无法使用SpringBoot懒洋洋地初始化角色集合

我有一个名为Company的域对象:

@Entity
@Table(name="t_company")
public class Company implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public Company() {
    }



    /**
     * @param companyName
     */ 
    public Company(String companyName) {
        super();
        this.name = companyName;
    }



    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @NotEmpty
    @Length(max = 100)
    private String name;


    @OneToMany(mappedBy = "company", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    private Set<User> users = new HashSet<>();

..
}

存储库层:

public interface CompanyRepository extends CrudRepository<Company, Long> {

    @Query("select co from Company co join co.users us where co = ?1")
    Company companyUsers (Company company);

}

@Service
@Transactional(readOnly = true)
public class CompanyService {

     @Autowired
     private CompanyRepository companyRepository;

     public Company companyUsers (Company company) {
        return companyRepository.companyUsers(company);
     }

}

Junit文件:

@Test
    public void testCompanyUsers() throws Exception {

        Iterable<Company> companies = companyService.findAll();
        Company company = companies.iterator().next();

        assertNotNull (company);

        company = companyService.companyUsers(company);
        assertTrue (((Collection<?>) company.getUsers()).size() > 0);           
    }

但是当我运行测试时,我会得到这个错误:

未能惰性地初始化角色集合: com.cor.backend.persistence.domain.backend.Company.users,无法