tdd - test driven development
DESCRIPTION
Slides da minha palestra sobre TDD, ministrado no IIES, em Itapetininga, SPTRANSCRIPT
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@snit_ram
TDD - TEST DRIVEN
DEVELOPMENT
sábado, 22 de outubro de 11
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ALGORITMOSMOLDAM O MUNDO
baseado em“How algorithms change shape our world”
de Kevin Slavin
sábado, 22 de outubro de 11
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http://www.michaelnajjar.com/
sábado, 22 de outubro de 11
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http://www.produtopia.com.br/wp-content/uploads/2010/02/stealth.jpg
sábado, 22 de outubro de 11
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http://www.geog.ucsb.edu/img/news/2009/bird%20flock%20wiki.jpg
sábado, 22 de outubro de 11
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http://reddogreport.com/wp-content/uploads/2011/04/Wall-Street-Sign-Flag.jpg
sábado, 22 de outubro de 11
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DO MERCADO DE AÇÕES AMERICANO
%
sábado, 22 de outubro de 11
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DO MERCADO DE AÇÕES AMERICANO
70%
sábado, 22 de outubro de 11
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http://reddogreport.com/wp-content/uploads/2011/04/Wall-Street-Sign-Flag.jpg
sábado, 22 de outubro de 11
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sábado, 22 de outubro de 11
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$1,730,045.91
sábado, 22 de outubro de 11
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$23,698,655.93
sábado, 22 de outubro de 11
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DAS LOCAÇÕES
%
sábado, 22 de outubro de 11
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DAS LOCAÇÕES
60%
sábado, 22 de outubro de 11
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sábado, 22 de outubro de 11
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1.327 km13,3 milissegundos
sábado, 22 de outubro de 11
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http://www.michaelnajjar.com/
sábado, 22 de outubro de 11
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NÓS ESCREVEMOS ALGORITMOS
sábado, 22 de outubro de 11
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24 milhões visitantes142 milhões page views
ESTADAO.COM.BRago/2011
149 milhões visitantes3.9 bilhões page views
YAHOO.COMago/2011 - US only
sábado, 22 de outubro de 11
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REVENDO O WATERFALL
http://www.flickr.com/photos/chiaralily/4416226801/sizes/z/in/photostream/
sábado, 22 de outubro de 11
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Requisitos
Análise
Design
Código
Testes
Manutenção
REVENDO O WATERFALL
sábado, 22 de outubro de 11
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TEORIA DAS FILAS
http://www.flickr.com/photos/57665680@N06/5649865356/sizes/l/in/photostream/
sábado, 22 de outubro de 11
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TEORIA DAS FILAS
Dado um processo B, que sucede um processo A, as vezes, ao executar B,
precisamos refazer parte de A. Podemos evitar este retrabalho extraindo parte de B e executando-o antes do processo A
“
”sábado, 22 de outubro de 11
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TEORIA DAS FILAS
A B
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TEORIA DAS FILAS
A B20%
sábado, 22 de outubro de 11
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TEORIA DAS FILAS
B A
Cicloscurtos
sábado, 22 de outubro de 11
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Código Teste
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Código
Bugs
Teste
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Teste Código
Cicloscurtos
sábado, 22 de outubro de 11
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Teste
CódigoDesign
sábado, 22 de outubro de 11
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Teste
CódigoDesign
“Não testável”
sábado, 22 de outubro de 11
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Teste Código
Design
CiclosCurtos
sábado, 22 de outubro de 11
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Teste Código
Design
CiclosCurtos
= TDD
sábado, 22 de outubro de 11
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COMO FUNCIONA
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GREENREFACTOR
RED
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GREENREFACTOR
RED
Escrever um pequeno teste
falhando
sábado, 22 de outubro de 11
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GREENREFACTOR
REDEscrever o
código para o teste passar
sábado, 22 de outubro de 11
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GREENREFACTOR
RED
Remover duplicações
sábado, 22 de outubro de 11
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GREENREFACTOR
RED
sábado, 22 de outubro de 11
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NA PRÁTICA
Usando Java + JUnit
sábado, 22 de outubro de 11
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...
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VANTAGENS
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Reduz bugs e retrabalho
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Reduz bugs e retrabalho
Testes automatizados
sábado, 22 de outubro de 11
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Reduz bugs e retrabalho
Simplifica a solução
Testes automatizados
sábado, 22 de outubro de 11
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+ Manutenabilidade
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+ Manutenabilidade
Segurança pra refatorar /alterar
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+ Manutenabilidade
Segurança pra refatorar /alterar
...
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PERGUNTAS?
http://3.bp.blogspot.com/_jsodkvOsdoI/S6-cn1eGTTI/AAAAAAAAANc/084nJmU4SYE/s1600/Classroom+Discussion+Questions.jpg
sábado, 22 de outubro de 11