Typescript Jest mock FS correctly

jestMockFsTyypescript.ts

jest.mock('fs')

import fs from 'fs'

const mockedFs = fs as jest.Mocked<typeof fs>

describe('fetch', () => {
  describe('file exists', () => {
    beforeEach(() => {
      mockedFs.existsSync.mockImplementation(() => true)
      
      // function to test
      myClass.fetch(DUMMY_PATH)
    })

    afterEach(() => {
      jest.clearAllMocks()
      jest.resetAllMocks()
    })

    it('should check if file exists', () => {
      expect(mockedFs.existsSync).toHaveBeenCalledTimes(1)
    })
  })
})