When building your Behavior-Driven Development (BDD) examples, do you first dive into detailing all the given-when-then narratives? Chances are good that you're doing more speculative work than you should. Let's learn how to shape our BDD features using a just-in-time (JIT) mentality. In this hands-on workshop, you'll learn about when and how to negotiate stories around BDD scenario names. You'll discover how this focus can help you: * learn how to break down larger stories * determine the scope to be delivered * transition the conversation (story) into a dependable artifact.

1. BDD Is JIT
Jeff Langr
jeff@langrsoft.com
@jlangr

2. We are uncovering better ways of developing software
by doing it and helping others do it.
Through this work we have come to value:
Working software
over
comprehensive documentation
Customer collaboration
over
contract negotiation
source: http://agilemanifesto.org
@jlangr

3. Let me tell you a story...
on-hold materials
@jlangr

4. The Conversation
by Eli Kyeyune
@jlangr

5. Ron Jeffries' Three Cs
Card
Confirmation
Conversation
@jlangr

6. What Do We Hold Onto?
@jlangr

7. Bill Wake's Story Criteria
Image courtesy InvestmentTotal.com https://www.flickr.com/photos/investmenttotal/
License: https://creativecommons.org/licenses/by/2.0/
@jlangr

8. A Binary Artifact
Feature: Fines
As a librarian,
I want to assess fines for books returned late,
So that we can encourage maximum book availability.
Background:
Given a library system with one book
Scenario: Due date for book is 21 days after checkout
When a patron checks out the book on 2017/3/1
Then the due date is 2017/3/22
Scenario: Book incurs no fine when returned on due date
Given a patron checks out the book on 2017/4/1
When the book is returned on 2017/4/22
Then the patron's fine balance is 0
Scenario: Book incurs fine when returned after due date
...
@jlangr

9. Driving Via Examples
TDD
example
@jlangr

10. @jlangr

11. ...
Just-in-Time Scenario Refinement
@jlangr

12. Gherkin is alluring.
Feature: Fines
As a librarian,
I want to assess fines for books returned late,
So that we can encourage maximum book availability.
Background:
Given a library system with one book
Scenario: Due date for book is 21 days after checkout
When a patron checks out the book on 2017/3/1
Then the due date is 2017/3/22
Scenario: Book incurs no fine when returned on due date
Given a patron checks out the book on 2017/4/1
When the book is returned on 2017/4/22
Then the patron's fine balance is 0
Scenario: Book incurs fine when returned after due date
...
@jlangr

13. We're
"Designing
Scenarios"
Let's slice out that talk
about Gherkin.
"Bread & Butter pickles - Slicing cucumbers," courtesy Rebecca Siegel.
https://www.flickr.com/photos/grongar/6019669203/
License: https://creativecommons.org/licenses/by/2.0/
@jlangr

14. Explore End Results / Goals
Happy path
Alternate paths
Secondary actors
Edge cases
Error conditions
Out-of-the-box notions
@jlangr

15. Scenarios
(breadth: now)
Happy
path
title2 title3 title4 ...title5
Narrative
detail
(depth: JIT)
@jlangr

16. Exercise.
on-hold materials
@jlangr

17. Negotiate & Agree
Image courtesy Nguyen Hung Vu https://www.flickr.com/photos/vuhung/
License: https://creativecommons.org/licenses/by/2.0/@jlangr

18. Clarify Scope with Scenarios
Review scenario names holistically
Determine initial scope / priority
(Are there existing scenarios?)
@jlangr

19. 3 R's of Scenario Titles
Re-read it.
Refine the wording.
Reconsider its name every revisit.
@jlangr

20. Exercise.
Holistically look at your scenario names.
Correct for consistency and conciseness.
@jlangr

21. How else might this help?

22. Image courtesy Marcin Wichary https://www.flickr.com/photos/mwichary/
License: https://creativecommons.org/licenses/by/2.0/
Document
@jlangr

23. Define Completion Criteria
Image courtesy Oliver Tacke https://www.flickr.com/photos/otacke/
License: https://creativecommons.org/licenses/by/2.0/
@jlangr

24. Understand Progress
@jlangr

25. Slice Apart Larger Stories
Image courtesy MelisaTG https://www.flickr.com/photos/melisatg/
License: https://creativecommons.org/licenses/by/2.0/
@jlangr

26. Negotiate & Agree
Image courtesy Nguyen Hung Vu https://www.flickr.com/photos/vuhung/
License: https://creativecommons.org/licenses/by/2.0/@jlangr

27. Thank you!