Jest

$ npm run test > expo3@1.0.0 test > jest FAIL test/App.test.tsx ● Test suite failed to run TypeError: Cannot read properties of undefined (reading 'testEnvironmentOptions') at new JSDOME ...

具体的には、以下の警告内容です。そもそもJestが初心者レベルです。 $ npm run test > expo3@1.0.0 test > jest watchman warning: Recrawled this watch 1 times, most recently because: MustScanSubDirs UserDroppedTo resolve, please r ...