SlideShare a Scribd company logo
Mocks, Stubs, Fakes
Dummies and Spies
Raphael Almeida
Who Am I?
Raphael Almeida
Developer since 2006
Co-founder of PHPRio, DojoRio,
RubyOnRio …
Community-a-holic
Double Objects
Type of Verifications
Best Practices
Double Objects: Simplist test
Double Objects: Awkward test
Double Objects: Types
Dummies
Fakes
Stubs
Spies
Mocks
Dummies
Used whenever we need to
pass irrelevant or never
used arguments only to
respect the method
signature
Dummies
Fakes
Simplified implementation
of a real method
Fakes
Stubs
Provide canned responses to calls made during the test
Stubs
Spies
Stubs that also record some
information based on how
they were called
Spies
Mocks
Pre-programmed objects
with expectations which
form a specification of the
calls they are expected to
receive
Mocks
Double Objects
Type of Verifications
Best Practices
Types of Verifications
State or Behaviour
Verifying State
We inspect the state of the tested object after it has been
exercised and compare it to the expected state
Verifying Behaviour
We capture the indirect output of the tested object as they
occur and compare them to the expected behavior
Double Objects
Type of Verifications
Best Practices
Best Practices
Don’t mock values
Verify the context (easy or awkward)
Use Fixtures with parsimony
Coupling test to implementations
References
https://martinfowler.com/articles/mocksArentStubs.html
https://github.com/padraic/mockery
https://github.com/php-vcr/php-vcr
XUnit Test Patterns - Gerard Meszaros
Thank you
Raphael Almeida
@raph_almeida

More Related Content

More from Raphael Almeida

Anatomia de um ataque
Anatomia de um ataqueAnatomia de um ataque
Anatomia de um ataque
Raphael Almeida
 
Arquitetura de microsserviços
Arquitetura  de  microsserviçosArquitetura  de  microsserviços
Arquitetura de microsserviços
Raphael Almeida
 
PaaS em php
PaaS em phpPaaS em php
PaaS em php
Raphael Almeida
 
Webinar php extreme 5.3
Webinar php extreme 5.3Webinar php extreme 5.3
Webinar php extreme 5.3
Raphael Almeida
 
Prepare-se para o próximo estágio da evolução PHP
Prepare-se para o próximo estágio da evolução PHPPrepare-se para o próximo estágio da evolução PHP
Prepare-se para o próximo estágio da evolução PHP
Raphael Almeida
 
Aplicativos sociais
Aplicativos sociaisAplicativos sociais
Aplicativos sociais
Raphael Almeida
 

More from Raphael Almeida (6)

Anatomia de um ataque
Anatomia de um ataqueAnatomia de um ataque
Anatomia de um ataque
 
Arquitetura de microsserviços
Arquitetura  de  microsserviçosArquitetura  de  microsserviços
Arquitetura de microsserviços
 
PaaS em php
PaaS em phpPaaS em php
PaaS em php
 
Webinar php extreme 5.3
Webinar php extreme 5.3Webinar php extreme 5.3
Webinar php extreme 5.3
 
Prepare-se para o próximo estágio da evolução PHP
Prepare-se para o próximo estágio da evolução PHPPrepare-se para o próximo estágio da evolução PHP
Prepare-se para o próximo estágio da evolução PHP
 
Aplicativos sociais
Aplicativos sociaisAplicativos sociais
Aplicativos sociais
 

Recently uploaded

Oracle 23c New Features For DBAs and Developers.pptx
Oracle 23c New Features For DBAs and Developers.pptxOracle 23c New Features For DBAs and Developers.pptx
Oracle 23c New Features For DBAs and Developers.pptx
Remote DBA Services
 
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
Paul Brebner
 
Preparing Non - Technical Founders for Engaging a Tech Agency
Preparing Non - Technical Founders for Engaging  a  Tech AgencyPreparing Non - Technical Founders for Engaging  a  Tech Agency
Preparing Non - Technical Founders for Engaging a Tech Agency
ISH Technologies
 
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSISDECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
Tier1 app
 
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdfBaha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
Baha Majid
 
Measures in SQL (SIGMOD 2024, Santiago, Chile)
Measures in SQL (SIGMOD 2024, Santiago, Chile)Measures in SQL (SIGMOD 2024, Santiago, Chile)
Measures in SQL (SIGMOD 2024, Santiago, Chile)
Julian Hyde
 
DevOps Consulting Company | Hire DevOps Services
DevOps Consulting Company | Hire DevOps ServicesDevOps Consulting Company | Hire DevOps Services
DevOps Consulting Company | Hire DevOps Services
seospiralmantra
 
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLESINTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
anfaltahir1010
 
What’s New in Odoo 17 – A Complete Roadmap
What’s New in Odoo 17 – A Complete RoadmapWhat’s New in Odoo 17 – A Complete Roadmap
What’s New in Odoo 17 – A Complete Roadmap
Envertis Software Solutions
 
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
kgyxske
 
Boost Your Savings with These Money Management Apps
Boost Your Savings with These Money Management AppsBoost Your Savings with These Money Management Apps
Boost Your Savings with These Money Management Apps
Jhone kinadey
 
Superpower Your Apache Kafka Applications Development with Complementary Open...
Superpower Your Apache Kafka Applications Development with Complementary Open...Superpower Your Apache Kafka Applications Development with Complementary Open...
Superpower Your Apache Kafka Applications Development with Complementary Open...
Paul Brebner
 
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptxOperational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
sandeepmenon62
 
Benefits of Artificial Intelligence in Healthcare!
Benefits of  Artificial Intelligence in Healthcare!Benefits of  Artificial Intelligence in Healthcare!
Benefits of Artificial Intelligence in Healthcare!
Prestware
 
What is Continuous Testing in DevOps - A Definitive Guide.pdf
What is Continuous Testing in DevOps - A Definitive Guide.pdfWhat is Continuous Testing in DevOps - A Definitive Guide.pdf
What is Continuous Testing in DevOps - A Definitive Guide.pdf
kalichargn70th171
 
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
Luigi Fugaro
 
Enums On Steroids - let's look at sealed classes !
Enums On Steroids - let's look at sealed classes !Enums On Steroids - let's look at sealed classes !
Enums On Steroids - let's look at sealed classes !
Marcin Chrost
 
Mobile App Development Company In Noida | Drona Infotech
Mobile App Development Company In Noida | Drona InfotechMobile App Development Company In Noida | Drona Infotech
Mobile App Development Company In Noida | Drona Infotech
Drona Infotech
 
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
safelyiotech
 
The Rising Future of CPaaS in the Middle East 2024
The Rising Future of CPaaS in the Middle East 2024The Rising Future of CPaaS in the Middle East 2024
The Rising Future of CPaaS in the Middle East 2024
Yara Milbes
 

Recently uploaded (20)

Oracle 23c New Features For DBAs and Developers.pptx
Oracle 23c New Features For DBAs and Developers.pptxOracle 23c New Features For DBAs and Developers.pptx
Oracle 23c New Features For DBAs and Developers.pptx
 
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
Why Apache Kafka Clusters Are Like Galaxies (And Other Cosmic Kafka Quandarie...
 
Preparing Non - Technical Founders for Engaging a Tech Agency
Preparing Non - Technical Founders for Engaging  a  Tech AgencyPreparing Non - Technical Founders for Engaging  a  Tech Agency
Preparing Non - Technical Founders for Engaging a Tech Agency
 
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSISDECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
DECODING JAVA THREAD DUMPS: MASTER THE ART OF ANALYSIS
 
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdfBaha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
Baha Majid WCA4Z IBM Z Customer Council Boston June 2024.pdf
 
Measures in SQL (SIGMOD 2024, Santiago, Chile)
Measures in SQL (SIGMOD 2024, Santiago, Chile)Measures in SQL (SIGMOD 2024, Santiago, Chile)
Measures in SQL (SIGMOD 2024, Santiago, Chile)
 
DevOps Consulting Company | Hire DevOps Services
DevOps Consulting Company | Hire DevOps ServicesDevOps Consulting Company | Hire DevOps Services
DevOps Consulting Company | Hire DevOps Services
 
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLESINTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
INTRODUCTION TO AI CLASSICAL THEORY TARGETED EXAMPLES
 
What’s New in Odoo 17 – A Complete Roadmap
What’s New in Odoo 17 – A Complete RoadmapWhat’s New in Odoo 17 – A Complete Roadmap
What’s New in Odoo 17 – A Complete Roadmap
 
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
一比一原版(sdsu毕业证书)圣地亚哥州立大学毕业证如何办理
 
Boost Your Savings with These Money Management Apps
Boost Your Savings with These Money Management AppsBoost Your Savings with These Money Management Apps
Boost Your Savings with These Money Management Apps
 
Superpower Your Apache Kafka Applications Development with Complementary Open...
Superpower Your Apache Kafka Applications Development with Complementary Open...Superpower Your Apache Kafka Applications Development with Complementary Open...
Superpower Your Apache Kafka Applications Development with Complementary Open...
 
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptxOperational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
Operational ease MuleSoft and Salesforce Service Cloud Solution v1.0.pptx
 
Benefits of Artificial Intelligence in Healthcare!
Benefits of  Artificial Intelligence in Healthcare!Benefits of  Artificial Intelligence in Healthcare!
Benefits of Artificial Intelligence in Healthcare!
 
What is Continuous Testing in DevOps - A Definitive Guide.pdf
What is Continuous Testing in DevOps - A Definitive Guide.pdfWhat is Continuous Testing in DevOps - A Definitive Guide.pdf
What is Continuous Testing in DevOps - A Definitive Guide.pdf
 
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
WMF 2024 - Unlocking the Future of Data Powering Next-Gen AI with Vector Data...
 
Enums On Steroids - let's look at sealed classes !
Enums On Steroids - let's look at sealed classes !Enums On Steroids - let's look at sealed classes !
Enums On Steroids - let's look at sealed classes !
 
Mobile App Development Company In Noida | Drona Infotech
Mobile App Development Company In Noida | Drona InfotechMobile App Development Company In Noida | Drona Infotech
Mobile App Development Company In Noida | Drona Infotech
 
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
Safelyio Toolbox Talk Softwate & App (How To Digitize Safety Meetings)
 
The Rising Future of CPaaS in the Middle East 2024
The Rising Future of CPaaS in the Middle East 2024The Rising Future of CPaaS in the Middle East 2024
The Rising Future of CPaaS in the Middle East 2024
 

Mocks, stubs, fakes, dummies and spies