def METHOD_NAME(self):
    fork_state = qrlstateinfo_pb2.ForkState(
        initiator_headerhash=b'block2_right',
        fork_point_headerhash=b'block0_base_of_fork',
        old_mainchain_hash_path=[b'block1_right', b'block2_right'],
        new_mainchain_hash_path=[b'block1_left', b'block2_left']
    )
    self.assertIsNone(self.state.get_fork_state())
    self.state.put_fork_state(fork_state)
    self.assertEqual(fork_state, self.state.get_fork_state())
    self.state.delete_fork_state()
    self.assertIsNone(self.state.get_fork_state())