Building Rails ActionDispatch::SystemTestCase Framework

on YouTube ↗40m

" summary

Rails 5.1 ships a concrete system test integration: ActionDispatch::SystemTestCase wires Capybara into Rails so scaffolds include Capybara + Selenium + Chrome by default, driven by a single driven_by call, runs with rails test:system, and captures screenshots on failure. The implementation fixes threaded DB transaction visibility by forcing shared connections (with help from Aaron Patterson and Matthew Draper), and the feature lands after a three‑year promise and about six months of focused work.

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" chapters (34)

1. 0:00Intro
2. 1:32IS DEAD
3. 2:063 years later...
4. 2:59Tests your application as a whole system
5. 6:37Why did it take 3 years?
6. 7:16Integration tests were slowww....
7. 8:29Basecamp
8. 10:22Guiding Principles
9. 11:10Optimize for programmer happiness
10. 11:52There is zero configuration required to use Capybara with Rails 5.1
11. 12:49Value integrated systems
12. 13:17Rails as a whole now addresses system testing
13. 13:37Progress over stability
14. 14:13When system tests were merged there were a few known bugs
15. 14:53Implementation & Architecture
16. 15:14Config defaults: Why Selenium?
17. 15:57Selenium doesn't require system installs
18. 16:19Can see the tests running in the browser
19. 16:42Better for beginners learning Rails and Capybara
20. 17:28Config defaults: Why Chrome?
21. 17:45For awhile, Firefox was broken with Selenium
22. 18:58Config defaults: Failure Screenshots
23. 20:14Database Cleaner not required
24. 20:56The first connection can't see the data inserted on the second connection
25. 22:17Test transaction opens a connection
26. 22:49Plumbing
27. 24:40Open Source Features
28. 24:56Public Work
29. 25:38Feels like everyone is judging you
30. 29:00Manage expectations
31. 29:33Know who you are building the feature for
32. 30:13Be open to change
33. 30:57Open source doesn't work without contributors
34. 31:24Build a foundation for others to work off of

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