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TEST DRIVEN DEVELOPMENT
Hercules Lemke Merscher - @hlmerscher
O que é?
http://i-love-my-life.com/wp-content/uploads/2011/03/doubt.jpg
TÉCNICA
https://media.licdn.com/mpr/mpr/shrinknp_800_800/AAEAAQAAAAAAAASQAAAAJDllYzc1ZjgxLTliNDQtNGU2MS1hNDg0LTFiOWZlNTQ4N2Q5ZA.png
TDD E TESTE AUTOMATIZADO. SINÔNIMOS?
https://images.rapgenius.com/e7c0c514d4e7564079c2e6b0c8d547b5.540x350x1.jpg
POR QUÊ?
https://imgflip.com/s/meme/Question-Rage-Face.jpg
ERROS RECORRENTES
https://upload.wikimedia.org/wikipedia/commons/3/3b/Windows_9X_BSOD.png
O COMPUTADOR É MAIS RÁPIDO
http://www.seuseriado.com/wp-content/uploads/2016/04/The-Flash-2ª-Temporada.jpg
O COMPUTADOR NÃO CANSA
http://2.bp.blogspot.com/-mF5paUPo6tQ/UkeaGETMkWI/AAAAAAAAAYA/L6AnHHKP8uc/s1600/52636309+(1).png
LEI DE MURPHY
http://shedka.com/wp-content/uploads/2015/06/tostada-1000x666.jpg
BUG’S EM PRODUÇÃOhttp://www.dan-dare.org/FreeFun/Images/CartoonsMoviesTV/BugsLifeWallpaper800.jpg
MEDO DE TOCAR NO CÓDIGO
https://councillorpadraigmcshane.files.wordpress.com/2012/11/scooby-and-shaggy-afraid-scooby-doo-2992126-852-480.jpg
CORREÇÕES QUE GERAM MAIS BUG’S
http://web.pdx.edu/~cem3/looney/img/coyoterocket.png
http://iblasquez.github.io/presentation_TDD_CodingDojo/TDD_Mantra.png
VERMELHO
http://static.maciverinstitute.com/F%20Letter%20Grade-cropped-proto-custom_4-thumb-618xauto-7419.jpg
VERDE
https://www.exceptionnotfound.net/content/images/2015/04/the-coder.jpg
REFATORA
http://cdn.hitfix.com/photos/6214402/HannibalLecterSOTL.jpg
E A PARTE DO CÓDIGO, JÁ CHEGOU?
https://i.ytimg.com/vi/ovm2zkuqJD8/maxresdefault.jpg
PRIMEEEIIIIROOOO...
ESCREVA O TESTE
http://2.bp.blogspot.com/-S8U-dF2WTzk/UlLk0q5jy4I/AAAAAAAAC4M/OFlBxMqwCYA/s1600/mask.jpg
TESTE
test('Product instantiates a new product', (t) => {
let product = new Product();
t.ok(product instanceof Product);
t.end();
});
TESTE FALHA
ReferenceError: Product is not defined
CÓDIGO
function Product() {
}
TESTE PASSA# Product instantiates a new productok 1 should be truthy
1..1# tests 1# pass 1
# ok
BABY STEPS
http://www.clipartkid.com/images/300/download-baby-steps-clipart-LA7TaY-clipart.jpg
TESTEtest('Product#price zero by default', (t) => {
let product = new Product();
t.equal(product.price, 0);
t.end();
});
TESTE FALHA# Product#price zero by default
not ok 2 should be equal
---
operator: equal
expected: 0
actual: undefined
CÓDIGO
function Product() {
this.price = 0;
}
TESTE PASSA# Product#price zero by default
ok 2 should be equal
1..2
# tests 2
# pass 2
# ok
TESTEtest('Product#quantity zero by default', (t) => {
let product = new Product();
t.equal(product.quantity, 0);
t.end();
});
TESTE FALHA# Product#quantity zero by default
not ok 3 should be equal
---
operator: equal
expected: 0
actual: undefined
CÓDIGO
function Product() {
this.price = 0;
this.quantity = 0;
}
TESTE PASSA# Product#quantity zero by default
ok 3 should be equal
1..3
# tests 3
# pass 3
# ok
TESTEtest('Product#total calculates amount', (t) => {
let product = Object.assign(
new Product(), { price: 10, quantity: 2 });
t.equal(product.total(), 20);
t.end();
});
TESTE FALHA
t.equal(product.total(), 20);
^
TypeError: product.total is not a function
CÓDIGO
function Product() {
this.price = 0;
this.quantity = 0;
this.total = () => this.price * this.quantity;
}
TESTE PASSA# Product#total calculates amount
ok 4 should be equal
1..4
# tests 4
# pass 4
# ok
COM TDD EU AGARANTCHÍU !!!https://img.buzzfeed.com/buzzfeed-static/static/2015-03/3/10/enhanced/webdr14/enhanced-buzz-29154-1425395469-14.jpg
TDD É SOBRE FEEDBACK
http://www.sacadasdecarreira.com.br/files/2015/12/design-feedback-tips.png
TESTE UNITÁRIO
http://unity-coding.slashgames.org/wp-content/uploads/unit-test.jpg
TESTE DE REGRESSÃO
https://d.ibtimes.co.uk/en/full/1396036/delorean.jpg
TESTE DE INTEGRAÇÃO
http://mlb-s1-p.mlstatic.com/15139-MLB20096270752_052014-O.jpg
TESTE DE ACEITAÇÃO
http://aaronacceptance.ca/wp-content/uploads/2015/07/Loan-Approval_Aaron_Acceptance_256.png
MOCKS, STUBS E FAKES
http://goias24horas.com.br/wp-content/uploads/2013/08/marionete.jpg
CÓDIGO DIFÍCIL DE TESTAR
É UM MAU SINAL?
QUANTAS ASSERTIVAS POR TESTE?
DEVO USAR PASSOS DE BEBÊ
SEMPRE?
PRECISO DA APROVAÇÃO DO MEU CHEFE PARA
ESCREVER TESTES?
http://cdn.business2community.com/wp-content/uploads/2016/01/Godfather-300x169-3.png-3.png
COBERTURA
COBERTURA
https://github.com/hlmerscher/dojo-onde
http://www.maonamassasalgadosecia.com.br/uploads/widget/image/512/170/51217096/mao-na-massa.png
REFERÊNCIAS
OBRIGADO!www.herculesdev.com.br
