describe('TaskEither chaining', () => {
  it('chains successful operations', async () => {
    const result = await fetchUserWithCompany(1)()
    expect(result._tag).toBe('Right')
    if (result._tag === 'Right') {
      expect(result.right).toEqual({ user: 'User 1', company: 'Company 1' })
    }
  })

  it('fails on invalid user id', async () => {
    const result = await fetchUserWithCompany(0)()
    expect(result._tag).toBe('Left')
  })
})