The document discusses the pros and cons of behavior driven development (BDD). It outlines some benefits of BDD such as collaboration between teams, use of ubiquitous language, and business user scenarios. However, it also notes some challenges with BDD including difficulty getting customers involved in writing scenarios and representing real-life complex systems with scenarios. The document provides examples of BDD scenarios and considerations around developer readiness and using BDD throughout the development process and product release.

1. The Pros of Behavior Driven Development (BDD): Business User Scenarios Natalya Zaytseva Exactpro Systems LLC

2. Test Driven Development (TDD) Test Failed Add a test Test Passed Update the code Refactor

3. Test Driven Development (TDD) Benefits Unit tests prove that code actually works Refactoring allows to improve the design of the code Low-level regression test suite Test-first reduces the cost of bugs Drawbacks Developers can consider it as a waste of time Anticipation by developers the concept of “Testing” The tests can be targeted on verification of classes and methods and not on what the code really should do

4. Behavior Driven Development (BDD) Shifting from thinking in “tests” to thinking in “behavior” Collaboration between Business stakeholders, Business Analysts, QA team and Developers Ubiquitous language .

5. Behavior Driven Development (BDD) Approach a feature4 QA Analyst Ubiquitous language Behavior feature1 feature3 QA Analyst Scenarios Class Developer

6. BDD: Business Scenarios Story: [Narrative] As a Role I request a Feature To gain a Benefit Scenario Given [context] AND [some more context] When [Event] Then [Outcome] And [Another Outcome]

7. BDD Cons Ivan Bobrov EXTENT October 2011

8. The Beginning

9. Is it easy to describe? Scenario: An Artist creates an art work Given I am a registered artist And I am on my dashboard And I follow "Add an artwork" within "#dashboard" When I fill in "Title" with "The Portrait" And I fill in "Description" with "A nice portrait." And I select "Painting" from "Category" And I attach “ portret .jpg" to "Select picture" And I press "Create" Then I should see "The Portrait " was successfully added to your art collection

10. A Client and BDD is Face to Face With every new project I hoped that Cucumber can become one of the communication tools between our team and the customer. Only once I managed to get the customer write the scenarios , however the quality wasn't good and they had to be rewritten by a developer It was difficult to convince the customer to review the scenarios on a daily basis . They preferred writing a document or using a ticketing system like Redmine. The result is that we have requirements in 2 places - tickets and scenarios Andrzej Krzywda

11. Are developers ready for BDD? A developer often writes specifications Specs are very detailed Scripts, scenarios or a manual? Easy to understand

12. BDD doesn’t show a real life In BBD Scenario NewOrderSingle where SecurityID=S1 and Price=P1 and Side=BUY and Quantity=Q1 … In Real Life Initialize TCP connection Send Logon to the GW Wait for Logon response Start sending HeartBeats Send NewOrderSingle with ….

13. Release A Product is ready to use BDD it’s a design tool

14. 1770 year

15. 2011 year

16. Thank you.