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dmytrorykun
7e80855357
## Summary
This PR fixes the `fastAddProperties` function. Now it nullifies a prop
if it was defined in one of the items of a style array, but then set to
`undefined` or `null` in one of the subsequent items. E.g. `style:
[{top: 0}, {top: undefined}]` should evaluate to `{top: null}`. Also
added a test case for that.
## How did you test this change?
```
yarn test packages/react-native-renderer -r=xplat --variant=false
yarn test packages/react-native-renderer -r=xplat --variant=true
yarn flow native
```
DiffTrain build for commit https://github.com/facebook/react/commit/f510ece86d4621d3b0faf9fe59d850f7807dbb16.