Specification

Tests Cases

Build

Test

How do we know we are done?

Deploy

•Long feedback loops•Keeping specs, system and test cases in sync•Silos of specification, build, test

•Reduces feedback loops

•Combines specifications, test cases &code

•Promotes collaboration

Executable Specification

Cucumber Organization

Features Step Definitions

System Under Test

Load

Match

Call

Feature FileFeature: Turn cucumber into beer As a cucumber presenter I want beer after my presentation So I can enjoy the rest of DemoCampGuelph

Scenario: Brydon buys Declan beer Given Brydon hosts DemoCampGuelph When Declan demos Cucumber Then Brydon should buy Declan 1 beer

Scenario: Ali buys Declan beer Given Ali hosts DemoCampGuelph When Declan demos Cucumber Then Ali should buy Declan 1 beer

Step DefinitionsGiven /^(.+) hosts/ do |host| @event = Event.new(host)end

When /^(.+) demos/ do |presenter| @event.add(presenter)end

Then /^(.+) should buy (.+) (\d+) (.*)$/ do |buyer, drinker, qty, item| perk = @event.perks[0]; perk.buyer.should == buyer; perk.receiver.should == drinker perk.quantity.should == quantity.to_i; perk.item.should == item end

System Under Testclass Event attr_reader :perks def initialize(host) @host = host; @perks = [] end def add(presenter) @perks.push Perk.new(@host, presenter, 1, "beer") end end

class Perk attr_reader :buyer, :receiver, :quantity, :item

def initialize(buyer, receiver, quantity, item) @buyer = buyer; @receiver = receiver @quantity = quantity; @item = item endend

Execution Scenario: Brydon buys Declan beer Given Brydon hosts DemoCampGuelph When Declan demos Cucumber Then Brydon should buy Declan 1 beer

Given /^(.+) hosts/ do |host| @event = Event.new(host)End

When /^(.+) demos/ do |presenter| @event.add(presenter)end

Then /^(.+) should buy (.+) (\d+) (.*)$/ do |buyer, drinker, qty, item| perk = @event.perks[0]; perk.buyer.should == buyer; perk.receiver.should == drinker perk.quantity.should == quantity.to_i; perk.item.should == item end

“Brydon”

Execution Scenario: Brydon buys Declan beer Given Brydon hosts DemoCampGuelph When Declan demos Cucumber Then Brydon should buy Declan 1 beer

Given /^(.+) hosts/ do |host| @event = Event.new(host)End

When /^(.+) demos/ do |presenter| @event.add(presenter)end

Then /^(.+) should buy (.+) (\d+) (.*)$/ do |buyer, drinker, qty, item| perk = @event.perks[0]; perk.buyer.should == buyer; perk.receiver.should == drinker perk.quantity.should == quantity.to_i; perk.item.should == item end

“Declan”

Execution Scenario: Brydon buys Declan beer Given Brydon hosts DemoCampGuelph When Declan demos Cucumber Then Brydon should buy Declan 1 beer

Given /^(.+) hosts/ do |host| @event = Event.new(host)End

When /^(.+) demos/ do |presenter| @event.add(presenter)end

Then /^(.+) should buy (.+) (\d+) (.*)$/ do |buyer, drinker, qty, item| perk = @event.perks[0]; perk.buyer.should == buyer; perk.receiver.should == drinker perk.quantity.should == quantity.to_i; perk.item.should == item end

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Cucumber Support

More Stuff

http://cukes.info/http://wiki.github.com/aslakhellesoy/cucumber

Declan Whelanhttp://dpwhelan.comhttp://twitter.com/dwhelan