Compatibility with vitest?

[redbar0n]

This Project is tested to work with Jest, but it should work with other test runners as well.

https://testing-library.com/docs/react-native-testing-library/intro/

Just wondering if someone has had it working with Vitest?

[thymikee]

Hey, why not. Would you like to contribute example setup? :)

[mdjastrzebski]

We try no to added any code that would force running on Jest, so there are high changes that RNTL will work with it out-of-the-box or with minor tweaks. However this is something we didn't try yet.

[YuriiLutsykSPRO]

I've been working with vitest-react-native, react-native(web as well) and testing-library for month or longer. There are millions of limitations, but together we can manage any issues

[mdjastrzebski]

@YuriiLutsykSPRO can you elaborate more on your setup, whether it works faster (people frequently mention vitest as faster than Jest), the limitations. I am open to adding support for Vitest in RNTL if that would be a feasible option for testing.

[YuriiLutsykSPRO]

My setup is pretty simple now, i use the same setup as the https://github.com/sheremet-va/vitest-react-native library recomends, First and most important limitations is we can't mock libraries related to react native (as unistyles) in test/setupFiles, i didn't fix it. vitest-react-native isn't very reliable. Currently i'm working on fix for testing-library-react-native or react, because i can't use the functions as getByTestId and getByText with vitest

[YuriiLutsykSPRO]

I don't have a lot of tests to test properly the speed, but looks like vitest is faster than jest, but it' only my first assumption

[timheilman]

I have been very impressed with vitest and so I am very interested in trying to use vitest with react-native-testing-library. I am just getting started by doing web searches to see what experience others have had attempting this integration. Your optimism is inspiring, @YuriiLutsykSPRO !

I found this issue regarding ESM/CJS incompatibilities: sheremet-va/vitest-react-native#15

I am very early in my attempt, just researching, haven't even installed anything yet, but if CJS/ESM issues are likely to come up I'd love to hear any tips and tricks. This is something that seems to be solved in the jest+react-native-testing-libary world using package.json configuration

{ ...
  "jest": {
    ...
    "transformIgnorePatterns": [ ... ]
   }
}

Is there an equivalent needed in the vitest+react-native-testing-library situation?

[redbar0n]

Maybe https://VxRN.dev would help: Using Vite instead of Metro for RN. Maybe @natew has some experience with testing with this setup.