My presentation of BDD @ Toulouse JUG done in January 2017

1. May The Feature Be
With You
#bdd
shoun.ichida@viseo.com
Shoun ICHIDA
@ishoun
#JUGToulouse

2. Behavior Driven
Development? ?
?
?
?
?

3. qu’est-ce que c’est ?
➡ Une méthodologie de développement
3

4. qu’apporte-t-elle ?
➡ Une meilleure compréhension du besoin
4
Besoin
Critères
d’acceptation
Tests
d’acceptation
Développement
Equipe métier
Equipe projet

5. ➡ Un complément au Test Driven Development (TDD)
5
TEST QUI RÉUSSIT
TEST
QUI ÉCHOUE
Refactoring
TDD Test
d’Acceptation
qu’apporte-t-elle ?

6. Solutions

7. Le Gherkin
7
Given
When
Then
Scenario:Luke succeed to destroy the death star
"Luke" is flying an X-wing
He drops his torpedoes
The death star should be destroyed
Feature: Destroy the death star

8. Rebels should be able to win the warAnd
Le Gherkin
7
Given
When
Then
Scenario:Luke succeed to destroy the death star
"Luke" is flying an X-wing
He drops his torpedoes
The death star should be destroyed
And His vessel has torpedoes
Feature: Destroy the death star

9. public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
@When("^He drops his torpedoes$")
public void heDropsHisTorpedeos() throws Throwable {
// Your test goes here
}
@Then(« ^The death star should be destroyed$")
public void theDeathStarShouldBeDestroyed() throws Throwable {
// Your test goes here
}
}
Cucumber-jvm
8

10. public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
@When("^He drops his torpedoes$")
public void heDropsHisTorpedeos() throws Throwable {
// Your test goes here
}
@Then(« ^The death star should be destroyed$")
public void theDeathStarShouldBeDestroyed() throws Throwable {
// Your test goes here
}
}
Cucumber-jvm
8
Expression
régulière

11. public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
public class RecipeStepdefs {
@Given("^"([^"]*)" is flying an X-wing$")
public void userIsFlyingAnXwing(String user) throws Throwable {
// Your test goes here
}
@When("^He drops his torpedoes$")
public void heDropsHisTorpedeos() throws Throwable {
// Your test goes here
}
@Then(« ^The death star should be destroyed$")
public void theDeathStarShouldBeDestroyed() throws Throwable {
// Your test goes here
}
}
Cucumber-jvm
8
Expression
régulière
Given "Luke" is flying an X-wing

12. Cucumber-jvm - Java 8
9
public class RecipeJava8Stepdefs implements En {
public RecipeJava8Stepdefs() {
Given("^"([^"]*)" is flying an X-wing$", () -> {
// Your test goes here
});
When("^He drops his torpedoes$", () -> {
// Your test goes here
});
Then(« ^The death star should be destroyed$", () -> {
// Your test goes here
});
}
}

13. i18n ?
raaaaaahhgh
uughghhhgh aaaaahnr
uughghhhgh awwgggghhh
wuuh*
*Je ne comprends pas ce que tu dis

14. # language: fr
11
# language: fr
Fonctionnalité: Faire une course de racer
En tant que pilote
Je souhaite participer à une course
Afin de gagner
Scénario: Je participer à une course
Etant donné que "Luke" a un module de course
Lorsqu’il participe à la course
Alors il gagne

15. implémentation
12
@Etantdonné("^que "([^"]*)" a un module de course$")
public void queAUnModuleDeCourse(String personnage) throws Throwable {
// TODO
}
@Lorsqu("^il participe à la course$")
public void ilParticipeALaCourse() throws Throwable {
// TODO
}
@Alors("^il gagne$")
public void ilGagne() throws Throwable {
// TODO
}

16. Teach me the force

17. Mais le BDD,
ça fonctionne vraiment ?

18. Pour aller plus loin…

19. Références
http://dannorth.net/introducing-bdd/
http://blog.viseo-bt.com/as-viseo-we-went-to-cukeup-
so-we-can-improve-our-bdd/
https://cucumber.io
https://github.com/sichida/BDD-examples/tree/
jug_toulouse
https://github.com/cucumber/cucumber/wiki/Spoken-
languages
http://fr.slideshare.net/ichidashoun/

20. Avez-vous des
questions
?