验证验收测试数据时出现 ObjectDisposedException

Question

我正在使用 SpecFlow 进行集成测试。

在接下来的 "Then" 步中，我在行 expectedPersons.ShouldAllBeEquivalentTo(actualPersons); 处得到一个 ObjectDisposedException：

The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.

[Then(@"the following persons should be in the database")]
public void ThenTheFollowingPersonShouldBeInTheDatabase(Table table)
{
    var expectedPersons = table.Rows.Select(expected => new Person
    {
        Id = int.Parse(expected["Id"]),
        Name = expected["Name"],
        Vorname = expected["Vorname"],
        Adressen = specflowPersonenAdressen.Where(p => p.PersonId == int.Parse(expected["Id"])).ToList()
        }).ToList();

        var actualPersons = new List<Person>();

        foreach (var row in table.Rows)
        {
            var queryCriteria = new PersonQueryCriteria
            {
                NameFilter = row["Name"],
                VornameFilter = row["Vorname"]
            };
            actualPersons.AddRange(personWorkUnit.GetPersonen(queryCriteria));
        }

        expectedPersons.ShouldAllBeEquivalentTo(actualPersons);
    }
}

方法 personWorkUnit.GetPersonen(...) 如下所示：

public ICollection<Person> GetPersonen(PersonQueryCriteria queryCriteria)
{
    using (var context = this.unitOfWorkContextFactory.Create())
    {
        var personRepository = this.repositoryFactory.Create<IPersonRepository>(context);
        return personRepository.GetPersons(queryCriteria).ToList();
    }
}

方法 personRepository.GetPersons(...) 如下所示：

public ICollection<Person> GetPersons(PersonQueryCriteria personQueryCriteria)
{
    var query = this.Context.GetQuery<Person>();
    query
        .Include(q => q.Adressen)
        .Include("Adressen.Adresse");

    if (!string.IsNullOrEmpty(personQueryCriteria.NameFilter))
    {
        query = query.Where(p => p.Name == personQueryCriteria.NameFilter);
    }

    if (!string.IsNullOrEmpty(personQueryCriteria.VornameFilter))
    {
        query = query.Where(p => p.Vorname == personQueryCriteria.VornameFilter);
    }

    return query.ToList();
}

我特别包含了导航属性，因为据我所知，EF 使用延迟加载。

数据库如下所示：

Person 1 ----- * PersonAdresse * ----- 1 Adresse

模型如下所示：

 public partial class Person
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Person()
    {
        this.Adressen = new HashSet<PersonAdresse>();
    }

    public int Id { get; set; }
    public string Name { get; set; }
    public string Vorname { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<PersonAdresse> Adressen { get; set; }
}

public partial class Adresse
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Adresse()
    {
        this.Personen = new HashSet<PersonAdresse>();
    }

    public int Id { get; set; }
    public string Strasse { get; set; }
    public string Ort { get; set; }
    public int Plz { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<PersonAdresse> Personen { get; set; }
}

public partial class PersonAdresse
{
    public int Id { get; set; }
    public int PersonId { get; set; }
    public int AdresseId { get; set; }

    public virtual Adresse Adresse { get; set; }
    public virtual Person Person { get; set; }
}

抛出这个异常可能是什么问题？

提前致谢

Answer 1

这是因为激活了延迟加载。请尝试在您使用上下文的地方禁用 LazyLoadingEnabled，如下所示，

this.ContextOptions.LazyLoadingEnabled = false

验证验收测试数据时出现 ObjectDisposedException

ObjectDisposedException when validating acceptance test data

c#

.net

entity-framework

specflow