Question

我正在使用最新版本的Autofixture，我想阻止它自动填充子集合。

例如，我有一个具有List属性的Person类。我想要填写所有属性，除了列表。

我尝试使用此自定义：

public class RemoveMultiples : ICustomization
{
    public void Customize(IFixture fixture)
    {
        fixture.Customizations
            .OfType<FilteringSpecimenBuilder>()
            .Where(x => x.Specification is DictionarySpecification)
            .ToList().ForEach(c => fixture.Customizations.Remove(c));
        fixture.Customizations
            .OfType<FilteringSpecimenBuilder>()
            .Where(x => x.Specification is CollectionSpecification)
            .ToList().ForEach(c => fixture.Customizations.Remove(c));
        fixture.Customizations
            .OfType<FilteringSpecimenBuilder>()
            .Where(x => x.Specification is HashSetSpecification)
            .ToList().ForEach(c => fixture.Customizations.Remove(c));
        fixture.Customizations
            .OfType<FilteringSpecimenBuilder>()
            .Where(x => x.Specification is ListSpecification)
            .ToList().ForEach(c => fixture.Customizations.Remove(c));
    }
}

但它也阻止我使用.CreateMany()。

编辑：我可以使用.CreateMany(3)并且它可以正常工作。

是否有某个设置可以让我只在我需要时自动填充收藏？

edit2：上课的人应该是这样的：

[Serializable]
public class Person
{
    private ICollection<OtherClass> _otherClasses; 
    private string _something;
    public virtual ICollection<OtherClass> OtherClasses
    {
        get { return _otherClasses; }
        set { _otherClasses = value; }
    }
}

请注意，它并非始终为Collection，有时为IList

注意2：我刚才意识到有人也删除了IEnumerable的自定义，因此CreateMany()无法创建任何内容。

Answer 1

这是一种方法。

首先实现一个SpecimenBuilder，告诉AutoFixture跳过为collection属性赋值：

public class CollectionPropertyOmitter : ISpecimenBuilder
{
    public object Create(object request, ISpecimenContext context)
    {
        var pi = request as PropertyInfo;
        if (pi != null
            && pi.PropertyType.IsGenericType
            && pi.PropertyType.GetGenericTypeDefinition() == typeof(ICollection<>))
            return new OmitSpecimen();

        return new NoSpecimen(request);
    }
}

然后将其封装在Customization：

中

public class DoNotFillCollectionProperties : ICustomization
{
    public void Customize(IFixture fixture)
    {
        fixture.Customizations.Add(new CollectionPropertyOmitter());
    }
}

现在通过以下测试：

[Fact]
public void CreatePersonWithoutFillingCollectionProperty()
{
    var fixture = new Fixture().Customize(new DoNotFillCollectionProperties());
    var actual = fixture.Create<Person>();
    Assert.Null(actual.OtherClasses);
}

[Fact]
public void CreateManyStillWorks()
{
    var fixture = new Fixture().Customize(new DoNotFillCollectionProperties());
    var actual = fixture.CreateMany<Person>();
    Assert.NotEmpty(actual);
}

[Fact]
public void CreatListStillWorks()
{
    var fixture = new Fixture().Customize(new DoNotFillCollectionProperties());
    var actual = fixture.Create<List<Person>>();
    Assert.NotEmpty(actual);
}

[Fact]
public void CreateCollectionStillWorks()
{
    var fixture = new Fixture().Customize(new DoNotFillCollectionProperties());
    var actual = fixture.Create<ICollection<Person>>();
    Assert.NotEmpty(actual);
}

防止Autofixture填充子集合

1 个答案: