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Testes – Solving communication problems in distributed teams with

BDDRodrigo Urubatan

Developer, Writer, Crossfitter, Archer

Globalcode – Open4education

What is the biggest problem in software projects?

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What is the root cause for this problem?

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What do we need to solve this problem?

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How to solve this problem?

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Ok, but how’s that going to help design software?

Business value is the keyWhat is the next important thing the system does not do yet?Use the business language to specify the softwareUse the business language to test the softwareUse the business language to write the softwareUse the business language to validate the software

Globalcode – Open4education

Globalcode – Open4education

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

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Need to see it everywhere

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But it is not enough!

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Behaviour Specification

ContextActionsVerification

• GIVEN THERE IS MONEY IN MY ACCOUNT• AND I HAVE A VALID CARD• AND THE MONEY DISPENSER HAS MONEY• WHEN I ASK THE MACHINE FOR MONEY• THEN THE MONEY SHOULD BE

SUBTRACTED FROM MY ACCOUNT• AND THE MONEY SHOULD BE DELIVERED

TO ME• AND MY CARD SHOULD BE RETURNED

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But how much details can I get?

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Have you seen that sintaxe anywhere before?

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Did you remember where?

In tester spreadsheets, sometimes with columns instead of given/when/thenIt is almost the syntax for the gherkin language!!

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What if I use the same business words to name things in code?

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Let’s try that!

• GIVEN THERE IS MONEY IN MY ACCOUNT

• AND I HAVE A VALID CARD• AND THE MONEY DISPENSER HAS

MONEY• WHEN I ASK THE MACHINE FOR

MONEY• THEN THE MONEY SHOULD BE

SUBTRACTED FROM MY ACCOUNT• AND THE MONEY SHOULD BE

DELIVERED TO ME• AND MY CARD SHOULD BE RETURNED

• ACCOUNT.HAS_ENOUGH_MONEY?(VALUE)

• CARD.VALID?• DISPENSER.HAS_MONEY?• MACHINE.I_WANT(VALUE)• ACCOUNT.SUBTRACT(VALUE)• MACHINE.DELIVER_MONEY(VALUE)• MACHINE.RETURN_CARD

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Wow! Everyone talks the same language!

Globalcode – Open4education

Globalcode – Open4education

BDD Development cycle

Talk to the client, write a user story

orSelect a user

story

Detail the story into

scenarions

Automate scenarios with selected toolRun tests and

see them fail

Write ony the code to make tests

pass

Refactor

Almost the same as TDD?

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OK, how is that different from TDD “Red, green, refactor”?

The main focus is not the test, in reality the automate step can be skiped sometimesThe main focus is on communicationTest business behaviour not language dependent functionsBehaviour is more important to the software than how it was implementedThe main focus in using a ubiquitous language like in DDDUsing the ubiquitous language, the user story template and the scenario template the communication with the entire team will improve a lot

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Haven’t we forgot about test automation?

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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 specsJbehave was created thinking about thatSpecflow using gherkin -http://www.specflow.org/

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Sample gherkin code

Feature: A sample code for my presentationAs a speakerI want to have some code samplesSo that everyone understand what I'm talking about

Scenario: doing a simple google searchGiven I'm on the google home pageWhen I fill the search field with "Urubatan"Then I want to see "my web page" in the resultsAnd I want to see "my facebook profile" in the results

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Sample cucumber RuBY code

Given(/^I'm on the google home page$/) dopending # express the regexp above with the code you wish you had

end

When(/^I fill the search field with "(.*?)"$/) do |arg1|pending # express the regexp above with the code you wish you had

end

Then(/^I want to see "(.*?)" in the results$/) do |arg1|pending # express the regexp above with the code you wish you had

end

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SAMPLE CUCUMBER JAVA 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 actionsthrow 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 actionsthrow 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 actionsthrow new cucumber.api.PendingException();

}}

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Sample gauge code

A sample code for my presentation=============

As a speaker, I want to have some code samples, So that everyone understand what I'm talking about

doing a simple google search-----------* I'm on the google home page* I fill the search field with "Urubatan"* I want to see "my web page" in the results* I want to see "my facebook profile" in the results

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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}

}

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Sample gauge ruby code

step "I'm on the google home page" do

endstep "I fill the search field with <name>" do |name|

endstep "I want to see <address> in the results" |address|

end

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Rodrigo Urubatanhttp://www.urubatan.com.brhttp://sobrecodigo.comTwitter @urubatanhttp://github.com/urubatanhttp://linkedin.com/in/urubatanhttp://fb.com/urubatan