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BDD Crash Course for Testers
Gaspar Nagy
coach • trainer • bdd addict • creator of specflow
@gasparnagy • gaspar@specsolutions.eu
Copyright © Gaspar Nagy
What is BDD?
Copyright © Gaspar Nagy
BDD?
BDD is a second-generation,
outside-in, pull-based, multiple-
stakeholder, multiple-scale, high-
automation, agile methodology.
It describes a cycle of interactions
with well-defined outputs, resulting
in the delivery of working, tested
software that matters.
Dan North, Agile Testing, Specifications and BDD Exchange 2009
Copyright © Gaspar Nagy
BDD
Behavior Driven
Development
TDD
Test Driven
Development
DDD
Domain Driven Design
ATDD
Acceptance Test
Driven Development
User Stories
Specification
by Example
Definition of
Done
Outside-In
Development
DSL
Domain Specific
Language
Copyright © Gaspar Nagy
FEAR
My Story
Agile
Engineering
(XP, TDD,
pairing)
Agile
Project
Mgmt.
(Scrum, Kanban)
Agile
Requirement
Analysis
(User Story,
Acceptance
Criteria)
Agile
Testing
(bug prevention,
exploratory
testing, context-
driven)
Bug Hunting → Bug Prevention
Copyright © Gaspar Nagy
Requirements vs. Tests
As formality increases, tests and
requirements become indistinguishable.
At the limit, tests and requirements are
equivalent.
Equivalence Hypothesis (Martin, Melnik)
Pic: Martin/Melnik: Requirements and Tests
Copyright © Gaspar Nagy
Specification-By-Example
Example Tests
Specifications
consist of
describe validate fulfillment
Source: Gojko Adzic – Bridging the Communication Gap
My Story
Agile
Engineering
(XP, TDD,
pairing)
Agile
Project
Mgmt.
(Scrum, Kanban)
Agile
Requirement
Analysis
(User Story,
Acceptance
Criteria)
Agile
Testing
(bug prevention,
exploratory
testing, context-
driven)
BDD
Copyright © Gaspar Nagy
BDD
BDD =
Product Ownership +
Collaboration +
Automation
on the product
of requirements
real
Team Foundation Server Version Control
TeamFoundation Server Workitems
SpecLog
Story Maps
Product
Backlog
Sprint
Backlog
Task Board
SpecFlow Scenarios
Test-
auto-
mation
Product
Living
Documen-
tation
Our Process
Source: TechTalk (www.techtalk.at)
Planning a story with acceptance
criteria
“Imagine this story is
already implemented:
How would you verify
it?”
“I would try to put a book
into the shopping cart …”
“I would try to remove a
book from the shopping
cart…”
“I’d check whether the shopping
cart is empty, when I enter the
shop …”
Shopping cart should be
empty when entering the
shop
Gherkin Scenarios
Scenario: Books can be added to the shopping basket
Given the following books
|Author |Title |
|Martin Fowler |Analysis Patterns |
|Gojko Adzic |Bridging the Communication Gap |
And my shopping basket is empty
When I add the book “Analysis Patterns” to my shopping basket
Then my shopping basket should contain 1 copy of “Analysis Patterns”
Copyright © Gaspar Nagy
DEMO
SpecFlow in
Action
Copyright © Gaspar Nagy
Test automation is hard
Approach and Landing Tests
Source: https://en.Wikipedia.org/wiki/Approach_and_Landing_Tests
An example of using stubs…
Source: https://en.Wikipedia.org/wiki/Approach_and_Landing_Tests
Copyright © Gaspar Nagy
Test-first thinking in designing
complex applications helps a lot for
test automation efficiency
Copyright © Gaspar Nagy
Test-first is hard
• When we exploring new areas/technologies
• When we need to work with legacy systems
• When …
But this should not be an excuse but a source of
inspiration!
Copyright © Gaspar Nagy
Copyright © Gaspar Nagy
SpecFlow
Course
Kiev
9-11 November
Thank you!
See you at on scrummaster.com.ua's booth!
Gaspar Nagy
coach • trainer • bdd addict • creator of specflow
@gasparnagy • gaspar@specsolutions.eu

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QA Fest 2015. Gáspár Nagy. BDD Crash Course for Testers

  • 1. BDD Crash Course for Testers Gaspar Nagy coach • trainer • bdd addict • creator of specflow @gasparnagy • gaspar@specsolutions.eu
  • 2. Copyright © Gaspar Nagy What is BDD?
  • 3. Copyright © Gaspar Nagy BDD? BDD is a second-generation, outside-in, pull-based, multiple- stakeholder, multiple-scale, high- automation, agile methodology. It describes a cycle of interactions with well-defined outputs, resulting in the delivery of working, tested software that matters. Dan North, Agile Testing, Specifications and BDD Exchange 2009
  • 4. Copyright © Gaspar Nagy BDD Behavior Driven Development TDD Test Driven Development DDD Domain Driven Design ATDD Acceptance Test Driven Development User Stories Specification by Example Definition of Done Outside-In Development DSL Domain Specific Language
  • 6. My Story Agile Engineering (XP, TDD, pairing) Agile Project Mgmt. (Scrum, Kanban) Agile Requirement Analysis (User Story, Acceptance Criteria) Agile Testing (bug prevention, exploratory testing, context- driven)
  • 7. Bug Hunting → Bug Prevention
  • 8. Copyright © Gaspar Nagy Requirements vs. Tests As formality increases, tests and requirements become indistinguishable. At the limit, tests and requirements are equivalent. Equivalence Hypothesis (Martin, Melnik) Pic: Martin/Melnik: Requirements and Tests
  • 9. Copyright © Gaspar Nagy Specification-By-Example Example Tests Specifications consist of describe validate fulfillment Source: Gojko Adzic – Bridging the Communication Gap
  • 10. My Story Agile Engineering (XP, TDD, pairing) Agile Project Mgmt. (Scrum, Kanban) Agile Requirement Analysis (User Story, Acceptance Criteria) Agile Testing (bug prevention, exploratory testing, context- driven) BDD
  • 11. Copyright © Gaspar Nagy BDD BDD = Product Ownership + Collaboration + Automation on the product of requirements real
  • 12. Team Foundation Server Version Control TeamFoundation Server Workitems SpecLog Story Maps Product Backlog Sprint Backlog Task Board SpecFlow Scenarios Test- auto- mation Product Living Documen- tation Our Process Source: TechTalk (www.techtalk.at)
  • 13. Planning a story with acceptance criteria “Imagine this story is already implemented: How would you verify it?” “I would try to put a book into the shopping cart …” “I would try to remove a book from the shopping cart…” “I’d check whether the shopping cart is empty, when I enter the shop …” Shopping cart should be empty when entering the shop
  • 14. Gherkin Scenarios Scenario: Books can be added to the shopping basket Given the following books |Author |Title | |Martin Fowler |Analysis Patterns | |Gojko Adzic |Bridging the Communication Gap | And my shopping basket is empty When I add the book “Analysis Patterns” to my shopping basket Then my shopping basket should contain 1 copy of “Analysis Patterns”
  • 15. Copyright © Gaspar Nagy DEMO SpecFlow in Action
  • 16. Copyright © Gaspar Nagy Test automation is hard
  • 17. Approach and Landing Tests Source: https://en.Wikipedia.org/wiki/Approach_and_Landing_Tests
  • 18. An example of using stubs… Source: https://en.Wikipedia.org/wiki/Approach_and_Landing_Tests
  • 19. Copyright © Gaspar Nagy Test-first thinking in designing complex applications helps a lot for test automation efficiency
  • 20. Copyright © Gaspar Nagy Test-first is hard • When we exploring new areas/technologies • When we need to work with legacy systems • When … But this should not be an excuse but a source of inspiration!
  • 22. Copyright © Gaspar Nagy SpecFlow Course Kiev 9-11 November
  • 23. Thank you! See you at on scrummaster.com.ua's booth! Gaspar Nagy coach • trainer • bdd addict • creator of specflow @gasparnagy • gaspar@specsolutions.eu