shallow depth of tests scallable bdd and tdd

Shallow Depth of Test Scalable TDD/BDD  

www.fabiopereira.me  

TDD Call Centre  

• Slow • Brittle • Non-deterministic • Difficult to maintain • They do not scale

No Tests

TODAY  

???????  

TDD Evolution  

Quote System  

29 year old man wants: -  Car insurance -  Travel insurance

Car $25 Travel $15

Quote System  

62 year old man wants: -  Car insurance -  Travel insurance

Car $25 Travel (Too Old)

Quote System  

Can sell car insurance to people between 18 and 65. Can sell travel insurance to people between 18 and 60

Travel 17 L 18 J 60 J 61 L

Car 17 L 18 J 60 J 61 J 65 J 66 L

Internet

Quote System  

Controller  Domain Model  

JavaScript  

Repository  

WebServer ReverseProxies Authentication

JSON Services  

Controller   Quote Pricing   Validator   Mandatory

Validator  

BusRule Validator  

BR1 BR2 BRN …  

Domain Model  

Validations  

Price Calculator  

Cover1 Cover2 …  

PRICING DATA

Pricer  Error Handler  

Repository  

JSON

Controller   Quote Pricing   Validator   Mandatory

Validator  

BusRule Validator  

BR1 BR2 BRN …  

Domain Model  

Validations  

Price Calculator  

Cover1 Cover2 …  

PRICING DATA

Pricer  Error Handler  

Repository  

JSON

Age Restriction Rule  

Controller   Quote Pricing   Validator   Mandatory

Validator  

BusRule Validator  

BR1 BR2 BRN …  

Domain Model  

Validations  

Price Calculator  

Cover1 Cover2 …  

PRICING DATA

Pricer  Error Handler  

Repository  

JSON

h#p://blogs.agilefaqs.com/  

Most  so6ware  organiza;ons  today  suffer  from  what  I    called  the  “Inverted  Tes+ng  Pyramid”  (…)  

h#p://jamescrisp.org  

h#p://clipboarded.blogspot.com  

Controller   Quote Pricing   Validator   Mandatory

Validator  

BusRule Validator  

BR1 BR2 BRN …  

Domain Model  

Validations  

Price Calculator  

Cover1 Cover2 …  

PRICING DATA

Pricer  Error Handler  

Repository  

JSON

Age Restriction Rule  

Shallow Depth of Test  

Shallow Depth of Test  

MyTest  

Mock/Stub  

Stimulate  

Operate  

Simulate  

Controller   Quote Pricing   Validator   Mandatory

Validator  

BusRule Validator  

BR1 BR2 BRN …  

Domain Model  

Validations  

Price Calculator  

Cover1 Cover2 …  

PRICING DATA

Pricer  Error Handler  

Repository  

JSON

www.fabiopereira.me  

Business   Devs  Broker  Renewal  Risk  

Address  Insurer  

user  Edit  

UBD_CD  TB_ADR  en:ty  

BDD  

Given When Then

B D D

BDD at the Unit Level  

Use Builders and Fixtures  

h#p://en.wikipedia.org/wiki/Builder_pa#ern  

BDD  

Concept  

Tools/ Current Practices  

h#p://blog.carbonfive.com/2011/11/07/modern-­‐cucumber-­‐and-­‐rails-­‐no-­‐more-­‐training-­‐wheels/  

web_steps.rb  

Simulate Http  

Wiring

IN MEMORY DB (HSQL)

You can test Spring Config  

High level and Test Journeys at the UI Level

An authenticated insurance advisershould be able to sell insurance to a customer who fulfills all mandatory requirementsBusiness rules should be applied toall customers who attempt to buy insuranceCustomers should be given the right insurance premium based on their insurance requirements

High level and Test Journeys at the UI Level

An authenticated insurance adviser, should be able to sell insurance to a customer who fulfills all mandatory requirementsBusiness rules should be applied toall customers who attempt to buy insuranceCustomers should be given the right insurance premium based on their insurance requirements

High level and Test Journeys at the UI Level

An authenticated insurance adviser, should be able to sell insurance to a customer who fulfills all mandatory requirementsBusiness rules should be applied toall customers who attempt to buy insuranceCustomers should be given the right insurance premium based on their insurance requirements

TTDD – Tautological TDD  

Tauto… WHAT?!

Tautology:  from  Greek:  tauto:  the  same    logos:  word/idea            Tautological:  -­‐  needless,  redundant  repe;;on  of  an  idea  -­‐  repe;;on  of  same  sense  in  different  words;  -­‐  the  phrase  ”a  beginner  who  has  just  started”  is  tautological  

T  A  U  T  O  L  O  G  I  C  A  L  

TTDD – Mocks  

Setup Mocks

Call a method/function

Assert that mocks were called

(Dependency Injection Code)

(Mocks Setup)  

No Tests

Slow, brittle, etc  

Shallow DoT Test Pyramid Unit BDD UI Journeys Stop TTDD  

Let’s evolve…  

www.fabiopereira.me  

References h#p://apcj.blogspot.com/2005_04_01_archive.html  h#p://wa;rmelon.com  h#p://jamescrisp.org  h#p://clipboarded.blogspot.com  h#p://anton.kovalyov.net/2011/02/20/why-­‐i-­‐forked-­‐jslint-­‐to-­‐jshint/  h#p://en.wikipedia.org/wiki/Builder_pa#ern  h#p://jawr.java.net/  h#p://pivotal.github.com/jasmine/  h#p://code.google.com/p/js-­‐test-­‐driver/  h#p://blogs.agilefaqs.com/  h#p://fabiopereira.me/blog/2012/03/18/introducing-­‐depth-­‐of-­‐test-­‐dot/  

Images  h#p://www.flickr.com/photos/nburrows  h#p://www.luxury-­‐insider.com/uploads/news/2010/06/korean-­‐air-­‐first-­‐class-­‐award-­‐1.jpg  h#p://one7.files.wordpress.com/2010/06/browsers.jpg  h#p://www.luxury-­‐insider.com/uploads/news/2010/06/korean-­‐air-­‐first-­‐class-­‐award-­‐1.jpg  h#p://www.digital-­‐photography-­‐student.com/wp-­‐content/uploads/2009/01/DOF-­‐Shallow-­‐Deep.png  h#p://www.flickr.com/photos/bullgod/2604300680/  h#p://www.whatsgo#ago.com/wp-­‐content/uploads/2007/12/angry_phone2.jpg    

Thanks  

www.fabiopereira.me