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by MarcelOlsz 585 days ago
Can't tell you how much I love it for testing, it's basically the only thing I use it for. I now have a test suite that can rebuild my entire app from the ground up locally, and works in the cloud as well. It's a huge motivator actually to write a piece of code with the reward being the ability to send it to the LLM to create some tests and then seeing a nice stream of green checkmarks.
2 comments
highfrequency 585 days ago
> I now have a test suite that can rebuild my entire app from the ground up

What does this mean?

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MarcelOlsz 585 days ago
Sorry, should have been more clear. Firebase is (or was) a PITA when I started the app I'm working on a few years ago. I have a lot of records in my db that I need to validate after normalizing the data. I used to have an admin page that spit out a bunch of json data with some basic filtering and self-rolled testing that I could verify at a glance.

After a few years off from this project, I refactored it all, and part of that refactoring was building a test suite that I can run. When ran, it will rebuild, normalize, and verify all the data in my app (scraped data).

When I deploy, it will also run these tests and then email if something breaks, but skip the seeding portion.

I had plans to do this before but the firebase emulator still had a lot of issues a few years ago, and refactoring this project gave me the freedom to finally build a proper testing environment and make my entire app make full use of my local firebase emulator without issue.

I like giving it my test cases in plain english. It still gets them wrong sometimes but 90% of the time they are good to go.

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rr808 585 days ago
I struggle to get github copilot to create any unit tests that provide any value. How to you get it to create really useful tests?
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BillyTheKing 585 days ago
Would recommend to try out anthropic sonnet 3.5 for this one - usually generates decent unit tests for reasonably sized functions
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MarcelOlsz 585 days ago
I use claude-3-5-sonnet-20241022 with a very explicit .cursorrules file with the cursor editor.
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ponector 585 days ago
Can you share your .cursorrules? For me cursor is not much better than autocomplete, but I'm writing mostly e2e tests.
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MarcelOlsz 585 days ago
You can find a bunch on https://cursor.directory/.
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