8bf7a34d02
Summary: X-link: https://github.com/facebook/react-native/pull/53133 # Changelog: [Internal] - As part of the ongoing effort to migrate the React Native codebase to Kotlin, this PR introduces the initial setup required for Kotlin support in Yoga. - Added initial basic Kotlin configuration to the project. - Migrated `YogaConstants` as an initial file to try out the first migration steps. Pull Request resolved: https://github.com/facebook/yoga/pull/1829 Test Plan: - Tested the migrated class directly against facebook/react-native, see the PR [here](https://github.com/facebook/react-native/pull/52998). - Run: `./gradlew :yoga:assembleDebug` & `./gradlew :yoga:compileDebugSources` I am not able to run the Java tests in this repo (even before the initial Kotlin setup) – not sure if I am missing something there but any pointers are welcome – it seems like there is some missing configuration. Currently trying with `./gradlew :yoga:test` Reviewed By: cortinico Differential Revision: D79545992 Pulled By: rshest fbshipit-source-id: 8257ff53e6b6f2436980be98b6c94e1ac526b207
Yoga 
Yoga is an embeddable and performant flexbox layout engine with bindings for multiple languages.
Building
Yoga's main implementation targets C++ 20 with accompanying build logic in CMake. A wrapper is provided to build the main library and run unit tests.
./unit_tests <Debug|Release>
While not required, this script will use ninja if it is installed for faster builds.
Yoga is additionally part of the vcpkg collection of ports maintained by Microsoft and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.
Adding Tests
Many of Yoga's tests are automatically generated, using HTML fixtures describing node structure. These are rendered in Chrome to generate an expected layout result for the tree. New fixtures can be added to gentest/fixtures.
<div id="my_test" style="width: 100px; height: 100px; align-items: center;">
<div style="width: 50px; height: 50px;"></div>
</div>
To generate new tests from added fixtures:
- Ensure you have yarn classic installed.
- Run
yarn installto install dependencies for the test generator. - Run
yarn gentestin theyogadirectory.
Debugging
Yoga provides a VSCode "launch.json" configuration which allows debugging unit tests. Simply add your breakpoints, and run "Debug C++ Unit tests (lldb)" (or "Debug C++ Unit tests (vsdbg)" on Windows).