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Joshua Gross
967eeff86e
Summary: Add unit tests for Layout Animations. This first batch generates a random mutation, then animates it to completion. I found one issue with UPDATE+REMOVE+INSERT animation consistency. That shouldn't cause any crashes in production, but is a chance to improve consistency of mutations overall - and could in theory point to memory corruption, though it's somewhat unlikely. I ran with randomized seeds, found issues, fixed them, re-ran to ensure issues were fixed, rinsed and repeated. At the end I was able to run dozens of times (with random seeds) and found nothing. The next step is to repeatedly generate mutations that conflict with ongoing animations. Changelog: [Internal] Reviewed By: sammy-SC Differential Revision: D28343750 fbshipit-source-id: c1c60d89a31be3ac05d57482f0af3c482b866abe