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,列表除外.
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),它的工作原理.
是否有某个设置可以让我只在我需要时自动填充集合？
edit2：班级人员应如下所示：
[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,它并不总是一个集合,但有时是IList
注意2：我刚刚意识到有人也删除了IEnumerable的Customization,因此CreateMany()为什么不创建任何东西.
解决方法
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());
}
}
以下测试现在通过：
[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);
}
