Behavior Driven Development Pros and Cons

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The Cons of Behavior Driven Development (BDD) …

The Cons of Behavior Driven Development (BDD)
Ivan Bobrov, ClubQA Co-Founder, Kostroma

The Pros of Behavior Driven Development (BDD): Business User Scenarios
Natalia Zaitseva, Exchange Functional Test Automation Lead Innovative Trading Systems

EXTENT Conference.
October 29-30, 2011
Test Automation for Trading Systems
Renaissance Hotel Moscow

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  • 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.