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

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error ReferenceError: You are trying to import a file after the Jest environment has been torn down in reactjs. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How ReferenceError: You are trying to import a file after the Jest environment has been torn down Error Occurs?

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

      at Function.bezier (node_modules/react-native/Libraries/Animated/src/Easing.js:113:21)
      at ease (node_modules/react-native/Libraries/Animated/src/Easing.js:34:24)
      at TimingAnimation._easing (node_modules/react-native/Libraries/Animated/src/Easing.js:133:18)
      at TimingAnimation.onUpdate (node_modules/react-native/Libraries/Animated/src/animations/TimingAnimation.js:107:45)

How To Solve ReferenceError: You are trying to import a file after the Jest environment has been torn down Error?

  1. How To Solve ReferenceError: You are trying to import a file after the Jest environment has been torn down Error?

    To Solve ReferenceError: You are trying to import a file after the Jest environment has been torn down Error You Should use jest.useFakeTimers() and Put the code above just after import the section in your test file.

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

    To Solve ReferenceError: You are trying to import a file after the Jest environment has been torn down Error You Should use jest.useFakeTimers() and Put the code above just after import the section in your test file.

Solution 1

You Should use jest.useFakeTimers() and Put the code above just after import the section in your test file.

Solution 2

@testing-library/react-native, so what I did is use cleanup in the setup file.

// jest.setup.js
import { cleanup } from '@testing-library/react-native';

afterEach(cleanup);

Solution 3

jest.useFakeTimers()

With the above it’s extremely important to understand this jest.useFakeTimers() 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.

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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