Add `jest.useFakeTimers()` in jestSetup.js

[heecheolman]

Description

✅ Success Case

• When we used "react-native-reanimated" package, jest test success.
• Because "react-native-reanimated" jestUtils included jest.useFakeTimers()
  • https://github.com/software-mansion/react-native-reanimated/blob/main/src/reanimated2/jestUtils.ts#L155

❌ Fail Case

• When we unused "react-native-reanimated" package, Jest test will be failed. (exit code 1)
  • Jest Error message: "You are trying to access a property or method of the Jest environment after it has been torn down" (https://github.com/jestjs/jest/blob/d4d1f2b8004b1eb4bf0cf862698dd1142e13278f/packages/jest-runtime/src/index.ts#L2228)

👉 So, I added jest.useFakeTimers() in jestSetup.js

Test plan

1. Setup project, without "react-native-reanimated" package.
2. Setup Jest
3. Write this simple test code.

import { GestureDetector, Gesture } from 'react-native-gesture-handler';
import { Text } from 'react-native';
import { render, screen } from '@testing-library/react-native';

describe('Test', () => {
  it('Success', () => {
      function TestComponent() {
        const gesture = Gesture.Pan().onEnd(() => {});

        return (
          <GestureDetector gesture={gesture}>
              <Text>DummyText</Text>
          </GestureDetector>
      }

      render(<TestComponent />);
      expect(screen.getByText('DummyText')).toBeOnTheScreen();
  });
})

[j-piasecki]

Can you share more details about the setup where your tests were failing? Like the versions of:

• react-native-gesture-handler
• react
• react-native
• @testing-library/react-native
• react-test-renderer

Or preferably, can you set up a repository with a project where the test is failing because of Gesture Handler?