![Write code to make the step pass
@Given("^I am a [a-zA-Z]{1,} tester$")
public void I_am_a_bad_tester(){
System.out.println("@Given--I am a bad tester");
}
@When("^I go to work$")
public void I_go_to_work(){
System.out.println("@When---I go o work");
}
@Then("^I [a-zA-Z]{1,} it$")
public void I_mess_with_it(){
System.out.println("@Then--I mess it");
}
@And("^my boss [a-zA-Z]{1,} me$")
public void my_boss_fires_me(){
System.out.println("@And---my boss fires me");
}
@But("^the developer [a-zA-Z]{1,} me$")
public void the_developer_likes_me(){
System.out.println("@But--the developer likes me");
}](https://image.slidesharecdn.com/97pmyznoszolnwter5cy-signature-273ff13ba68b3806c26f9c2d0da8a66d3b40af41f9c0e0f229005c2267100523-poli-160427165821/85/Behaviour-driven-development-22-320.jpg)
Behaviour driven development
- 1. Behaviour Driven Development with Cucumber for Java
- 2. BDD Domain Driven Design - DDD ● Common understanding ● Common language ● Test Driven Development - TDD ● Good technical practices ● Small steps ● Combined → Behaviour Driven Development
- 3. Test automation Test Driven Development, TDD – Develop it the right way Behaviour Driven Development, BDD – Develop the right thing
- 4. Three core principles • Business and Technology should refer to the same system in the same way • Any system should have an identified, verifiable value • Up-front analysis, design and planning all have a diminishing return
- 5. Common language Used by all involved • Customer • Developers • Others?
- 6. Verifiable value • Protect revenue • Increase revenue • Manage cost • Increase brand value • Make the product remarkable • Provide more value to your customer
- 7. Big design up-front • No big design up-front • The further you plan ahead, the less accurate you will be
- 8. Three questions • What is the most important thing the system should do? • What is the next most important thing the system doesn't do yet? • If we were to switch off the system, where and what would be the biggest impact?
- 9. Time to create a specification
- 10. Time to create a specification When are we done?
- 11. Interpret and translate We need to read the spec. Understand it Translate it into code Parse and execute it? No, not all specs are created equal
- 12. Solution Write specifications so Translations isn't needed It is possible to execute them
- 13. Format • Given – Setup the system • When – Change the state of the system • Then – Verify the new state
- 14. Tools
- 15. Audience Readers Customers Developers Maintainers Product owner Developers
- 16. Why Cucumber It is one of the least technical tools It is a very active open source project It supports a variety of languages
- 17. A concrete example Feature: Life of IT guys In order to get good salary As a it guy I want to keep my boss happy Scenario: I am a tester Given I am a bad tester When I go to work Then I mess with it And my boss fires me But the developer likes me
- 18. Advantages The format is ● Easy to read ● Easy to understand ● Easy to discuss ● Easy to parse
- 19. Parse and execute ● A parser is developed ● Add native code to implement the steps Setup – Given Execute – When Assert - Then
- 20. Write a step definition in Java @Given("^I am a bad tester$") public void I_am_a_bad_tester(){ System.out.println("@Given--I am a bad tester"); } @When("^I go to work$") public void I_go_to_work(){ System.out.println("@When---I go o work"); } @Then("^I mess it$") public void I_mess_with_it(){ System.out.println("@Then--I mess it"); } @And("^my boss fires me$") public void my_boss_fires_me(){ System.out.println("@And---my boss fires me"); } @But("^the developer likes me$") public void the_developer_likes_me(){ System.out.println("@But--the developer likes me"); Assert.assertTrue(false); }
- 21. Run it and watch it fail
- 22. Write code to make the step pass @Given("^I am a [a-zA-Z]{1,} tester$") public void I_am_a_bad_tester(){ System.out.println("@Given--I am a bad tester"); } @When("^I go to work$") public void I_go_to_work(){ System.out.println("@When---I go o work"); } @Then("^I [a-zA-Z]{1,} it$") public void I_mess_with_it(){ System.out.println("@Then--I mess it"); } @And("^my boss [a-zA-Z]{1,} me$") public void my_boss_fires_me(){ System.out.println("@And---my boss fires me"); } @But("^the developer [a-zA-Z]{1,} me$") public void the_developer_likes_me(){ System.out.println("@But--the developer likes me"); }
- 23. Run it again and see the step pass
- 24. Why is Cucumber better ● Compared to well known tools like JUnit? ● It isn't, it's just easier to read for non coders ● The readability has increased ● Communication is easier
- 25. Benefits ● Less unnecessary work ● Better regression tests ● Less speculative work ● Less re-work
- 26. Maintenance Maintained together ● Specs ● Tests ● Code Maven Continuous Integration, CI
- 27. Tips Always use the a common language Don't over specify – start easy Never specify implementation details
- 28. Do not focus on tools • They will never solve the problem • A fool with a tool is still a fool
- 29. Resources Cucumber - http://cukes.info/ Selenium - http://seleniumhq.org/ Maven - http://maven.apache.org/ Jenkins - http://jenkins-ci.org/ Blog -http://thomassundberg.wordpress.com/
- 30. Thank You