SlideShare a Scribd company logo
1 of 14
Download to read offline
Coding Dojo:
Refactoring the
Tennis Kata
Agile Testing Days 2013
Peter Kofler, ‘Code Cop’
@codecopkofler
www.code-cop.org
Copyright Peter Kofler, licensed under CC-BY.
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Peter Kofler
• Software Developer
for 14 years
• “fanatic about
code quality”
• I help development teams to do it right
• Pair Programming #CodeCopTour
Expectations?
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Coding Dojo Mindset
●

Safe place outside
work

●

We are here to learn

●

Need to slow down

●

Focus on doing it right

●

Collaborative Game
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Dojo Structure
●

Introduction 15'

●

Coding 30'

●

Interim (Retrospective) 15'

●

Break 25'

●

Coding 45'

●

Retrospective 15'
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

TDD Skills
●

Driving Development with Tests

●

Designing Test Cases

●

Designing Clean Code

●

Refactoring Safely 
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Scoring in Tennis Game
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Requirements
●

Get the code
https://github.com/codecop/Tennis-Kata-ATD2013

●

●

●

Focus entirely on Clean-up
Refactor in small steps
●
Experiment with approaches
Run tests often
Don't Focus on
Getting it Done.
F0cus on Doing
It Perfectly.
→Practice
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Closing Circle
●

What did you learn today?

●

What surprised you today?

●

What will you do
differently in the
future?
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Please evaluate my presentation
using the AgileTD Mobile App at
www.touchmyconference.com/ATD2013

I appreciate your feedback.
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Peter Kofler
@codecopkofler
www.code-cop.org

Kata by

Emily Bache
@emilybache
http://emilybache.blogspot.co.at/2011/08/refactoring-kata-fun.html
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

CC Images
●

Dojo http://www.flickr.com/photos/49715404@N00/3267627038/

●

Todos http://www.flickr.com/photos/kylesteeddesign/3724074594/

●

Tennis http://www.flickr.com/photos/gagillphoto/3706167856/

●

Wants you http://www.flickr.com/photos/shutter/105497713/

More Related Content

Similar to Refactoring the Tennis Kata (2013)

Coding Dojo: Adding Tests to Legacy Code (2014)
Coding Dojo: Adding Tests to Legacy Code (2014)Coding Dojo: Adding Tests to Legacy Code (2014)
Coding Dojo: Adding Tests to Legacy Code (2014)
Peter Kofler
 
Deliberate Practice (2014)
Deliberate Practice (2014)Deliberate Practice (2014)
Deliberate Practice (2014)
Peter Kofler
 
Coding Dojo: Baby Steps (2014)
Coding Dojo: Baby Steps (2014)Coding Dojo: Baby Steps (2014)
Coding Dojo: Baby Steps (2014)
Peter Kofler
 
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
Peter Kofler
 
Coding Dojo: Roman Numerals (2014)
Coding Dojo: Roman Numerals (2014)Coding Dojo: Roman Numerals (2014)
Coding Dojo: Roman Numerals (2014)
Peter Kofler
 
Coding Dojo: Bank OCR (2014)
Coding Dojo: Bank OCR (2014)Coding Dojo: Bank OCR (2014)
Coding Dojo: Bank OCR (2014)
Peter Kofler
 
Coding Dojo: String Calculator (2013)
Coding Dojo: String Calculator (2013)Coding Dojo: String Calculator (2013)
Coding Dojo: String Calculator (2013)
Peter Kofler
 
The Brutal Refactoring Game (2013)
The Brutal Refactoring Game (2013)The Brutal Refactoring Game (2013)
The Brutal Refactoring Game (2013)
Peter Kofler
 
Coding Dojo: Fun with Tic-Tac-Toe (2014)
Coding Dojo: Fun with Tic-Tac-Toe (2014)Coding Dojo: Fun with Tic-Tac-Toe (2014)
Coding Dojo: Fun with Tic-Tac-Toe (2014)
Peter Kofler
 

Similar to Refactoring the Tennis Kata (2013) (20)

TDD as if You Meant It (2013)
TDD as if You Meant It (2013)TDD as if You Meant It (2013)
TDD as if You Meant It (2013)
 
Brutal Coding Constraints (ITAKE 2017)
Brutal Coding Constraints (ITAKE 2017)Brutal Coding Constraints (ITAKE 2017)
Brutal Coding Constraints (ITAKE 2017)
 
Coding Dojo: Naming with Dices (2021)
Coding Dojo: Naming with Dices (2021)Coding Dojo: Naming with Dices (2021)
Coding Dojo: Naming with Dices (2021)
 
Coding Dojo: Asynchronous Clock-In (2016)
Coding Dojo: Asynchronous Clock-In (2016)Coding Dojo: Asynchronous Clock-In (2016)
Coding Dojo: Asynchronous Clock-In (2016)
 
Refactoring the Tennis Kata v2 (2016)
Refactoring the Tennis Kata v2 (2016)Refactoring the Tennis Kata v2 (2016)
Refactoring the Tennis Kata v2 (2016)
 
Coding Dojo: Adding Tests to Legacy Code (2014)
Coding Dojo: Adding Tests to Legacy Code (2014)Coding Dojo: Adding Tests to Legacy Code (2014)
Coding Dojo: Adding Tests to Legacy Code (2014)
 
Deliberate Practice (2014)
Deliberate Practice (2014)Deliberate Practice (2014)
Deliberate Practice (2014)
 
Coding Dojo: Baby Steps Push Challenge (2021)
Coding Dojo: Baby Steps Push Challenge (2021)Coding Dojo: Baby Steps Push Challenge (2021)
Coding Dojo: Baby Steps Push Challenge (2021)
 
Designing Test Cases for the Gilded Rose Kata v3 (2016)
Designing Test Cases for the Gilded Rose Kata v3 (2016)Designing Test Cases for the Gilded Rose Kata v3 (2016)
Designing Test Cases for the Gilded Rose Kata v3 (2016)
 
Coding Dojo: Baby Steps (2014)
Coding Dojo: Baby Steps (2014)Coding Dojo: Baby Steps (2014)
Coding Dojo: Baby Steps (2014)
 
Deliberate Practice (Agile Slovenia 2015)
Deliberate Practice (Agile Slovenia 2015)Deliberate Practice (Agile Slovenia 2015)
Deliberate Practice (Agile Slovenia 2015)
 
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
Coding Dojo for Testers/Testing Dojo: Designing Test Cases with FitNesse (2014)
 
Coding Dojo: Roman Numerals (2014)
Coding Dojo: Roman Numerals (2014)Coding Dojo: Roman Numerals (2014)
Coding Dojo: Roman Numerals (2014)
 
Designing Test Cases for the Gilded Rose Kata v2 (2015)
Designing Test Cases for the Gilded Rose Kata v2 (2015)Designing Test Cases for the Gilded Rose Kata v2 (2015)
Designing Test Cases for the Gilded Rose Kata v2 (2015)
 
Coding Dojo: Bank OCR (2014)
Coding Dojo: Bank OCR (2014)Coding Dojo: Bank OCR (2014)
Coding Dojo: Bank OCR (2014)
 
Coding Dojo: String Calculator (2013)
Coding Dojo: String Calculator (2013)Coding Dojo: String Calculator (2013)
Coding Dojo: String Calculator (2013)
 
The Brutal Refactoring Game (2013)
The Brutal Refactoring Game (2013)The Brutal Refactoring Game (2013)
The Brutal Refactoring Game (2013)
 
Clean Readable Specifications (ETC 2016)
Clean Readable Specifications (ETC 2016)Clean Readable Specifications (ETC 2016)
Clean Readable Specifications (ETC 2016)
 
Coding Dojo: Data Munging (2016)
Coding Dojo: Data Munging (2016)Coding Dojo: Data Munging (2016)
Coding Dojo: Data Munging (2016)
 
Coding Dojo: Fun with Tic-Tac-Toe (2014)
Coding Dojo: Fun with Tic-Tac-Toe (2014)Coding Dojo: Fun with Tic-Tac-Toe (2014)
Coding Dojo: Fun with Tic-Tac-Toe (2014)
 

More from Peter Kofler

Coding Dojo: Mars Rover (2014)
Coding Dojo: Mars Rover (2014)Coding Dojo: Mars Rover (2014)
Coding Dojo: Mars Rover (2014)
Peter Kofler
 
Code Refactoring - Live Coding Demo (JavaDay 2014)
Code Refactoring - Live Coding Demo (JavaDay 2014)Code Refactoring - Live Coding Demo (JavaDay 2014)
Code Refactoring - Live Coding Demo (JavaDay 2014)
Peter Kofler
 

More from Peter Kofler (17)

Writing Tests with the Unity Test Framework
Writing Tests with the Unity Test FrameworkWriting Tests with the Unity Test Framework
Writing Tests with the Unity Test Framework
 
Outside-in Test Driven Development - the London School of TDD
Outside-in Test Driven Development - the London School of TDDOutside-in Test Driven Development - the London School of TDD
Outside-in Test Driven Development - the London School of TDD
 
Using Automated Code Reviews to Achieve Continuous Quality (ASQF Agile Night ...
Using Automated Code Reviews to Achieve Continuous Quality (ASQF Agile Night ...Using Automated Code Reviews to Achieve Continuous Quality (ASQF Agile Night ...
Using Automated Code Reviews to Achieve Continuous Quality (ASQF Agile Night ...
 
Pragmatic Introduction to Python Unit Testing (PyDays 2018)
Pragmatic Introduction to Python Unit Testing (PyDays 2018)Pragmatic Introduction to Python Unit Testing (PyDays 2018)
Pragmatic Introduction to Python Unit Testing (PyDays 2018)
 
Coding Dojo Object Calisthenics (2016)
Coding Dojo Object Calisthenics (2016)Coding Dojo Object Calisthenics (2016)
Coding Dojo Object Calisthenics (2016)
 
Mob Programming (2016)
Mob Programming (2016)Mob Programming (2016)
Mob Programming (2016)
 
Code Retreat Venice (2016)
Code Retreat Venice (2016)Code Retreat Venice (2016)
Code Retreat Venice (2016)
 
JUnit Boot Camp (GeeCON 2016)
JUnit Boot Camp (GeeCON 2016)JUnit Boot Camp (GeeCON 2016)
JUnit Boot Camp (GeeCON 2016)
 
Extract Method Refactoring Workshop (2016)
Extract Method Refactoring Workshop (2016)Extract Method Refactoring Workshop (2016)
Extract Method Refactoring Workshop (2016)
 
Coding Dojo: Functional Calisthenics (2016)
Coding Dojo: Functional Calisthenics (2016)Coding Dojo: Functional Calisthenics (2016)
Coding Dojo: Functional Calisthenics (2016)
 
GDCR15 in Las Palmas, Gran Canaria
GDCR15 in Las Palmas, Gran CanariaGDCR15 in Las Palmas, Gran Canaria
GDCR15 in Las Palmas, Gran Canaria
 
Pair Programming (2015)
Pair Programming (2015)Pair Programming (2015)
Pair Programming (2015)
 
Coding Dojo: Bank OCR Outside-In (2015)
Coding Dojo: Bank OCR Outside-In (2015)Coding Dojo: Bank OCR Outside-In (2015)
Coding Dojo: Bank OCR Outside-In (2015)
 
Deliberate Practice, New Learning Styles (2015)
Deliberate Practice, New Learning Styles (2015)Deliberate Practice, New Learning Styles (2015)
Deliberate Practice, New Learning Styles (2015)
 
Pragmatic Introduction to PHP Unit Testing (2015)
Pragmatic Introduction to PHP Unit Testing (2015)Pragmatic Introduction to PHP Unit Testing (2015)
Pragmatic Introduction to PHP Unit Testing (2015)
 
Coding Dojo: Mars Rover (2014)
Coding Dojo: Mars Rover (2014)Coding Dojo: Mars Rover (2014)
Coding Dojo: Mars Rover (2014)
 
Code Refactoring - Live Coding Demo (JavaDay 2014)
Code Refactoring - Live Coding Demo (JavaDay 2014)Code Refactoring - Live Coding Demo (JavaDay 2014)
Code Refactoring - Live Coding Demo (JavaDay 2014)
 

Recently uploaded

Artificial Intelligence: Facts and Myths
Artificial Intelligence: Facts and MythsArtificial Intelligence: Facts and Myths
Artificial Intelligence: Facts and Myths
Joaquim Jorge
 

Recently uploaded (20)

GenAI Risks & Security Meetup 01052024.pdf
GenAI Risks & Security Meetup 01052024.pdfGenAI Risks & Security Meetup 01052024.pdf
GenAI Risks & Security Meetup 01052024.pdf
 
Mastering MySQL Database Architecture: Deep Dive into MySQL Shell and MySQL R...
Mastering MySQL Database Architecture: Deep Dive into MySQL Shell and MySQL R...Mastering MySQL Database Architecture: Deep Dive into MySQL Shell and MySQL R...
Mastering MySQL Database Architecture: Deep Dive into MySQL Shell and MySQL R...
 
A Domino Admins Adventures (Engage 2024)
A Domino Admins Adventures (Engage 2024)A Domino Admins Adventures (Engage 2024)
A Domino Admins Adventures (Engage 2024)
 
How to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected WorkerHow to Troubleshoot Apps for the Modern Connected Worker
How to Troubleshoot Apps for the Modern Connected Worker
 
Tata AIG General Insurance Company - Insurer Innovation Award 2024
Tata AIG General Insurance Company - Insurer Innovation Award 2024Tata AIG General Insurance Company - Insurer Innovation Award 2024
Tata AIG General Insurance Company - Insurer Innovation Award 2024
 
Automating Google Workspace (GWS) & more with Apps Script
Automating Google Workspace (GWS) & more with Apps ScriptAutomating Google Workspace (GWS) & more with Apps Script
Automating Google Workspace (GWS) & more with Apps Script
 
Artificial Intelligence: Facts and Myths
Artificial Intelligence: Facts and MythsArtificial Intelligence: Facts and Myths
Artificial Intelligence: Facts and Myths
 
Axa Assurance Maroc - Insurer Innovation Award 2024
Axa Assurance Maroc - Insurer Innovation Award 2024Axa Assurance Maroc - Insurer Innovation Award 2024
Axa Assurance Maroc - Insurer Innovation Award 2024
 
Apidays New York 2024 - The value of a flexible API Management solution for O...
Apidays New York 2024 - The value of a flexible API Management solution for O...Apidays New York 2024 - The value of a flexible API Management solution for O...
Apidays New York 2024 - The value of a flexible API Management solution for O...
 
Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...
Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...
Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...
 
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law DevelopmentsTrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
TrustArc Webinar - Stay Ahead of US State Data Privacy Law Developments
 
Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024
Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024
Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024
 
MINDCTI Revenue Release Quarter One 2024
MINDCTI Revenue Release Quarter One 2024MINDCTI Revenue Release Quarter One 2024
MINDCTI Revenue Release Quarter One 2024
 
Top 10 Most Downloaded Games on Play Store in 2024
Top 10 Most Downloaded Games on Play Store in 2024Top 10 Most Downloaded Games on Play Store in 2024
Top 10 Most Downloaded Games on Play Store in 2024
 
From Event to Action: Accelerate Your Decision Making with Real-Time Automation
From Event to Action: Accelerate Your Decision Making with Real-Time AutomationFrom Event to Action: Accelerate Your Decision Making with Real-Time Automation
From Event to Action: Accelerate Your Decision Making with Real-Time Automation
 
Boost PC performance: How more available memory can improve productivity
Boost PC performance: How more available memory can improve productivityBoost PC performance: How more available memory can improve productivity
Boost PC performance: How more available memory can improve productivity
 
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
Apidays Singapore 2024 - Building Digital Trust in a Digital Economy by Veron...
 
HTML Injection Attacks: Impact and Mitigation Strategies
HTML Injection Attacks: Impact and Mitigation StrategiesHTML Injection Attacks: Impact and Mitigation Strategies
HTML Injection Attacks: Impact and Mitigation Strategies
 
Understanding Discord NSFW Servers A Guide for Responsible Users.pdf
Understanding Discord NSFW Servers A Guide for Responsible Users.pdfUnderstanding Discord NSFW Servers A Guide for Responsible Users.pdf
Understanding Discord NSFW Servers A Guide for Responsible Users.pdf
 
Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood
Polkadot JAM Slides - Token2049 - By Dr. Gavin WoodPolkadot JAM Slides - Token2049 - By Dr. Gavin Wood
Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood
 

Refactoring the Tennis Kata (2013)

  • 1. Coding Dojo: Refactoring the Tennis Kata Agile Testing Days 2013 Peter Kofler, ‘Code Cop’ @codecopkofler www.code-cop.org Copyright Peter Kofler, licensed under CC-BY.
  • 2. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler • Software Developer for 14 years • “fanatic about code quality” • I help development teams to do it right • Pair Programming #CodeCopTour
  • 4. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Coding Dojo Mindset ● Safe place outside work ● We are here to learn ● Need to slow down ● Focus on doing it right ● Collaborative Game
  • 5. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Dojo Structure ● Introduction 15' ● Coding 30' ● Interim (Retrospective) 15' ● Break 25' ● Coding 45' ● Retrospective 15'
  • 6. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY TDD Skills ● Driving Development with Tests ● Designing Test Cases ● Designing Clean Code ● Refactoring Safely 
  • 7. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Scoring in Tennis Game
  • 8. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Requirements ● Get the code https://github.com/codecop/Tennis-Kata-ATD2013 ● ● ● Focus entirely on Clean-up Refactor in small steps ● Experiment with approaches Run tests often
  • 9. Don't Focus on Getting it Done. F0cus on Doing It Perfectly.
  • 11. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Closing Circle ● What did you learn today? ● What surprised you today? ● What will you do differently in the future?
  • 12. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Please evaluate my presentation using the AgileTD Mobile App at www.touchmyconference.com/ATD2013 I appreciate your feedback.
  • 13. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler @codecopkofler www.code-cop.org Kata by Emily Bache @emilybache http://emilybache.blogspot.co.at/2011/08/refactoring-kata-fun.html
  • 14. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY CC Images ● Dojo http://www.flickr.com/photos/49715404@N00/3267627038/ ● Todos http://www.flickr.com/photos/kylesteeddesign/3724074594/ ● Tennis http://www.flickr.com/photos/gagillphoto/3706167856/ ● Wants you http://www.flickr.com/photos/shutter/105497713/