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Dev to QA 1:1

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Dev to QA 2:1

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Dev to QA 3:1

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Dev to QA ∞:1

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Uri Nativ Head of Engineering & Site Manager Klarna Tel Aviv

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SAFE & SIMPLE payments online

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Stockholm SWEDEN Tel Aviv ISRAEL

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$1,000,000,000

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1 2 3 3 steps to QUALITY

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The ABSURD in having a QA org.

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a WALL between ACTIONS and CONSEQUENCES

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devs are LAZY

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our job is NOT to CODE our job is NOT to TEST we are software engineers we SHIP software that SOLVES problems

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1 2 3 3 steps to QUALITY

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2 3 3 steps to QUALITY 1 NO QA

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Number of bugs Time High Medium Low BUGS over TIME

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Number of bugs Time High Medium Low BUGS over TIME

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Number of bugs Time High Medium Low Micro BUGS over TIME

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zero BUGS policy fix ALL bugs

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BUGS first FEATURES second zero BUGS policy

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DELETE bugs zero BUGS policy

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2 3 3 steps to QUALITY 1 NO QA

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3 3 steps to QUALITY 1 NO QA 2 ZERO BUGS POLICY

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Cost of fixing BUGS

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Requirements Design Code Test Production 10x 50x COST of bug fix 1x 5x 150x Phase detected Cost

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COST of bug fix 1x 5x 150x Phase detected Cost Requirements Design Code Test Production 10x 50x

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Requirements Design Code Test Production 1 YEAR

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Requirements Design Code Test Production 6 MONTHS

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Requirements Design Code Test Production 1 MONTH

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Requirements Design Code Test Production 1 WEEK

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Requirements Design Code Test Production HOURS

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Requirements Design Code Test Production HOURS 150x 1x 5x 10x 50x

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Requirements Design Code Test Production HOURS 150x 1x 5x 10x 50x

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Requirements Design Code Test Production HOURS 150x 1x 5x 10x 50x

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Requirements Design Test Code Production HOURS 150x 1x 5x 50x 10x

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Requirements Design Code Production Test HOURS 50x 1x 5x 10x 150x

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Requirements Design Code Production Test HOURS 50x 1x 5x 10x 150x

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QUALITY is in the EYE of the BEHOLDER

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3 3 steps to QUALITY 1 NO QA 2 ZERO BUGS POLICY

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3 2 1 NO QA ZERO BUGS POLICY SHORT FEEDBACK LOOP 3 steps to QUALITY

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Short feedback LOOP

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BDD & TDD

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CUCUMBER SCENARIO 1 Feature: Upsale for existing merchant Background: Given I have valid user for Klarna Scenario: Complete upsale flow Given I am on the login page When I login as a valid user Then I should see a pricing page When I accept the terms and conditions And I click the next button Then I should see the thank you page

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CUCUMBER SCENARIO 1 Feature: Upsale for existing merchant Background: Given I have valid user for Klarna Scenario: Complete upsale flow Given I am on the login page When I login as a valid user Then I should see a pricing page When I accept the terms and conditions And I click the next button Then I should see the thank you page

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CUCUMBER SCENARIO 1 Feature: Upsale for existing merchant Background: Given I have valid user for Klarna Scenario: Complete upsale flow Given I am on the login page When I login as a valid user Then I should see a pricing page When I accept the terms and conditions And I click the next button Then I should see the thank you page

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CUCUMBER SCENARIO 1 Feature: Upsale for existing merchant Background: Given I have valid user for Klarna Scenario: Complete upsale flow Given I am on the login page When I login as a valid user Then I should see a pricing page When I accept the terms and conditions And I click the next button Then I should see the thank you page

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CUCUMBER SCENARIO 2 Feature: Upsale for existing merchant Background: Given I have valid user for Klarna Scenario: Upsale dropout Given I am on the login page When I login as a valid user Then I should see a pricing page When I wait 24 hours Then a Lead is created in the CRM

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CUCUMBER STEP DEFINITON Given /^I am on the login page$/ do url = “https://www.klarna.com/login” visit url end When /^I login as a valid user$/ do fill_in "uid", :with => @valid_user[:uname] fill_in "pass", :with => @valid_user[:pass] click_button "login" end Then /^I should see a pricing page$/ do page.should have_selector ("title", :text => 'Pricing Page Title') end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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RSPEC – CONTROLLER TEST describe ‘UpsaleController’ do describe ‘login endpoint’ do it "should redirect to OAuth login" do OAuthAPI.stub(:get_login_url). and_return ("https://login.klarna.com") get :login response.should redirect_to ("https://login.klarna.com") end end

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CONTROLLER class UpsaleController < ApplicationController def login redirect_to OAuthAPI.get_login_url end end

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PAIR programming

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code REVIEW

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continuous INTEGRATION

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continuous DELIVERY

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DARK launch

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gradual ROLLOUT

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100% Eng. Internal 1% gradual ROLLOUT 5%

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Short feedback LOOP

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“ YES, BUT…” - Guri Alfi

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take NOTHING FOR granted

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3 2 1 NO QA ZERO BUGS POLICY SHORT FEEDBACK LOOP 3 steps to QUALITY

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THANK YOU @reversim

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THANK YOU @reversim

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Uri Nativ @unativ @ uri.nativ@klarna.com