matters 32:47 Refactoring in TDD 35:43 Continuous integration 38:00 When to use TDD 48:03 Main takeaways from the book 53:48 Outro RECOMMENDED BOOKS Saleem Siddiqui • Learning Test-Driven Development • https://amzn.to/35OMb3n Saleem Siddiqui, Michael Landy & Jeff Swisher • Jbuilder Developer's Guide • https://amzn.to/3uifzbL David Farley • Modern Software Engineering • https://amzn.to/3GI468M Dave Farley & Jez Humble • Continuous Delivery • https://amzn.to/3ocIHwd Roy Osherove • The Art of Unit Testing • https://bit.ly/3obiKNB Kent Beck • Test Driven Development • https://amzn.to/36kchvd Nicole Forsgren, Jez Humble & Gene Kim • Accelerate • https://amzn.to/367RI5o https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.facebook.com/GOTOConferences #TDD #SoftwareEngineering #SaleemSiddiqui #DaveFarley #Programming #Testing #TestDrivenDevelopment #UnclutteredCode #Coding #SoftwareArchitecture #RGR #Refactor #Polyglot #Golang #JavaScript #Python #UnitTesting #ContinuousDelivery #ContinuousDeployment #Accelerate #TDDTutorial #TestingTutorial SUPPORTER Harness is the only end-to-end platform for complete software delivery. It provides a simple, safe and secure way for engineering and DevOps teams to release applications into production. Try Harness for free! https://app.harness.io/auth/#/signup/?utm_source=External&utm_medium=social&utm_content=virtual-event&utm_campaign=goto-bookclub-sponsor Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at https://gotopia.tech SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1

I’ve been using TDD/BDD at work for the last 12 years, I also teach and mentor teams on this subject. I’ve found that misconceptions and errors in this field are shared, and that most of us make the same mistakes. Give me 45 minutes of your time, and I’ll try to address the most common problems, hoping to improve your TDD/BDD situation as much as possible. I’ll try to solve: Long running tests problem, by bringing back the correct shape of test-pyramid with power of Hexagonal Architecture (Ports & Adapters) with practical examples in Spring. Miscommunication and lost art of requirement gathering, by focusing on readability, introducing just enough of Domain Specific Language, and sorting out what is important with the power of Spock. Difficult test setup and environment requirements, by using command and conquer, modularity, monitoring. Mock abuse, by showing what are the benefits of in-memory implementations. And hopefully more. Most teams that do not write tests first do it, because it’s hard for them. I’ll try to show you, how to make it easy. Real life examples included. If you are not using TDD/BDD, this might also interest you - you’ll know how to start the right way.

🗓️ Upcoming developer events: https://dev.events Since Kent Beck wrote the book on TDD in 2002 a lot of words have been dedicated to the subject. But many of them propagated misunderstandings of Kent's original rules so that TDD practice bears little resemblance to Kent's original ideas. Key misunderstandings around what do I test, what is a unit test, and what is the 'public interface' have led to test suites that are brittle, hard to read, and do not support easy refactoring. In this talk, we re-discover Kent's original proposition, discover where key misunderstandings occurred and look at a better approach to TDD that supports software development instead of impeding it. Be prepared from some sacred cows to be slaughtered and fewer but better tests to be written.