Snapshot Everything

A brief introduction to the magic of "snapshot testing" (it's not just for the front-end)

Given at Brooklyn JS in 2017

Transcript

1. SNAPSHOT E V E R Y T H I N G
2. [ BKJS SLIDE TEST ] (on the ceiling?) (unseeable)
4. We do email stuff.
5. Falun Copper Mine Sweden, 1817
10. 2017 SELENIUM SURVEY LOVE SELENIUM DON’T LOVE SELENIUM DON’T NOT LIKE SELENIUM
11. We use Selenium. We have a fuckton of tests.
13. …the whole point of tests is to gain confidence before changing things. And to the extent that there are false negatives in the tests, or the tests gum up the works, they’re doing the opposite of that. Tests are one way to gain some confidence that a change is safe. But that’s all they are. Just one way. –Dan McKinley, Former Etsy Engineer Source: pushtrain.club
14. The whole point of tests is to gain confidence before changing things. Tests are one way to gain some confidence that a change is safe. Source: Dan McKinley’s awesome slide deck at http://pushtrain.club
15. snapshot tests!
16. snapshot tests?
24. snapshot tests!
25. Easy to write Run fast Fail fast With helpful diffs
26. >1200 functional tests in our various API services
43. @rhodesjason ſ rhodesjason $ npm install ohsnap
44. Thanks! @rhodesjason ſ rhodesjason $ npm install ohsnap