Make JS and TS tests independent of react-native package name#41705
Make JS and TS tests independent of react-native package name#41705thymikee wants to merge 1 commit intofacebook:mainfrom
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| // These mappers allow out-of-tree platforms tests to seamlessly resolve RN imports | ||
| '^react-native/(.*)': '<rootDir>/packages/react-native/$1', | ||
| '^react-native$': '<rootDir>/packages/react-native/index.js', |
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Oh hey I remember hitting this back in the day for RN Windows.
Something else you will run into is resolving files correctly based on platform extension, if you end up adding visionos there (even in internals of the fork).
@tido64 you ended up building a custom resolver or config for this right? Maybe we should upstream the solution we had.
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We just upstreamed one bugfix (custom resolvers were not overridable when OOT was defined) and create a custom resolver here: callstack#32
We chose not to change the Platform and instead do something custom, because there's so much overlap between visionOS and iOS and we want to leverage 3rd party libs that rely on ios platform
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A nuance is that Jest uses a different resolver from Metro, but IIRC had some declarative fields to customize resolution. I looked it up, and here is the MSFT one I think: https://github.com/microsoft/rnx-kit/blob/main/packages/jest-preset/src/index.js
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As @NickGerleman pointed out, it's built into our Jest preset. react-native-windows uses it extensively: https://github.com/search?q=repo%3Amicrosoft%2Freact-native-windows%20%40rnx-kit%2Fjest-preset&type=code
It should work for react-native-visionos as well. If it doesn't, let me know.
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This change is 3 lines that we need vs the whole package imported. But we'll definitely consider relying on rnx-kit infra as it's already prepared for OOT platforms out there 👍🏼
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This diff seems harmless, but if this config is specific to the use case of maintaining an out-of-tree platform, I'd recommend keeping it separate from the |
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Summary:
When working with OOT platforms we need to change the
react-nativepackage name to something else, which breaks JS and TS tests. This change makes sure thatreact-nativeimports map to thepackages/react-native, allowing us to reduce the scope of the fork. It should be transparent to the core platforms.Changelog:
[INTERNAL] [FIXED] - Make JS and TS tests independent of react-native package name
Test Plan:
CI green