![Given
When
Then
Given
<some
iniMal
context>
[and
some
addiMonal
context]
When
<something
happens>
[and
something
else
happens]
Then
<some
expectaMon>
[and
some
more
expectaMons]](https://image.slidesharecdn.com/bdd-beyondgivenwhenthen-110921071214-phpapp02/85/Behaviour-Driven-Development-Beyond-given-when-then-16-320.jpg)
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Behaviour Driven Development - Beyond given when then
- 1. Behaviour Driven Development Beyond “Given, When, Then” Antony Marcano
- 2. The Telephone Game h<p://www.brokenpicturetelephone.com/
- 3. What is BDD? Beyond “Given, When, Then”
- 4. BDD Origins ‘ The deeper I got into TDD, the more I felt that my own journey had been less of a wax-‐on, wax-‐off process of gradual mastery than a series of blind alleys. I remember thinking “If only someone had told me that!”… I decided it must be possible to present TDD in a way that gets straight to the good stuff and avoids all the piFalls. My response is behaviour-‐driven development (BDD). Over Lme, BDD has grown to encompass the wider picture of agile analysis and automated acceptance tesLng.’ -‐Dan North
- 5. BDD Origins -‐ Shortened “ Behaviour Driven Development (BDD) builds upon Test-‐Driven Development (TDD) by formalising the good habits of the best TDD pracMMoners. ” – The Cucumber Book, Aslak Hellesøy, Ma< Wynne
- 6. Some ‘Good Habits’ Slice VerMcally Work from the outside-‐in One example at a Mme
- 8. SoWware Components SoWware Components (modules/classes) (modules/classes) Lme Lme 2009 Sprint nn IteraMon Sprint n+1… IteraMon n+1… Story User Login A User Story B Create album TradiMonally, development is sliced horizontally User Story C Share photos Sprint x IteraMon x User Story D Private albums …but defers feedback (often, until it’s too late) 8
- 9. SoWware Components (modules/classes) Lme 2009 Share photos IteraMon n Create album Share photos IteraMon n+1 VerMcal slicing Login Create album Share photos IteraMon x Private albums …results in earlier feedback 9
- 10. Work from the outside-‐in
- 11. Outside-‐in
- 12. One example at a Mme
- 13. One example at a Mme
- 14. Expressing Examples Given, When, Then And beyond
- 15. Given When Then Given <some iniMal context> When <something happens> Then <some expectaMon>
- 16. Given When Then Given <some iniMal context> [and some addiMonal context] When <something happens> [and something else happens] Then <some expectaMon> [and some more expectaMons]
- 17. A Typical IllustraMon Scenario: Login Successfully! Given I am on the home-page! When I enter the username ‘antony’! And I enter the password ‘p4$$w0rd’! And I click ‘login’! Then I should be logged in What’s wrong with this example?
- 18. A Be<er IllustraMon Scenario: Login Successfully! When I login as ‘antony’ with the password ‘p4$$w0rd’! Then I should be logged in Why is it be<er?
- 19. Task Analysis A li<le UX for our BDD
- 20. • Pitching it right… – Goals e.g. Withdraw Cash • Tasks IdenMfy to bank Request amount } Just right – (inter)acLons } Insert Card Too Enter Pin low Press “Withdraw Cash” level Enter amount Press OK
- 21. For example… When I attempt to add, the number ‘2’ and the number ’3’! task } acMons h<p://cukesalad.info
- 22. Some nice side-‐effects Encourages descripMon of UI interacMons in one place Makes it easier to execute scenarios via different interfaces
- 23. Discussion QuesMons? Ideas? Feedback?
- 24. [email protected] @AntonyMarcano [email protected] @RiverGlide/rs h<p://twi<er.com/RiverGlide/rs h<p://cukesalad.info #cukesalad h<p://RiverGlide.com @RiverGlide