Summary: X-link: https://github.com/facebook/react-native/pull/42411 Pull Request resolved: https://github.com/facebook/yoga/pull/1562 I added a small regression D52605596, where negative border would not be correctly floored. This fixes that, and starts adding tests specifically targeting the computed style API, now decoupled from the yoga node. Reviewed By: joevilches Differential Revision: D52930827 fbshipit-source-id: e165dade705a8de54c92d65f3664c9081137788c