}

    // Error propagation: reauthenticate throws CIFSException
    @Test
    @DisplayName("reauthenticate throws CIFSException when underlying call fails")
    void reauthenticate_throws() throws CIFSException {
        doThrow(new CIFSException("reauth failed")).when(session).reauthenticate();
        CIFSException ex = assertThrows(CIFSException.class, () -> session.reauthenticate());