依赖注入 – 为什么Autofixture w / AutoMoqCustomization在类密

但是,当我使用Autofixture与AutoMoqCustomization,冻结IBuilderFactory的模拟并使用fixture.Create< BuilderService>实例化BuilderService时,我得到以下异常：

System.ArgumentException: Can not instantiate proxy of class: OddBehaviorTests.CubeBuilder. Could not find a parameterless
constructor. Parameter name: constructorArguments

如果我将CubeBuilder密封(用IBuilderFactoryForSealedBuilder.Create()调用的密封类SealedCubeBuilder代替它,测试将使用AutoFixture与AutoMoqCustomization一起传递,没有异常抛出.

我错过了什么吗？由于我直接使用Moq进行测试,我相信这与Autofixture和/或AutoMoqCustomization有关.这是理想的行为吗？如果是这样,为什么？

要重现,我正在使用：

using Moq;
using Ploeh.AutoFixture;
using Ploeh.AutoFixture.AutoMoq;
using Xunit;

以下是说明行为的四个测试：

public class BuilderServiceTests {
    [Fact]
    public void CubeBuilderFactoryCreateMethodShouldBeCalled_UsingMoq() {
        var factory = new Mock<IBuilderFactory>();
        var sut = new BuilderService(factory.Object);
        sut.Create();
        factory.Verify(f => f.Create(),Times.Once());
    }
    [Fact]
    public void CubeBuilderFactoryCreateMethodShouldBeCalled_UsingAutoFixture() {
        var fixture = new Fixture().Customize(new AutoMoqCustomization());
        var factory = fixture.Freeze<Mock<IBuilderFactory>>();
        var sut = fixture.Create<BuilderService>();
        sut.Create(); // EXCEPTION THROWN!!
        factory.Verify(f => f.Create(),Times.Once());
    }
    [Fact]
    public void SealedCubeBuilderFactoryCreateMethodShouldBeCalled_UsingMoq() {
        var factory = new Mock<IBuilderFactoryForSealedBuilder>();
        var sut = new BuilderServiceForSealedBuilder(factory.Object);
        sut.Create();
        factory.Verify(f => f.Create(),Times.Once());
    }
    [Fact]
    public void SealedCubeBuilderFactoryCreateMethodShouldBeCalled_UsingAutoFixture() {
        var fixture = new Fixture().Customize(new AutoMoqCustomization());
        var factory = fixture.Freeze<Mock<IBuilderFactoryForSealedBuilder>>();
        var sut = fixture.Create<BuilderServiceForSealedBuilder>();
        sut.Create();
        factory.Verify(f => f.Create(),Times.Once());
    }
}

以下是必需的类：

public interface IBuilderService { IBuilder Create(); }
public class BuilderService : IBuilderService {
    private readonly IBuilderFactory _factory;
    public BuilderService(IBuilderFactory factory) { _factory = factory; }
    public IBuilder Create() { return _factory.Create(); }
}
public class BuilderServiceForSealedBuilder : IBuilderService {
    private readonly IBuilderFactoryForSealedBuilder _factory;
    public BuilderServiceForSealedBuilder(IBuilderFactoryForSealedBuilder factory) { _factory = factory; }
    public IBuilder Create() { return _factory.Create(); }
}

public interface IBuilderFactoryForSealedBuilder { SealedCubeBuilder Create(); }
public interface IBuilderFactory { CubeBuilder Create(); }
public interface IBuilder { void Build(); }

public abstract class Builder : IBuilder {
    public void Build() { } // build stuff 
}

public class CubeBuilder : Builder {
    private Cube _cube;
    public CubeBuilder(Cube cube) { _cube = cube; }
}

public sealed class SealedCubeBuilder : Builder {
    private Cube _cube;
    public SealedCubeBuilder(Cube cube) { _cube = cube; }
}

public class Cube { }