BDD in Javascript
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BDD originated from TDD, which developers found too difficult to understand. BDD uses natural language like Gherkin to describe software behaviors and scenarios in a simpler way for developers and non-developers. It focuses on high-level checks of interfaces and APIs rather than unit tests. BDD can be used together with TDD and is most useful for agile organizations, but requires significant investment and documentation.
BDD in Javascript
- 1. BDD in JavaScriptBDD in JavaScript
- 2. SUMMARYSUMMARY Origins TDD & BDD or TDD vs BDD ? Demo Pros/cons
- 3. BDD comes from TDDBDD comes from TDD Introduces in 2006 in Better Software magazine - Dan North
- 4. TDD was too hard to explainTDD was too hard to explain Developers didn't use TDD
- 5. Yeah, keep in mind theyYeah, keep in mind they were Java Developerwere Java Developer
- 6. BDD must be simplerBDD must be simpler to understandto understand
- 7. BBehaviorehavior DDrivenriven DDevelopmentevelopment Don't write a test, describe a behaviour !
- 8. Use a natural langageUse a natural langage GherkinGherkin
- 9. Feature: getNumberOfSuperLi Scenario: There is no Super li elements Given QuerySelector API returns an empty array When it returns the number of found elements Then the number of found elements should be 0 Natural langageNatural langage
- 10. ™ Actually, the well known solution to write BDD scenario in "natural language"
- 11. BDD is testing forBDD is testing for non-developernon-developer
- 12. So, I can make TDD with BDD ?So, I can make TDD with BDD ? Yes !Yes !
- 13. But, you should not do thatBut, you should not do that BDD is too fat for unit testingBDD is too fat for unit testing
- 14. Natural langage to codeNatural langage to code Is expensiveIs expensive
- 16. BDD is for high level checkingBDD is for high level checking like User Interfacelike User Interface or APIor API
- 18. BDD & TDD can beBDD & TDD can be used togetherused together
- 20. ProsPros More comprehensive Can be written by every one, including PO ! Ensure all pieces work well together
- 21. CONSCONS Ask a strong investissement
- 22. CONCLUSIONCONCLUSION BDD is really powerful in an agile organisation Like TDD, it should not be a dogma Can be seen like write it own testing framework ...
- 23. Some questions ?Some questions ? github.com/js-republic/nightwatch-cucumber-example github.com/js-republic/cucumber-slice-by-slice slides.com/mbreton/tdd-in-javascript mucsi96.github.io/nightwatch-cucumber/