@Test
  public void shouldProposeLiftInstallationWhenLiftIsNotInstalled() {
    liftService.liftExists = false;

    controller.selectStartScreen();

    assertEquals(ScreenFlowManager.Form.INSTALL_LIFT_QUESTION, screenFlowManager.getNextScreen());
  }
  @Test
  public void shouldOpenLiftFormWhenLiftIsInstalled() {
    controller.selectStartScreen();

    assertEquals(ScreenFlowManager.Form.LIFT_FORM, screenFlowManager.getNextScreen());
  }