AutoFixture 支持 .NET6 的 `DateOnly` 吗？

Question

我在使用 AutoFixture 构造 DateOnly 变量/字段时遇到异常。 （TimeOnly 的构建工作正常）

AutoFixture.ObjectCreationExceptionWithPath ：AutoFixture 无法从 System.DateOnly 创建实例，因为创建意外失败并出现异常。请参考内部异常来排查失败的根本原因。

AutoFixture、AutoFixture.NUnit3 nugets 版本：4.17.0

using AutoFixture;
using AutoFixture.NUnit3;
using NUnit.Framework;

namespace UnitTests
{
  [TestFixture]
  public class AutoFixtureCreateTests
  {
    private readonly Fixture fixture = new();

    [SetUp]
    public void Setup()
    {
      var date = fixture.Create<DateOnly>();  //fails
      var time = fixture.Create<TimeOnly>();  //works fine
    }

    [Test, AutoData]
    public void CreateString(string str) { } //works fine

    [Test, AutoData]
    public void CreateDateOnly(DateOnly date) { } //fails

    [Test, AutoData]
    public void CreateTimeOnly(TimeOnly time) { } //works fine
  }
}

Answer 1

答案：目前还没有。 有一个拉取请求：https://github.com/AutoFixture/AutoFixture/pull/1305 （然而它处于开放状态快一年了，没有任何里程碑）

但是有一个解决方法。 我的临时解决方案是创建 AutoFixture 自定义 (CustomFixture.cs) 文件并将其包含到项目中：

using AutoFixture;
using AutoFixture.NUnit3;

namespace UnitTests
{
  public class CustomFixture
  {
    public static Fixture Create()
    {
      var fixture = new Fixture();
      fixture.Customize<DateOnly>(composer => composer.FromFactory<DateTime>(DateOnly.FromDateTime));
      return fixture;
    }
  }

  public class CustomAutoDataAttribute : AutoDataAttribute
  {
    public CustomAutoDataAttribute()
      : base(()=>CustomFixture.Create())
    {}
  }
}

在测试代码中包含自定义之后：

using AutoFixture;
using AutoFixture.NUnit3;
using NUnit.Framework;

namespace UnitTests
{
  [TestFixture]
  public class AutoFixtureCreateTests
  {
    private readonly Fixture fixture = 
      CustomFixture.Create();  //custom factory

    [SetUp]
    public void Setup()
    {
      var date = fixture.Create<DateOnly>();  //now works
      var time = fixture.Create<TimeOnly>();  
    }

    [Test, AutoData]
    public void CreateString(string str) { } 

    [Test, CustomAutoData] //custom attribute
    public void CreateDateOnly(DateOnly date) { } //now works

    [Test, AutoData]
    public void CreateTimeOnly(TimeOnly time) { } 
  }
}

Answer 2

不，但将来可能会发生（参见@Evgeny 的回答）。在代码中实现它的一种方法是为 dateonly 和 timeonly 创建可重用的固定装置自定义：

public class DateOnlyFixtureCustomization: ICustomization
{

    void ICustomization.Customize(IFixture fixture)
    {
        fixture.Customize<DateOnly>(composer => composer.FromFactory<DateTime>(DateOnly.FromDateTime));
    }
}

public class TimeOnlyFixtureCustomization: ICustomization
{

    void ICustomization.Customize(IFixture fixture)
    {
        fixture.Customize<TimeOnly>(composer => composer.FromFactory<DateTime>(TimeOnly.FromDateTime));
    }
}

然后可以在创建新夹具时使用它们，如下所示：

var fixture = new Fixture().Customize(new CompositeCustomization(
            new DateOnlyFixtureCustomization(),
            new TimeOnlyFixtureCustomization()
            // Add other fixture customizations as needed
        ));