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[react-native] Add unit test to ReactNativeAttributePayload #28955

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javache
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@javache javache commented Apr 30, 2024

Summary

I'm looking at cleaning up some unnecessary manual property flattening in React Native and wanted to verify this behaviour is working as expected, where properties from nested objects will always overwrite properties from the base object.

How did you test this change?

Unit tests

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@rickhanlonii rickhanlonii left a comment

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thanks i hate it

const validAttributes = {foo: true, style: {foo: true}};
expect(diff({}, {foo: 4, style: {foo: 2}}, validAttributes)).toEqual({
foo: 2,
});
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Wow really?

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Yuup.. which means code like https://github.com/facebook/react-native/blob/main/packages/react-native/Libraries/Components/View/View.js#L103 is unnecessary

For most native props on View etc, we allow them as valid attributes as a direct prop and as style..

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Oh wait is this only for style properties, I remember that now.

But what happens if you have custom native component that defines a backgroundColor prop?

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Comparing: 190cc99...2573291

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable/react-dom/cjs/react-dom.production.js = 6.66 kB 6.66 kB +0.05% 1.82 kB 1.82 kB
oss-experimental/react-dom/cjs/react-dom.production.js = 6.67 kB 6.67 kB +0.05% 1.83 kB 1.83 kB
facebook-www/ReactDOM-prod.classic.js = 591.11 kB 591.11 kB = 103.94 kB 103.94 kB
facebook-www/ReactDOM-prod.modern.js = 567.33 kB 567.33 kB = 100.34 kB 100.34 kB
test_utils/ReactAllWarnings.js Deleted 64.26 kB 0.00 kB Deleted 16.02 kB 0.00 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
test_utils/ReactAllWarnings.js Deleted 64.26 kB 0.00 kB Deleted 16.02 kB 0.00 kB

Generated by 🚫 dangerJS against 2573291

@javache javache merged commit d779eba into facebook:main Apr 30, 2024
37 of 38 checks passed
@javache javache deleted the test-attributes-with-multiple-definitions branch September 27, 2024 15:31
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4 participants