1

我正在尝试验证我的基础架构。AutoFixture 说我的代码中有一个循环引用，当我省略该行为时，它无法将样本转换为我的对象类型。

绘制解决方案依赖关系图不会产生循环引用。autofixture 的输出似乎给了我一个域对象指向域对象的路径。我不明白……它们很简单。

我会继续前进，因为我有一个通过的测试，但我真的很想确保我没有不需要的循环引用。我还担心，如果在此示例中没有构建我的简单域对象，我以后将无法将 AutoFixture 用于隔离组件。

这是成功的测试：

[Fact]
[UseDataService(typeof(DatabaseVersionService))]
public void DataServiceGetsDatabaseVersionNonAutoFixture()
{
    var sut = new VersionClientProxy(new Uri(ConfigurationManager.AppSettings["DataServiceHostAddress"]));

    var expected = new DatabaseVersion()
    {
        MajorVersionId = 0,
        MinorVersionId = 0,
        BuildVersionId = 0,
        VersionId = 1
    };
     var actual = (from a in sut.DatabaseVersions
                  orderby a.VersionId descending
                  select a).FirstOrDefault();

    Assert.Equal(expected.MajorVersionId, actual.MajorVersionId);
    Assert.Equal(expected.MinorVersionId, actual.MinorVersionId);
    Assert.Equal(expected.BuildVersionId, actual.BuildVersionId);
    Assert.Equal(expected.VersionId, actual.VersionId);
}

这是失败的测试：

[Fact]
[UseDataService(typeof(DatabaseVersionService))]
public void DataServiceGetsDatabaseVersion()
{
    var fixture = new Fixture();

    var sut = fixture.Build<VersionClientProxy>().FromFactory<VersionClientProxy>((x) =>
    {
        return new VersionClientProxy(new Uri(ConfigurationManager.AppSettings["DataServiceHostAddress"]));
    }).CreateAnonymous();

    var version = fixture.Build<DatabaseVersion>().FromFactory<DatabaseVersion>((x) =>
    {
        return new DatabaseVersion { MajorVersionId = 0, MinorVersionId = 0, BuildVersionId = 0, VersionId = 1 };
    }).CreateAnonymous();
    var expected = version.AsSource().OfLikeness<DatabaseVersion>();

    var actual = (from a in sut.DatabaseVersions
                  orderby a.VersionId descending
                  select a).FirstOrDefault();
    Assert.True(expected.Equals(actual));
}

这是客户端代理（单独的项目仅引用数据模型项目）：

public class VersionClientProxy : DataServiceContext
{
    public VersionClientProxy(Uri serviceRoot)
        : base(serviceRoot, DataServiceProtocolVersion.V3)
    {
    }

    public IQueryable<DatabaseVersion> DatabaseVersions
    {
        get { return CreateQuery<DatabaseVersion>("DatabaseVersions"); }
    }
}

这是我启动的数据服务（服务在单独的项目中仅引用数据模型项目）

public class UseDataServiceAttribute : BeforeAfterTestAttribute
{
    private readonly DataServiceHost serviceHost;

    public UseDataServiceAttribute(Type serviceToHost)
    {
        serviceHost = new DataServiceHost(serviceToHost, new Uri[] { new Uri(ConfigurationManager.AppSettings["DataServiceHostAddress"]) });
    }

    public override void Before(System.Reflection.MethodInfo methodUnderTest)
    {
        try { serviceHost.Open(); }
        catch
        {
            try { serviceHost.Close(); }
            catch
            {
                try { serviceHost.Abort(); }
                catch { }
            }
        }
        base.Before(methodUnderTest);
    }

    public override void After(System.Reflection.MethodInfo methodUnderTest)
    {
        base.After(methodUnderTest);
        try { serviceHost.Close(); }
        catch
        {
            try { serviceHost.Abort(); }
            catch { }
        }
    }
}

这是数据模型类（单独的项目，由所有其他项目引用）：

public class DatabaseVersionDataModel
{
    private readonly List<DatabaseVersion> templist;
    public DatabaseVersionDataModel()
    {
        templist = new List<DatabaseVersion> { 
            new DatabaseVersion() { 
                MajorVersionId = 0, 
                MinorVersionId = 0, 
                BuildVersionId = 0, 
                VersionId = 1 } 
        };
        DatabaseVersions = templist.AsQueryable();
    }
    public IQueryable<DatabaseVersion> DatabaseVersions { get; private set; }
}

这是模型项目中的数据库版本类：

[DataServiceKey("VersionId")]
public class DatabaseVersion
{
    public int VersionId { get; set; }
    public int MajorVersionId { get; set; }
    public int MinorVersionId { get; set; }
    public int BuildVersionId { get; set; }
}

这是我的数据服务项目中的 DatabaseVersionService.svc 文件（空 asp.net，从 iisexpress 编译、调试，并且 atom 或 json 是可浏览的）：

public class DatabaseVersionService : DataService<DatabaseVersionDataModel>
{
    // This method is called only once to initialize service-wide policies.
    public static void InitializeService(DataServiceConfiguration config)
    {
        // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
        // Examples:
        // config.SetEntitySetAccessRule("MyEntityset", EntitySetRights.AllRead);
        // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All);
        config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
        config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;
    }
}

这是删除 throwingrecursionbehavior 并添加 omitonrecursionbehavior 后的输出：

结果消息：System.InvalidCastException：无法将“Ploeh.AutoFixture.Kernel.OmitSpecimen”类型的对象转换为“skeletor.Domain.DatabaseVersion”类型。结果 StackTrace：
在 Ploeh.AutoFixture.Kernel.SpecimenFactory 1.Create 2.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.NoSpecimenOutputGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.Postprocessor(Object request, ISpecimenContext context) 在 Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.<>c_ DisplayClass6.b _1(ISpecimenBuilder b) 在 System.Linq.Enumerable.WhereSelectListIterator 2.MoveNext() at System.Linq.Enumerable.WhereSelectEnumerableIterator2 .MoveNext() 在 System.Linq.Enumerable.d_a5 1 源) 在Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.Create 1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable(Object request, ISpecimenContext context) 在 Ploeh.AutoFixture.Kernel.FilteringSpecimenBuilder.Create(Object request, ISpecimenContext context)在 Ploeh.AutoFixture.Dsl.NodeComposer1.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.<>c__DisplayClass6.<Create>b__1(ISpecimenBuilder b) at System.Linq.Enumerable.WhereSelectListIterator2.MoveNext() 在 System.Linq.Enumerable.WhereSelectEnumerableIterator 2.MoveNext() at System.Linq.Enumerable.<DefaultIfEmptyIterator>d__a51.MoveNext() 在 System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable 1 source) at Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.RecursionGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.RecursionGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Dsl.CompositeNodeComposer1.Create(Object request, ISpecimenContext context) 在 Ploeh.AutoFixture.Kernel.SpecimenContext。在 Ploeh.AutoFixture.Kernel.SpecimenFactory 处解析（对象请求） 1. 在 Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder 处2.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.NoSpecimenOutputGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.Postprocessor创建（对象请求，ISpecimenContext 上下文）。<>c _DisplayClass6.b_ 1（ISpecimenBuilder b）在 System.Linq.Enumerable 处。 WhereSelectListIterator 2.MoveNext() at System.Linq.Enumerable.WhereSelectEnumerableIterator2.MoveNext() 在 System.Linq.Enumerable.d _a51.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 来源）在 Ploeh.AutoFixture.Kernel.FilteringSpecimenBuilder.Create(Object request, ISpecimenContext context) 在 Ploeh.AutoFixture.Dsl.NodeComposer 的 Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.Create(Object request, ISpecimenContext context) 1.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.<>c__DisplayClass6.<Create>b__1(ISpecimenBuilder b) at System.Linq.Enumerable.WhereSelectListIterator2.MoveNext()在 System.Linq.Enumerable.WhereSelectEnumerableIterator 2.MoveNext() at System.Linq.Enumerable.<DefaultIfEmptyIterator>d__a51.MoveNext() 在 System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source) at Ploeh.AutoFixture.Kernel.CompositeSpecimenBuilder.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.RecursionGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Kernel.RecursionGuard.Create(Object request, ISpecimenContext context) at Ploeh.AutoFixture.Dsl.CompositeNodeComposer1.在 Ploeh.AutoFixture.SpecimenFactory.CreateAnonymous[T](ISpecimenContext context, T 种子) 在 Ploeh.AutoFixture.Kernel.SpecimenContext.Resolve(Object request) 在 Ploeh.AutoFixture.SpecimenFactory.CreateAnonymous 处创建（对象请求，ISpecimenContext 上下文） [T](ISpecimenContext context) at Ploeh.AutoFixture.SpecimenFactory.CreateAnonymous[T](ISpecimenBuilderComposer composer) at Ploeh.AutoFixture.SpecimenFactory.CreateAnonymous[T](IPostprocessComposer`1 composer) at skeletor.AcceptanceTests.InfrstructureTests.DataServiceGetsDatabaseVersion() in d:\projects\skeletor\skeletor.AcceptanceTests\InfrstructureTests.cs:第 31 行

4

1 回答 1

4

假设您使用 WCF Data Services 5.* for OData V3，您可以尝试以下操作：

提供自定义 Uri：

与任何其他生成的标本一样，可以完全接管它的创作。Uri我们可以按如下方式自定义创建any ：

public class CustomUriBuilder : ISpecimenBuilder
{
    public object Create(object request, ISpecimenContext context)
    {
        if (request == typeof(Uri))
        {
            return new Uri(
                ConfigurationManager.AppSettings["DataServiceHostAddress"]);
        }

        return new NoSpecimen(request);
    }
}

使用上述自定义ISpecimenBuilder类型，每次Uri请求 a 时，Uri都会返回一个预定义的。

自定义 Fixture 实例：

DataServiceGetsDatabaseVersion现在可以重写测试：

[Fact]
[UseDataService(typeof(DatabaseVersionService))]
public void DataServiceGetsDatabaseVersion()
{
    var fixture = new Fixture();
    fixture.Customize<VersionClientProxy>(c => c.OmitAutoProperties());
    fixture.Customizations.Add(new CustomUriBuilder());
    fixture.Inject(
        new DatabaseVersion
        {
            MajorVersionId = 0,
            MinorVersionId = 0,
            BuildVersionId = 0,
            VersionId = 1
        });

    var sut = fixture.CreateAnonymous<VersionClientProxy>();
    var version = fixture.CreateAnonymous<DatabaseVersion>();
    var expected = version.AsSource().OfLikeness<DatabaseVersion>();

    var actual = (from a in sut.DatabaseVersions
                    orderby a.VersionId descending
                    select a).FirstOrDefault();

    Assert.True(expected.Equals(actual));
}

希望有帮助。

于 2013-02-27T21:24:38.937 回答