Encourage TDD with PHP-VCR

Test First Approach with PHP-VCR

Transcript

1. Encourage TDD With PHP-VCR Ryo Tomidokoro PHP Study 2019/2/27 @hanhan1978
2. PHP-VCR?
3. https://php-vcr.github.io/
4. VCR?
5. Video Casset Recorder
6. How to Use
7. PHP-VCR | Record HTTP interactions while testing https://php-vcr.github.io/
8. Record Response
9. Request & Response Recorded as YML
10. Replace API-Request to PHP-VCR -> Easy way to tests HTTP Request. -> Faster than actual HTTP Request.
11. When to Use
12. Let’s say you have a legacy app
13. Legacy App
14. Replace external API with PHP-VCR
15. Legacy App now becomes testable
16. But, wait
17. Shouldn’t we use mock?
18. Desired Architecture
19. Of course we prefer mock
20. A chiken or egg situation - Loosely coupled architecture is desirable - Legacy app have a long way to achieve it
21. No tests until good architecture?
22. Yes
23. Test First
24. Create tests for the legacy app with PHP-VCR It’s will support your refactoring until you achive your desirable architecture.
25. How to Bent Wood | Ahoy! http://www.ventspleen.com/how-to-bend-wood/ It’s a jig for a legacy app
26. When refactoring ends - You can choose wheather to use Mock or PHP-VCR - PHP-VCR is a great tool guiding you to achieve a better software architecture.
27. Precaution
28. Needs soap extension Example setup for CircleCI 2.0
29. Headers match may be too strict Development environment & CI environment might use slightly diffrent version of UserAgent. Ignore strict headers match at this situation.
30. curl_getinfo is not recorded (yet) https://github.com/php-vcr/php-vcr/pull/210 It’s in PR, but not yet merged. Using curl_getinfo, PHP-VCR will not work.
31. How PHP-VCR record Requests?
32. stream_wapper_register http://php.net/manual/en/function.stream-wrapper-register.php
33. Example
34. HTTP Request
35. HTTP Response
36. Capture HTTP Request & Replace Response
38. Replaced Response
39. Summary PHP-VCR allows you to write tests for legacy Apps. Use ‘Test Fast’ approach to improve the software architecture
40. Thanks!! @hanhan1978 https://blog.hanhans.net Ryo Tomidokoro