[jest 에러🔨 ] testing Animated.View for React-Native app

애니메이션이 들어간 View 컴포넌트를 테스팅하는데 이 에러가 발생한다..

ReferenceError: You are trying to `import` a file after the Jest environment has been torn down

해결방법

jest.useFakeTimers();

we enable fake timers by calling jest.useFakeTimers();. This mocks out setTimeout and other timer functions with mock functions. If running multiple tests inside of one file or describe block, jest.useFakeTimers(); can be called before each test manually or with a setup function such as beforeEach. Not doing so will result in the internal usage counter not being reset.
(beforeEach는 테스트가 실행되기 전에 초기화 시켜주는 기능을 한다.)

https://jestjs.io/docs/en/timer-mocks