Watch changes in C++ files (#47871)

Summary:
Pull Request resolved: #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

jest/integration/config/jest.config.js

@@ -18,6 +18,7 @@ module.exports = {
     '<rootDir>/packages/react-native',
     '<rootDir>/jest/integration/runtime',
   ],
+  moduleFileExtensions: [...baseConfig.moduleFileExtensions, 'cpp', 'h'],
   // This allows running Meta-internal tests with the `-test.fb.js` suffix.
   testRegex: '/__tests__/.*-itest(\\.fb)?\\.js$',
   testPathIgnorePatterns: baseConfig.testPathIgnorePatterns,