[英]Preventing Autofixture from filling child collections
I'm using the latest version of Autofixture, and I'd like to prevent it from filling automatically child collections. 我正在使用最新版本的Autofixture,我想阻止它自动填充子集合。
For example, I have a class Person that has a List property. 例如,我有一个具有List属性的Person类。 I want all properties filled, except the list.
我想要填写所有属性,列表除外。
I tried using this customization : 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));
}
}
But it also prevents me from using .CreateMany()
. 但它也阻止我使用
.CreateMany()
。
edit: I can use .CreateMany(3)
and it works. 编辑:我可以使用
.CreateMany(3)
,它的工作原理。
Is there a setting somewhere that could let me autofill collections only when I need to? 是否有某个设置可以让我只在我需要时自动填充集合?
edit2: Class person should look like this: 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; }
}
}
Note that it's not always a Collection
, but sometimes IList
请注意,它并不总是一个
Collection
,但有时是IList
Note2: I just realized that someone also removed the Customization for IEnumerable
hence why the CreateMany()
doesn't create anything. 注意2:我刚才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。
Here's one way to do it. 这是一种方法。
Start by implementing a SpecimenBuilder that tells AutoFixture to skip assigning a value for collection property: 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);
}
}
Then encapsulate that in a Customization: 然后将其封装在Customization中:
public class DoNotFillCollectionProperties : ICustomization
{
public void Customize(IFixture fixture)
{
fixture.Customizations.Add(new CollectionPropertyOmitter());
}
}
The following tests now pass: 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);
}
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