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The Ultimate Developer Collaboration Technique PING PONG PAIR PROGRAMMING Anthony Sciamanna @asciamanna Nick Goede @ngoede Heart of Agile Pittsburgh – April 27, 2017

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Nick Anthony 2008 2005 Acquisition - 2013 Early 2014 Nine years of experience working together, practicing and coaching teams on XP XP Organization 2000

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The Problem

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Pair Programming is really interesting, everybody talks about it but no one does it. - Bryan Helmkamp, Founder and CEO Code Climate, Baruco 2013 “

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Traditional Pair Programming Challenges What we’ve heard…

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I never get to type!

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Whenever I am driving my pair just looks at their phone.

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I can’t ever get into flow when pairing.

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Talking about everything I’m doing slows me down.

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Developers new to TDD & pair programming think they have to solve the big problems before they start pairing

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Programming By Coincidence AKA Debugger Driven Development

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Ping Pong Pair Programming

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Pair Programming Test-Driven Development Ping Pong Pair Programming

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2. Write only enough production code to make the test pass 1. Create a failing unit test (not compiling counts as a failing test) 3. Refactor only when all unit tests are passing Ping Pong Pair Programming

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Nick Anthony Writes a failing test Makes the test pass Writes the next failing test Makes the next test pass Only when all tests pass either person can refactor Continue until both people agree there are no more tests to write

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Solutions

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I never get to type!

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Whenever I am driving my pair just looks at their phone.

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I can’t ever get into flow when pairing.

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Talking about everything I’m doing will slow me down.

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DEMO The Bill Payer App Allows users to view, manage, and autopay their bills

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USER STORY As a bill payer I want my mortgage bill paid on its due date or the first business day after its due date (when it falls on a non- business day), so that I can maximize the time that I keep my money in my account without incurring penalties

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Anthony https://youtu.be/WZsLNrnS4yk

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Nick https://youtu.be/WujNniqzf9U

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Anthony https://youtu.be/OoSvlJv24hE

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Nick https://youtu.be/Kl6UbPtJNGo

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Anthony https://youtu.be/kUkD_Ak6PLc

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Nick https://youtu.be/5VEuhMLS_Mk

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USER STORY As a bill payer I want my water bill paid on its due date or the first business day before its due date (when it falls on a non-business day), so that I can maximize the time that I keep my money in my account without incurring penalties

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Anthony https://youtu.be/6coH9P0Yuxg

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Nick https://youtu.be/CSzFSzsKaXM

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Anthony https://youtu.be/1gfihiwx8dw

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Nick https://youtu.be/4SfL6WWsCjo

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Nick https://youtu.be/1eFAMNBStCo

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Anthony https://youtu.be/P_u5OWjAcWo

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Try Ping Pong Pair Programming!

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CONTACT US! We love talking about Agile Software Development, XP, developer practices, helping development teams improve how they work and their code, etc. Nick Goede @ngoede [email protected] http://nickgoede.com Anthony Sciamanna @asciamanna [email protected] http://anthonysciamanna.com Github Repo – Each Step of Ping Pong Pair Programming Demo https://github.com/asciamanna/ping-pong-pair-programming-talk