"Given..When..Then"...a common perception of Behaviour Driven Development focuses on writing and automating SpecFlow-style scenarios. In fact this is just a small part of BDD: the full scope of BDD ranges from requirements discovery and description, through to driving technical design and implementation, helping testers focus their testing efforts more effectively, and even providing reliable, useful and accurate technical documentation. In this talk, you will learn about how much more there is to BDD than just "Given..When..Then"!

1. BDD
It’s not just ‘given-when-then’

2. John Ferguson Smart
Consultant
Trainer
Mentor
Author
Speaker
Coder

3. So what is this BDD thing?
Scenario:
Learning
About
Qantas
Given
I
am
on
the
Wikipedia
home
page
When
I
search
for
'Qantas'
in
'English'
Then
I
should
see
the
'Qantas'
wikipedia
entry
A
Test
Automa6on
Tool?

4. So what is this BDD thing?
Scenario:
Learning
About
Qantas
Given
I
am
on
the
Wikipedia
home
page
When
I
search
for
'Qantas'
in
'English'
Then
I
should
see
the
'Qantas'
wikipedia
entry
A
way
to
write
acceptance
criteria?

5. So what is this BDD thing?
Scenario:
Learning
About
Qantas
Given
I
am
on
the
Wikipedia
home
page
When
I
search
for
'Qantas'
in
'English'
Then
I
should
see
the
'Qantas'
wikipedia
entry
A
way
to
define
requirements?

6. BDD
Feature Injection
Automated Acceptance
Criteria
API and code design
Collaboration
Building the software right
Building the right software
Living Documentation

7. “Having
the
conversa/on
is
more
important
than
recording
the
conversa/on
is
more
important
than
automa/ng
the
conversa/on”
-­‐
Liz
Keogh
BDD
starts
with
conversa6on

8. Feature
Injec6on
Hunt
the
value!

9. Why do we build any feature?
Increase
Revenue
Protect
Revenue
Reduce
Costs
Avoid
Future
Costs

10. Examples/Scenarios
Stories
Features
Capabilities
Goals
Acceptance Criteria
Where do
features
come from?

11. Features guide the development process

12. But knowing why we build a feature is even better
To increase
ticket sale
revenue
Why Who How
travellers take the train
more often
suggest taking
the train to
friends
What
online booking
social network
integration
concessions
credit card
payment

13. Story
bug
reports
Working
code boring
manual
tes:ng
WASTE
BA
Developer
Tester
Many teams build features like this…
Collabora6on

14. …but a little cooperation goes a long way…
Working
code
and
Working
Automated
Acceptance
Tests Exploratory
tes:ng,
usability
tes:ng...
Shared
understanding
Story
Examples
Automated
acceptance
criteria
Collabora6on

15. We call this “The Three Amigos”
BA
and/or
product
owner
Tester Developer Automatable
Acceptance
Criteria
Shared
understanding
Collabora6on

16. Collabora6on
We call this “The Three Amigos”

17. “Automation without
collaboration is empty”

18. Scenario
Step
Defini6ons
Low
level
specifica6ons
(aka
“unit
tests”)
Applica6on
Code
API
and
Code
Design

19. Oh, the things you can learn…
API
and
Code
Design

20. What
would
we
like
the
API
to
look
like?
API
and
Code
Design

21. Then
write
low-­‐level
specifica6ons
for
the
code
API
and
Code
Design

22. Then
write
low-­‐level
specifica6ons
for
the
code
API
and
Code
Design

23. “Every class is an API for
someone”

24. Living
Documenta6on

25. Living
Documenta6on
A
star:ng
point
for
manual
tests
Illustrates
delivered
features
Func:onal
and
technical
documenta:on
Progress
repor:ng

26. Living
Documenta6on
Scenario: Searching by keyword
Given Sally wants to buy a puppy for her son
When she looks for ads in the Pets & Animals category containing puppy
Then she should obtain a list of ads for puppies for sale

27. Living
Documenta6on

28. Living
Documenta6on
High level requirements (capabilities)

29. Living
Documenta6on
A capability
Features that support this capability

30. Living
Documenta6on
Details for a feature
Stories for this feature

31. Living
Documenta6on
Pending story
Acceptance criteria for this story

32. Living
Documenta6on
Acceptance criteria
Acceptance criteria details

33. “Living Documentation
completes the circle”

34. In conclusion…
It’s
behaviour
all
the
way
down

35. Thank You
John Ferguson Smart
john.smart@wakaleo.com
wakaleo
http://www.wakaleo.com