Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48015
Changelog: [internal]
Right now, when we run individual Fantom tests, we compile Hermes and the RN Tester CLI as part of the test, which causes the first test to run to be very slow and the remaining tests in the same run to be very fast.
This is misleading because it makes it look like the test itself is slow, when it's actually paying a price for everyone.
Fortunately, Jest has an option to do a global setup before any tests in the project run (and it doesn't run if none of the tests in the project run, in multi-project setups), so we can use it to do the necessary warmup so it doesn't end up being attributed to individual tests.
Reviewed By: javache
Differential Revision: D66595406
fbshipit-source-id: 496aa2b248da661f7504c8445fed1edad0301803
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/47871
Changelog: [internal]
No need to keep going back to save test files when we change C++ files and need to re-run tests :)
Reviewed By: javache
Differential Revision: D66293212
fbshipit-source-id: dc232e1d3f7f8ae1578e894ce14bd21ccf3c8ade
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