### Question:
AdminServiceImpl implements AdminService { @Override public GroupPermissionsBO getGroup(Long id) { throwGroupNotExistById(id); return groupService.getGroupAndPermissions(id); }  @Override IPage<UserDO> getUserPageByGroupId(Long groupId, Long count, Long page); @Override boolean changeUserPassword(Long id, ResetPasswordDTO dto); @Transactional @Override boolean deleteUser(Long id); @Override boolean updateUserInfo(Long id, UpdateUserInfoDTO validator); @Override IPage<GroupDO> getGroupPage(Long page, Long count); @Override GroupPermissionsBO getGroup(Long id); @Transactional @Override boolean createGroup(NewGroupDTO dto); @Override boolean updateGroup(Long id, UpdateGroupDTO dto); @Override boolean deleteGroup(Long id); @Override boolean dispatchPermission(DispatchPermissionDTO dto); @Override boolean dispatchPermissions(DispatchPermissionsDTO dto); @Override boolean removePermissions(RemovePermissionsDTO dto); @Override List<GroupDO> getAllGroups(); @Override List<PermissionDO> getAllPermissions(); @Override Map<String, List<PermissionDO>> getAllStructualPermissions();  }### Answer:
@Test public void getGroup() { GroupDO group = GroupDO.builder().name("测试分组1").info("just for test").build(); PermissionDO permission1 = PermissionDO.builder().name("权限1").module("炉石传说").build(); PermissionDO permission2 = PermissionDO.builder().name("权限2").module("炉石传说").build(); groupMapper.insert(group); permissionMapper.insert(permission1); permissionMapper.insert(permission2); List<GroupPermissionDO> relations = new ArrayList<>(); GroupPermissionDO relation1 = new GroupPermissionDO(group.getId(), permission1.getId()); GroupPermissionDO relation2 = new GroupPermissionDO(group.getId(), permission2.getId()); relations.add(relation1); relations.add(relation2); groupPermissionMapper.insertBatch(relations); GroupPermissionsBO group1 = adminService.getGroup(group.getId()); assertEquals("测试分组1", group1.getName()); assertNotNull(group1.getId()); boolean anyMatch = group1.getPermissions().stream().anyMatch(it -> { PermissionDO p = (PermissionDO) it; return p.getName().equals("权限1"); }); assertTrue(anyMatch); }
@Test(expected = NotFoundException.class) public void getGroup1() { Random random = new Random(); GroupPermissionsBO group1 = adminService.getGroup((long) random.nextInt(100)); assertNull(group1); }