### Question:
RoleServiceImpl implements RoleService { public DJRole findRoleByRoleId(Integer id) { return roleDao.findRoleById(id); }  void setRoleDao(RoleDao roleDao); void setSystemDao(SystemDao systemDao); DJRole findRoleByRoleId(Integer id); void insertRole(DJRole role); void updateRole(DJRole role);  }### Answer:
@Test public void testFindRoleByRoleId() throws Exception { }