Using BDD to Solve communication problems
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The document discusses using a behavior-driven development (BDD) approach to software development. It promotes using a ubiquitous language derived from user stories and scenarios to specify, develop, and test software. This helps improve communication between technical and non-technical teams. Examples are provided of automating scenarios written in a Given-When-Then format using tools like Cucumber, Gauge, and RSpec.
![SAMPLE CUCUMBERJAVA CODE
public class MyStepdefs {
@cucumber.api.java.en.Then("^I want to see "([^"]*)" in the results$")
public void iWantToSeeInTheResults(String arg0) throws Throwable {
// Write code here that turns the phrase above into concrete actions
throw new cucumber.api.PendingException();
}
@cucumber.api.java.en.When("^I fill the search field with "([^"]*)"$")
public void iFillTheSearchFieldWith(String arg0) throws Throwable {
// Write code here that turns the phrase above into concrete actions
throw new cucumber.api.PendingException();
}
@cucumber.api.java.en.Given("^I'm on the google home page$")
public void iMOnTheGoogleHomePage() throws Throwable {
// Write code here that turns the phrase above into concrete actions
throw new cucumber.api.PendingException();
}
}](https://image.slidesharecdn.com/xpconfbr-bddsolvingcommunicationproblems-151130113215-lva1-app6892/85/Using-BDD-to-Solve-communication-problems-25-320.jpg)
Using BDD to Solve communication problems
- 2. RODRIGO URUBATAN • SOFTWARE DEVELOPER SINCE 1997 • WRITER, RUNNER,CROSSFITTER, SPEAKER, A LITTLELAZY, ANDIN LOVE WITH REMOTE WORK • HTTP://URUBATAN.COM.BR • HTTP://SOBRECODIGO.COM • HTTP://TWITTER.COM/URUBATAN • HTTP://GITHUB.COM/URUBATAN
- 3. WHAT IS THE BIGGEST PROBLEM IN SOFTWARE PROJECTS?
- 4. WHAT IS THE ROOT CAUSE FOR THIS PROBLEM?
- 5. WHAT DO WE NEED TO SOLVE THIS PROBLEM?
- 6. HOW TO SOLVE THIS PROBLEM?
- 7. OK, BUT HOW’S THATGOING TO HELP DESIGN SOFTWARE? • BUSINESS VALUEIS THE KEY • WHAT IS THE NEXTIMPORTANT THING THE SYSTEM DOES NOTDO YET? • USE THE BUSINESS LANGUAGE TO SPECIFY THE SOFTWARE • USE THE BUSINESS LANGUAGE TO TEST THE SOFTWARE • USE THE BUSINESS LANGUAGE TO WRITE THE SOFTWARE • USE THE BUSINESS LANGUAGE TO VALIDATE THE SOFTWARE
- 9. USER STORIES!! • AS A … • I WANT TO ... • SO THAT ... • AS A BANK CLIENT • I WANT TO USE THE CASH MACHINE • SO THAT I CAN TAKE MONEY FROM MY ACCOUNT
- 10. BUT IT IS NOT ENOUGH!
- 11. BEHAVIOUR SPECIFICATION • CONTEXT • ACTIONS • VERIFICATION • GIVEN THERE ISMONEY IN MY ACCOUNT • AND I HAVE A VALID CARD • AND THE MONEY DISPENSER HASMONEY • WHEN I ASK THE MACHINE FOR MONEY • THEN THE MONEYSHOULD BE SUBTRACTED FROM MY ACCOUNT • AND THE MONEY SHOULD BEDELIVERED TO ME • AND MY CARD SHOULD BERETURNED
- 12. BUT HOW MUCHDETAILS CAN I GET?
- 13. HAVE YOU SEEN THAT SINTAXE ANYWHERE BEFORE?
- 14. DID YOU REMEMBER WHERE? • IN TESTER SPREADSHEETS, SOMETIMES WITHCOLUMNS INSTEAD OF OF GIVEN/WHEN/THEN • IT ISALMOST THE SYNTAX FOR THE GHERKIN LANGUAGE!!
- 15. WHAT IF I USE THE SAME BUSINESS WORDS TO NAME THINGS IN CODE?
- 16. LET’S TRY THAT! • GIVEN THERE ISMONEY IN MY ACCOUNT • AND I HAVE A VALID CARD • AND THE MONEY DISPENSER HASMONEY • WHEN I ASK THE MACHINE FOR MONEY • THEN THE MONEYSHOULD BE SUBTRACTED FROM MY ACCOUNT • AND THE MONEY SHOULD BEDELIVERED TO ME • AND MY CARD SHOULD BERETURNED • ACCOUNT.HAS_ENOUGH_MONEY?(VALUE) • CARD.VALID? • DISPENSER.HAS_MONEY? • MACHINE.I_WANT(VALUE) • ACCOUNT.SUBTRACT(VALUE) • MACHINE.DELIVER_MONEY(VALUE) • MACHINE.RETURN_CARD
- 17. WOW! EVERYONE TALKS THE SAME LANGUAGE!
- 19. BDD DEVELOPMENT CYCLE Talk to the client, write a user story or Select a user story Detail the story into scenarions Automate scenarios with selected tool Run tests and see them fail Write ony the code to make tests pass Refactor Almost the same as TDD?
- 20. OK, HOW IS THAT DIFFERENT FROM TDD “RED, GREEN, REFACTOR”? • THE MAIN FOCUS ISNOT THE TEST, IN REALITY THE AUTOMATE STEP CAN BE SKIPED SOMETIMES • THE MAIN FOCUS ISON COMMUNICATION • TEST BUSINESS BEHAVIOUR NOTLANGUAGE DEPENDENT FUNCTIONS • BEHAVIOUR IS MORE IMPORTANT TO THE SOFTWARE THAN HOW ITWAS IMPLEMENTED • THE MAIN FOCUS IN USINGA UBIQUITOUSLANGUAGE LIKEIN DDD • USING THE UBIQUITOUSLANGUAGE, THE USER STORY TEMPLATE ANDTHE SCENARIO TEMPLATE THE COMMUNICATION WITH THE ENTIRETEAM WILL IMPROVE ALOT
- 21. HAVEN’T WE FORGOT ABOUT TEST AUTOMATION?
- 22. THAT SAME CONTEXT SINTAXE CAN BE AUTOMATED BY: • CUCUMBER USING GHERKIN - HTTPS://CUCUMBER.IO/ • THOUGHTWORKS GAUGE - HTTP://GETGAUGE.IO/ • RSPEC CAN USE THAT SYNTAX TO NAME THE TEST SPECS • JBEHAVE WAS CREATED THINKINGABOUT THAT • SPECFLOW USINGGHERKIN - HTTP://WWW.SPECFLOW.ORG/
- 23. SAMPLE GHERKIN CODE FEATURE:A SAMPLE CODE FORMY PRESENTATION AS A SPEAKER I WANT TO HAVE SOME CODE SAMPLES SO THAT EVERYONE UNDERSTAND WHAT I'M TALKING ABOUT SCENARIO: DOING A SIMPLE GOOGLE SEARCH GIVENI'M ONTHE GOOGLE HOME PAGE WHENIFILL THE SEARCH FIELD WITH "URUBATAN" THENIWANT TO SEE "MY WEB PAGE"INTHE RESULTS AND I WANT TO SEE "MY FACEBOOKPROFILE"INTHE RESULTS
- 24. SAMPLE CUCUMBERRUBY CODE GIVEN(/^I'M ONTHE GOOGLE HOME PAGE$/) DO PENDING # EXPRESSTHE REGEXP ABOVE WITHTHE CODE YOUWISH YOU HAD END WHEN(/^IFILL THE SEARCH FIELD WITH "(.*?)"$/) DO |ARG1| PENDING # EXPRESSTHE REGEXP ABOVE WITHTHE CODE YOUWISH YOU HAD END THEN(/^IWANT TO SEE "(.*?)"INTHE RESULTS$/) DO |ARG1| PENDING # EXPRESSTHE REGEXP ABOVE WITHTHE CODE YOUWISH YOU HAD END
- 25. SAMPLE CUCUMBERJAVA CODE public class MyStepdefs { @cucumber.api.java.en.Then("^I want to see "([^"]*)" in the results$") public void iWantToSeeInTheResults(String arg0) throws Throwable { // Write code here that turns the phrase above into concrete actions throw new cucumber.api.PendingException(); } @cucumber.api.java.en.When("^I fill the search field with "([^"]*)"$") public void iFillTheSearchFieldWith(String arg0) throws Throwable { // Write code here that turns the phrase above into concrete actions throw new cucumber.api.PendingException(); } @cucumber.api.java.en.Given("^I'm on the google home page$") public void iMOnTheGoogleHomePage() throws Throwable { // Write code here that turns the phrase above into concrete actions throw new cucumber.api.PendingException(); } }
- 26. SAMPLE GAUGE CODE A SAMPLE CODE FORMY PRESENTATION ============= AS A SPEAKER, I WANT TO HAVE SOME CODE SAMPLES, SO THATEVERYONE UNDERSTAND WHATI'M TALKING ABOUT DOING A SIMPLE GOOGLE SEARCH ----------- *I'M ONTHE GOOGLE HOME PAGE *I FILL THE SEARCH FIELD WITH "URUBATAN" *I WANT TO SEE "MY WEB PAGE"INTHE RESULTS *I WANT TO SEE "MY FACEBOOKPROFILE"INTHE RESULTS
- 27. SAMPLE GAUGE JAVA CODE PUBLIC CLASS SAMPLEGAUGE { @STEP("I'M ON THE GOOGLE HOME PAGE") PUBLIC VOID GOTOGOOGLE() { // STEP IMPLEMENTATION } @STEP("I FILL THE SEARCH FIELD WITH <VALUE>") PUBLIC VOID FILLFIELD(STRING VALUE) { // STEP IMPLEMENTATION } @STEP("I WANT TO SEE <ADDR> IN THE RESULTS") PUBLIC VOID CHECKVALUE(STRING VALUE) { // STEP IMPLEMENTATION } }
- 28. SAMPLE GAUGE RUBY CODE STEP "I'M ONTHE GOOGLE HOME PAGE" DO END STEP "I FILL THE SEARCH FIELD WITH<NAME>" DO |NAME| END STEP "I WANT TOSEE <ADDRESS> INTHE RESULTS" |ADDRESS| END