Uploaded bychzy
KEY, PDF548 views

Presentation for Pittsburgh Agile Group

The document is a presentation on test-driven development (TDD). It defines TDD, explains why TDD works by creating testable code and minimizing defects, and promotes better design. The presentation notes that TDD was devised by Ward Cunningham and incorporated into extreme programming (XP). It outlines the core TDD cycle and rules, demonstrating how writing tests first results in isolated, well-designed code and comprehensive documentation.

Embed presentation

Downloaded 13 times
Test Driven Development Pittsburgh Agile Group May 24, 2011 Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
What is TDD? Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
What is TDD? • Simple, high-feedback incremental coding technique Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
What is TDD? • Simple, high-feedback incremental coding technique • Write tests as specs prior to code Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
What is TDD? • Simple, high-feedback incremental coding technique • Write tests as specs prior to code • Immediate feedback Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Core of the cycle Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming • Test-first design Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
History of TDD • Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming • Test-first design • Test-driven development Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing • Creates testable code by definition Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing • Creates testable code by definition • Obvious but significant Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing • Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing • Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder • Therefore fewer tests get written Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD and Testing • Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder • Therefore fewer tests get written • Minimizes defects Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
More Importantly... Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
More Importantly... • Promotes better design Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
More Importantly... • Promotes better design • Teaches you how to design isolated classes Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
More Importantly... • Promotes better design • Teaches you how to design isolated classes • Creates comprehensive developer documentation Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
More Importantly... • Promotes better design • Teaches you how to design isolated classes • Creates comprehensive developer documentation • Development Pacing Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD Rules Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD Rules • Test everything that could possibly break Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD Rules • Test everything that could possibly break • Do not write any production code until you have a failing test Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
TDD Rules • Test everything that could possibly break • Do not write any production code until you have a failing test • Code is not checked in until 100% of unit tests run Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Why does it work? Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Why does it work? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Why does it work? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Why does it work? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Long Methods Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Long Methods Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Many Dependencies Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Many Dependencies Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Doing too much Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Doing too much Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Keep it clean Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Keep it clean Pleasure Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Feel good Pleasure Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Fewer Defects http://research.microsoft.com/en-us/projects/esm/ nagappan_tdd.pdf Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Professionalism Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Demo Time Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Final Thoughts Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Final Thoughts • TDD is here to stay Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Final Thoughts • TDD is here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Final Thoughts • TDD is here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application • Diligent adherence to practice is required to succeed Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Final Thoughts • TDD is here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application • Diligent adherence to practice is required to succeed • But the benefits are worth it Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
Presentation for Pittsburgh Agile Group

More Related Content

KEY
The business case for contributing code
byZivtech, LLC
 
KEY
Acceptance testfurureinmind
byLeanDog
 
PPTX
You've Decided to Use HTML5. Now What?
byAppnovation Technologies
 
PDF
Achieving Continuous Delivery with Puppet
byDevoteam Revolve
 
PPTX
BDD & Beyond: The Past, Present, & Future of Test Automation
byFord Prior
 
PDF
Building and Scaling High Performing Technology Organizations by Jez Humble a...
byAgile India
 
PDF
Deliver Fast with Confidence
byDevCamp Campinas
 
PDF
A Business Case for Git - Tim Pettersen
byAtlassian
 
The business case for contributing code
byZivtech, LLC
 
Acceptance testfurureinmind
byLeanDog
 
You've Decided to Use HTML5. Now What?
byAppnovation Technologies
 
Achieving Continuous Delivery with Puppet
byDevoteam Revolve
 
BDD & Beyond: The Past, Present, & Future of Test Automation
byFord Prior
 
Building and Scaling High Performing Technology Organizations by Jez Humble a...
byAgile India
 
Deliver Fast with Confidence
byDevCamp Campinas
 
A Business Case for Git - Tim Pettersen
byAtlassian
 

What's hot

PDF
DevoxxUK 2019 - Better software, faster.
byBert Jan Schrijver
 
PPTX
Establishing Release Quality Levels and Release Acceptance Tests
byConteneo Inc.
 
PDF
AmsterdamJUG September 2019 - Better software, faster: Principles of Continuo...
byBert Jan Schrijver
 
PDF
CodeOne 2018 - Better software, faster: principles of Continuous Delivery and...
byBert Jan Schrijver
 
PDF
OpenValue Vienna meetup september 2020 - Better software, faster: Principles ...
byBert Jan Schrijver
 
PPT
Bridging the Distance through Agile Game Development
byFinnur Magnusson
 
PDF
Devoxx Belgium 2019 - Better software, faster: Principles of Continuous Deliv...
byBert Jan Schrijver
 
DevoxxUK 2019 - Better software, faster.
byBert Jan Schrijver
 
Establishing Release Quality Levels and Release Acceptance Tests
byConteneo Inc.
 
AmsterdamJUG September 2019 - Better software, faster: Principles of Continuo...
byBert Jan Schrijver
 
CodeOne 2018 - Better software, faster: principles of Continuous Delivery and...
byBert Jan Schrijver
 
OpenValue Vienna meetup september 2020 - Better software, faster: Principles ...
byBert Jan Schrijver
 
Bridging the Distance through Agile Game Development
byFinnur Magnusson
 
Devoxx Belgium 2019 - Better software, faster: Principles of Continuous Deliv...
byBert Jan Schrijver
 

Viewers also liked

PDF
30.05
bysknsz
 
PDF
Web vn
byAnam
 
PDF
Shrinivas kulkarni Testing is Dead
byvodQA
 
DOC
Java getstarted
byNobin নবীন
 
PPTX
Hallgrímur pétursson
bysverrirs2859
 
PDF
Pc world spain julio agosto 2013
bySystech Asesores en Tecnologia
 
PPTX
Optiprint 3D Print Eyeglasses Patricia Durán Ospina
byUniversidad Técnica de Manabí
 
PDF
Web ve
byAnam
 
PPTX
Lookbook Cloud (Facebook slideshow with multiple hotspots app) user guide
byAlex Levashov
 
PPTX
Rola polskiej prezydencji
bysknsz
 
PPTX
Drugi dzień przeglądu filmów dokumentalnych z międzynarodowego festiwalu
bysknsz
 
PPT
Photo presentation
bymheberle04
 
PPT
Oporrak!
byander2234
 
PPTX
A window between worlds
byKristy
 
PPTX
Ettkanne 13.sept.2013
byMargus Ots
 
PPTX
Barnes &noble
byDeepavali Vankalu
 
PPT
Financial crisis done
byEly Twiggs
 
PPT
2010 New Products
byledindex
 
PDF
Pooderniercours
byAmel Morchdi
 
PDF
Llista provisional d'inscrits vn'12
byAnam
 
30.05
bysknsz
 
Web vn
byAnam
 
Shrinivas kulkarni Testing is Dead
byvodQA
 
Java getstarted
byNobin নবীন
 
Hallgrímur pétursson
bysverrirs2859
 
Pc world spain julio agosto 2013
bySystech Asesores en Tecnologia
 
Optiprint 3D Print Eyeglasses Patricia Durán Ospina
byUniversidad Técnica de Manabí
 
Web ve
byAnam
 
Lookbook Cloud (Facebook slideshow with multiple hotspots app) user guide
byAlex Levashov
 
Rola polskiej prezydencji
bysknsz
 
Drugi dzień przeglądu filmów dokumentalnych z międzynarodowego festiwalu
bysknsz
 
Photo presentation
bymheberle04
 
Oporrak!
byander2234
 
A window between worlds
byKristy
 
Ettkanne 13.sept.2013
byMargus Ots
 
Barnes &noble
byDeepavali Vankalu
 
Financial crisis done
byEly Twiggs
 
2010 New Products
byledindex
 
Pooderniercours
byAmel Morchdi
 
Llista provisional d'inscrits vn'12
byAnam
 

Similar to Presentation for Pittsburgh Agile Group

KEY
Cucumber & Cheese
bychzy
 
KEY
ATDD - Agile Testing
bychzy
 
PDF
Patterns of Automation: Simplify Your Test Code
byTechWell
 
PDF
Agile Testing: It’s a Team Sport
byTechWell
 
PPTX
Test Driven Development on Android (Kotlin Kenya)
byDanny Preussler
 
PPTX
Understanding TDD - theory, practice, techniques and tips.
byMalinda Kapuruge
 
PPTX
TDD in Agile
byAtish Narlawar
 
KEY
Getting Comfortable with BDD
byAlex Sharp
 
PDF
Test Driven Development Methodology and Philosophy
byVijay Kumbhar
 
PDF
Introducing TDD to your project
byBastian Feder
 
PDF
Tdd practices
byaxykim00
 
PDF
Test Driven Development Introduction
byNguyen Hai
 
PDF
An Introduction to Test Driven Development
byCodeOps Technologies LLP
 
PDF
Getting started with Test Driven Development
byFerdous Mahmud Shaon
 
ODP
Effective TDD - Less is more
byBen Lau
 
KEY
Driving application development through behavior driven development
byEinar Ingebrigtsen
 
PPTX
Getting started with Test Driven Development - Ferdous Mahmud Shaon
byCefalo
 
PDF
Research Activities: past, present, and future.
byMarco Torchiano
 
PPTX
Tdd and bdd
byMohamedSubhiBouchi
 
PDF
TDD and Simple Design Workshop - Session 1 - March 2019
byPaulo Clavijo
 
Cucumber & Cheese
bychzy
 
ATDD - Agile Testing
bychzy
 
Patterns of Automation: Simplify Your Test Code
byTechWell
 
Agile Testing: It’s a Team Sport
byTechWell
 
Test Driven Development on Android (Kotlin Kenya)
byDanny Preussler
 
Understanding TDD - theory, practice, techniques and tips.
byMalinda Kapuruge
 
TDD in Agile
byAtish Narlawar
 
Getting Comfortable with BDD
byAlex Sharp
 
Test Driven Development Methodology and Philosophy
byVijay Kumbhar
 
Introducing TDD to your project
byBastian Feder
 
Tdd practices
byaxykim00
 
Test Driven Development Introduction
byNguyen Hai
 
An Introduction to Test Driven Development
byCodeOps Technologies LLP
 
Getting started with Test Driven Development
byFerdous Mahmud Shaon
 
Effective TDD - Less is more
byBen Lau
 
Driving application development through behavior driven development
byEinar Ingebrigtsen
 
Getting started with Test Driven Development - Ferdous Mahmud Shaon
byCefalo
 
Research Activities: past, present, and future.
byMarco Torchiano
 
Tdd and bdd
byMohamedSubhiBouchi
 
TDD and Simple Design Workshop - Session 1 - March 2019
byPaulo Clavijo
 

Recently uploaded

PDF
ICT500 - CRITICAL AND CREATIVE THINKING FOR INFORMATION TECHNOLOGY SOLUTIONS:...
by2024432452
 
PPTX
Cyber security chapter 1 for learning and educating to the students who want ...
byGulMohammadi
 
PDF
Supercharge Your Copilot-Driven Collaboration with Microsoft 365 Agents SDK
byAntti Koskela
 
PPTX
NTG - Data Center Management System Software
byMustafa Kuğu
 
PDF
TrustArc Webinar - From Zero to Privacy Hero: Launching Your Program Right an...
byTrustArc
 
PDF
Taxonomy Alignment for SDG Tagging - ASHA Case Study
byEnterprise Knowledge
 
PPTX
TechSprint Inauguration at SJB Institute of Technology held on 18 December 2025
bysuhasspgdg
 
PDF
Bettersize | BeSEC Series Product Brochure
byBettersize Instruments
 
PDF
What Thema can do: Leveraging metadata to support the discoverability of Firs...
byBookNet Canada
 
PDF
7 Essential Types of Penetration Testing Services Every Business Should Under...
bypandeydevika621
 
PDF
Parental Control App for Phones_ The Complete 2026 Guide for Safer, Smarter P...
byRyan Cooper
 
PDF
Real-Time AI Masterclass: Vector Search at Scale
byScyllaDB
 
PPTX
Introduction to Industrial-Arts Grade 8 ppt Lesson 1
byFSBTLEDNathanVince
 
PDF
OpenCharacter AI Reviews: Features, Plans, and Best Alternative
byOpenCharacter AI
 
PDF
Adapt.com Seed Fundraising Deck | The AI Computer for Business
byashley459565
 
PDF
CI CD Observability, Metrics and DORA - Shifting Left and Cleaning Up! - Febr...
byPeter Souter
 
PDF
Title Installing Windows, Linux, MacOS.pdf
byGeraldAbadajos
 
PDF
Dev Dives: Build and deploy agentic automations - the unified way
byUiPathCommunity
 
PPTX
Introduction to Artificial Intelligence (AI).pptx
byammar414783
 
PDF
Computer-Based Training (CBT) The Backbone of Modern Technical & Defence Trai...
bycomputerbasedtrainin1
 
ICT500 - CRITICAL AND CREATIVE THINKING FOR INFORMATION TECHNOLOGY SOLUTIONS:...
by2024432452
 
Cyber security chapter 1 for learning and educating to the students who want ...
byGulMohammadi
 
Supercharge Your Copilot-Driven Collaboration with Microsoft 365 Agents SDK
byAntti Koskela
 
NTG - Data Center Management System Software
byMustafa Kuğu
 
TrustArc Webinar - From Zero to Privacy Hero: Launching Your Program Right an...
byTrustArc
 
Taxonomy Alignment for SDG Tagging - ASHA Case Study
byEnterprise Knowledge
 
TechSprint Inauguration at SJB Institute of Technology held on 18 December 2025
bysuhasspgdg
 
Bettersize | BeSEC Series Product Brochure
byBettersize Instruments
 
What Thema can do: Leveraging metadata to support the discoverability of Firs...
byBookNet Canada
 
7 Essential Types of Penetration Testing Services Every Business Should Under...
bypandeydevika621
 
Parental Control App for Phones_ The Complete 2026 Guide for Safer, Smarter P...
byRyan Cooper
 
Real-Time AI Masterclass: Vector Search at Scale
byScyllaDB
 
Introduction to Industrial-Arts Grade 8 ppt Lesson 1
byFSBTLEDNathanVince
 
OpenCharacter AI Reviews: Features, Plans, and Best Alternative
byOpenCharacter AI
 
Adapt.com Seed Fundraising Deck | The AI Computer for Business
byashley459565
 
CI CD Observability, Metrics and DORA - Shifting Left and Cleaning Up! - Febr...
byPeter Souter
 
Title Installing Windows, Linux, MacOS.pdf
byGeraldAbadajos
 
Dev Dives: Build and deploy agentic automations - the unified way
byUiPathCommunity
 
Introduction to Artificial Intelligence (AI).pptx
byammar414783
 
Computer-Based Training (CBT) The Backbone of Modern Technical & Defence Trai...
bycomputerbasedtrainin1
 

Presentation for Pittsburgh Agile Group

  • 1.
    Test Driven Development PittsburghAgile Group May 24, 2011 Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 2.
    Our Tests It ==This Presentation Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 3.
    Our Tests It == This Presentation • it should define TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 4.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 5.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 6.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 7.
    What is TDD? Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 8.
    What is TDD? •Simple, high-feedback incremental coding technique Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 9.
    What is TDD? •Simple, high-feedback incremental coding technique • Write tests as specs prior to code Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 10.
    What is TDD? •Simple, high-feedback incremental coding technique • Write tests as specs prior to code • Immediate feedback Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 11.
    Core of thecycle Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 12.
    History of TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 13.
    History of TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 14.
    History of TDD •Devised by Ward Cunningham Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 15.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 16.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 17.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 18.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 19.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming • Test-first design Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 20.
    History of TDD •Devised by Ward Cunningham • Honed by Kent Beck • Incorporated as one of XP’s practices • Buzzword History • Test-first programming • Test-first design • Test-driven development Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 21.
    TDD and Testing Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 22.
    TDD and Testing •Creates testable code by definition Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 23.
    TDD and Testing •Creates testable code by definition • Obvious but significant Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 24.
    TDD and Testing •Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 25.
    TDD and Testing •Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder • Therefore fewer tests get written Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 26.
    TDD and Testing •Creates testable code by definition • Obvious but significant • Writing tests after code built is much harder • Therefore fewer tests get written • Minimizes defects Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 27.
    More Importantly... Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 28.
    More Importantly... • Promotesbetter design Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 29.
    More Importantly... • Promotesbetter design • Teaches you how to design isolated classes Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 30.
    More Importantly... • Promotesbetter design • Teaches you how to design isolated classes • Creates comprehensive developer documentation Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 31.
    More Importantly... • Promotesbetter design • Teaches you how to design isolated classes • Creates comprehensive developer documentation • Development Pacing Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 32.
    TDD Rules Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 33.
    TDD Rules • Testeverything that could possibly break Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 34.
    TDD Rules • Testeverything that could possibly break • Do not write any production code until you have a failing test Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 35.
    TDD Rules • Testeverything that could possibly break • Do not write any production code until you have a failing test • Code is not checked in until 100% of unit tests run Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 36.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 37.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 38.
    Why does itwork? Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 39.
    Why does itwork? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 40.
    Why does itwork? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 41.
    Why does itwork? Pleasure spiked with Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 42.
    Long Methods Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 43.
    Long Methods Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 44.
    Many Dependencies Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 45.
    Many Dependencies Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 46.
    Doing too much Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 47.
    Doing too much Pain! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 48.
    Keep it clean Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 49.
    Keep it clean Pleasure Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 50.
    Feel good Pleasure Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 51.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 52.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 53.
    Nature ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 54.
    Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 55.
    Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 56.
    Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 57.
    Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 58.
    Nature X ^ F T> Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 59.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 60.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 61.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 62.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 63.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 64.
    Design Evolves Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 65.
    Fewer Defects http://research.microsoft.com/en-us/projects/esm/ nagappan_tdd.pdf Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 66.
    We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 67.
    We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 68.
    We Do Scrum! Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 69.
    Professionalism Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 70.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 71.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 72.
    Demo Time Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 73.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 74.
    Our Tests It == This Presentation • it should define TDD • it should explain why TDD works • it should explain why you should do TDD • it should demonstrate TDD Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 75.
    Final Thoughts Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 76.
    Final Thoughts • TDDis here to stay Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 77.
    Final Thoughts • TDDis here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 78.
    Final Thoughts • TDDis here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application • Diligent adherence to practice is required to succeed Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.
  • 79.
    Final Thoughts • TDDis here to stay • A satisfying and enriching practice that can dramatically increase the quality of your application • Diligent adherence to practice is required to succeed • But the benefits are worth it Copyright 2011 LeanDog, Inc. All Rights Reserved. Do not copy or distribute without permission.

Editor's Notes