Agile Technical Practices Distilled
Agile Technical Practices Distilled
A Journey Toward Mastering Software Design
About the Book
The authors of the book have been working as software developers and coaches for years, accumulating more then half a century of experience. During this period working in the trenches of teaching software design we created lots of content and shared many stories of real professional life among us. From the feedback we had, we thought it would be a good idea to organize all the information in a single place, following a logical sequence, creating a sort of learning journey. We touch all the principles we consider important to master, dropping too many details. In our profession the information are far too many to be all memorized, let alone mastered. The ability to select what to focus on is maybe more important then the ability of learning itself. We all are very excited to be able to share with you our personal selection of content and the lessons we learned the hard way. We genuinely hope that at the end of it you will find some new ideas for improving your Software Design skills, the relationship within your team and your business as well.
About the Authors
About the Contributors
Table of Contents
-
Introduction
-
AGILE TECHNICAL PRACTICES
- Is this book for me?
- Why we wrote this book
- Why distilled?
- What are Agile Technical Practices?
- Rules, principles and values
- How this book is organized
- How to get the most out of this book
- Resources
-
AGILE TECHNICAL PRACTICES
-
First steps
-
PAIR PROGRAMMING
- What is pair programming?
- Roles
- Driver/Navigator switch techniques
- Breaks
- Katas
- When should I move to the next chapter?
- Resources
-
CLASSIC TDD I – TEST-DRIVEN DEVELOPMENT
- Classic TDD
- The three laws of TDD
- Refactoring and the Rule of Three – baby steps
- Three methods of moving forward in TDD
- Degrees of freedom
- Naming tests
- A test name pattern
- Katas
- More katas
- Great habits
- Classic TDD flow
- Where are we in the big picture of OO software design?
- When should I move to the next chapter?
- Resources
-
CLASSIC TDD II
- Writing the assertion first and working backward
- Organizing your test in arrange, act and assert blocks
- Unit test principles
- Katas
- Great habits
- Classic TDD flow
- Where are we in the big picture of OO software design?
- When should I move to the next chapter?
- Resources
-
CLASSIC TDD III – TRANSFORMATION PRIORITY PREMISE
- Kata
- TPP – Defining obvious implementation
- Katas
- Great habits
- Classic TDD flow
- Where are we in the big picture of OO software design?
- When should I move to the next chapter?
- Resources
-
DESIGN I – OBJECT CALISTHENICS
- It’s the design…
- Kata
- Object calisthenics – 10 steps for better software design
- Heuristics
- Katas
- Great habits
- Classic TDD flow
- Where are we in the big picture of OO software design?
- When should I move to the next chapter?
- Resources
-
PAIR PROGRAMMING
-
Walking
-
DESIGN II - REFACTORING
- When to refactor (for now)
- Main refactors
- IDE agility (a.k.a. know your shortcuts)
- Kata
- Refactor 80-20 rule
- Refactoring guidelines
- Kata
- Parallel change (or expand, migrate and contract)
- Kata
- Great habits
- When should I move to the next chapter?
- Resources
-
DESIGN III – CODE SMELLS
- Design smells
- Code smells
- Highlighted code smells
- Object calisthenics preventing code smells
- When to refactor (extended for code smells)
- Refactor code smells
- Kata
- Great habits
- Classic TDD flow
- The big picture
- When should I move to the next chapter?
- Resources
-
TEST DOUBLES
- Principles
- Different types of Test Doubles
- Test Doubles guidelines
- Katas
- Great habits
- When should I move to the next chapter?
- Resources
-
TESTING LEGACY CODE
- Breaking dependencies using a seam
- Characterization tests
- Kata
- Golden Master
- Kata
- Approval Tests by Llewellyn Falco
- Revisiting the refactoring guidelines
- Kata
- Conclusions
- Great habits
- When should I move to the next chapter?
- Resources
-
DESIGN IV – DESIGN PATTERNS
- Design patterns advantages
- Design patterns pitfalls
- Quick reference catalogue
- Revisiting the refactoring guidelines
- Kata
- Great habits
- When should I move to the next chapter?
- Resources
-
DESIGN II - REFACTORING
-
Running
-
DESIGN V – COHESION AND COUPLING
- Coupling
- Cohesion
- Katas
- When to refactor (extended for Cohesion/Coupling)
- Classic TDD flow
- The big picture
- When should I move to the next chapter?
- Resources
-
DESIGN VI – SOLID PRINCIPLES++
- Single Responsibility Principle
- Open/Closed Principle
- Liskov Substitution Principle
- Interface Segregation Principle
- Dependency Inversion Principle
- Balanced Abstraction Principle
- Principle of Least Astonishment (a.k.a. WTF principle)
- Kata
- When to refactor (extended for SOLID principles)
- Classic TDD flow
- The big picture
- When should I move to the next chapter?
- Resources
-
DESIGN VII - CONNASCENCE
- Definition
- Dimensions
- Connascence of Name and Type (CoN and CoT)
- Connascence of Position (CoP)
- Connascence of Value (CoV)
- Connascence of Meaning (or Convention) (CoM)
- Connascence of Algorithm (CoA)
- Connascence of Execution Order (CoEO)
- Connascence of Timing (CoTm)
- Connascence of Identity (CoI)
- Connascence of Manual Task (CoMT)
- Classic TDD flow
- The big picture
- When should I move to the next chapter?
- Resources
-
DESIGN VIII – THE FOUR ELEMENTS OF SIMPLE DESIGN
- What are the four elements of simple design?
- What does each element mean?
- Alternative definitions of simple design
- Our personal definitions of simple design
- Kata
- Classic TDD flow
- The big picture
- When should I move to the next chapter?
- Resources
-
DESIGN IX - CONCLUSION
- Cohesion and Coupling as forces
- The 3 Cs of design: from Cohesion and Coupling to Connascence
- Systems Entropy
- The big picture
- Resources
-
DESIGN V – COHESION AND COUPLING
-
Flying
-
OUTSIDE-IN DEVELOPMENT
- Classic TDD approach
- Acceptance tests
- Test boundaries
- Double loop TDD
- The Outside-In approach
- Outside-In TDD: London school
- The direction of dependencies
- Should I use classic TDD or Outside-In TDD?
- Kata
- The big picture
- Great habits
- Resources
-
BEHAVIOR-DRIVEN DEVELOPMENT (A.K.A. LOVE YOUR REQUIREMENTS)
- Poka-yoke
- Mistakes versus defects: feedback is the cure (again)
- Bugs and communication
- User stories
- Behavior-Driven Development
- Acceptance Tests done right
- Boundaries
- The walking skeleton
- Kata
- Resources
-
UNDERSTAND THE BUSINESS
- Knowledge versus understanding
- Theory of Constraints
- Domain-Driven Design: What domain?
- Beyond requirements: knowledge crunching
- Value stream and domain events
- Bounded contexts and communication
- Business and DevOps
- System Thinking and Sociotechnical organizations
- Resources
-
THE STORY OF TEAM C
- Terraforming
- Team building
- The backlog: crunching knowledge for breakfast
- Cracking on
- From forming to performing
- Outside-In ATDD with optional unit tests
- The green flag
- The moral of the story
-
CONCLUSION
- The human factor
- Team play
- Bounded rationality and knowledge sharing
- Resources
-
OUTSIDE-IN DEVELOPMENT
-
Appendices
- THE 12 AGILE PRINCIPLES
-
PopcornFlow by Claudio Perrone
- The 7-steps decision cycle
- The principles
- Who can benefit from PopcornFlow
- Resources
-
EventStorming by Alberto Brandolini
- Silos and value stream
- The importance of learning
- The EventStorming approach
- The workshop: a quick overview
- Different flavors of EventStorming
- Complex Systems and proven solutions
- Resources
-
License: CyberDojo
- About CyberDojo Foundation exercises
- Web resources
-
SAMPLE SOLUTIONS
- Sample solutions: FizzBuzz in Clojure
- Sample solutions: Fibonacci sequence in C++
- Sample solutions: Roman numerals in C#
- Sample solutions: TicTacToe in Swift (partial solution)
- Sample solutions: Connecting code smells with Cohesion/Coupling
- Sample solutions: Connecting object calisthenics with code smells and Cohesion/Coupling
- Sample solutions: Connecting Cohesion / Coupling and SOLID principles
-
ABOUT THE AUTHORS
- Pedro
- Marco
- Alessandro
- Personalized coaching
- FEEDBACK PLEASE
- Notes
Authors have earned$9,705,112writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
The Leanpub 45-day 100% Happiness Guarantee
Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
- #1
Ansible for Kubernetes
Jeff GeerlingAnsible is a powerful infrastructure automation tool. Kubernetes is a powerful application deployment platform. Learn how to use these tools to automate massively-scalable, highly-available infrastructure.
- #2
Functional Design and Architecture
Alexander GraninSoftware Design in Functional Programming, Design Patterns and Practices, Methodologies and Application Architectures. How to build real software in Haskell with less efforts and low risks. The first complete source of knowledge.
- #3
Production Haskell
Matt ParsonsAre you excited about Haskell, but don't know where to begin? Are you thrilled by the technical advantages, but worried about the unknown pitfalls? This book has you covered.
- #4
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
- #5
Tame your Work Flow
Steve Tendon and Daniel DoironDo you need a high performance enterprise governance approach improving management, execution and delivery while dealing with multiple projects/products, events, stakeholders and teams? Giving you better bottom line results, faster time to market, less work, better predictability, happier employees, and delighted clients? Then learn about TameFlow!
- #6
Practical FP in Scala: A hands-on approach
Gabriel VolpeA practical book aimed for those familiar with functional programming in Scala who are yet not confident about architecting an application from scratch.
Together, we will develop a purely functional application using the best libraries in the Cats ecosystem, while learning about design patterns and best practices.
- #7
Composing Software
Eric ElliottAll software design is composition: the act of breaking complex problems down into smaller problems and composing those solutions. Most developers have a limited understanding of compositional techniques. It's time for that to change.
- #8
Algebra-Driven Design
Sandy MaguireA how-to field guide on building leak-free abstractions and algebraically designing real-world applications.
- #9
Invest In Digital Health - The Medical Futurist's Guide
Dr. Bertalan MeskoArtificial Intelligence and Digital Health are booming. In this book, we explain why now it's a good time to invest in Digital Health and give recommendations on where to invest by looking at the top 24 technological trends we find the most promising.
- #10
The Hundred-Page Machine Learning Book
Andriy BurkovEverything you really need to know in Machine Learning in a hundred pages.
Top Bundles
- #1
The Tester's Library
8 Books
The Tester's Library consists of eight five-star books that every software tester should read and re-read. As bound books, this collection would cost over $200. Even as e-books, their price would exceed $80, but in this bundle, their cost is only $49.99. Here are the books, and why they should be in your library: Perfect Software and Other... - #2
agile
11 Books
In this bundle, you will find 10 different agile books. They are about different aspects of being agile. - finding a job - doing coding dojo's - Retrospectives - Personal kanban - a non-typical coaching book and even a book that gives you an insight in the lives of some agile people. - #3
WTFlop 6M + HU - Beta Bundle
6 Books
- #4
Marionette.js A to Z
3 Books
Marionette.js has become a popular Backbone-based javascript library, because it helps you avoid boiler-plate code and focus on what makes your app special. But how do you get started?Whether you want to finally get started with dynamic client-side programming (like one reader did), or are an experienced front-end dev who has inherited a... - #5
Build A Better Backbone App
3 Books
The best way to learn new development skills is through experience, but that takes time you don't have.Get the best of both worlds with this bundle: you'll learn how to produce modern web applications by learning from experienced developers like Derick Bailey and David Sulc. BackboneJS is one of the favorite tools on the web today, but it... - #6
General Systems Thinker Bundle
5 Books
The General Systems Thinker Bundle is just that: a bundle of five books to advance the reader one giant step toward improved thinking, based on General Systems principles. Four of the books are the complete General Systems Series. The fifth is fictional piece which shows some general systems thinkers in action. It's a mystery in which a group of... - #7
Experiential Learning Bundle
4 Books
This bundle provides all four volumes of the popular Experiential Learning Series at a savings of $20 over the price if purchased separately. - #8
Ansible Bundle
2 Books
After getting up and running with Ansible in Jeff Geerling's Ansible for DevOps, strengthen your skills managing tens to thousands of instances and services in Amazon's AWS cloud with Yan Kurniawan's Ansible for AWS. - #9
Learn ECMAScript 6 inside and out
2 Books
For any technology, it helps to get multiple points of view on the functionality to get the best possible understanding. For ECMAScript 6/2015, no two resources are recommended more frequently thanExploring ES6by Dr. Axel Rauschmayer andUnderstanding ECMAScript 6by Nicholas C. Zakas. These two points of view, investigating the specification and... - #10
NetBeans Platform Starter Kit
2 Books
In this bundle, you get a complete introduction to the NetBeans Platform APIs, together with many exercises, in the form of "NetBeans Platform for Beginners". This book is done and has been reviewed and is over 350 pages in length. It will continue to grow as more content is added over time. There will be monthly updates, with new sections,...
