Question

我正在做一个非常简单的测试，我想将属性的值保留在目标实体中。

我有2节课：

public class Model_Source
{
    public  int Prop_A { get; set; }
    public string Prop_B { get; set; }
    public string Prop_C { get; set; }
}

public class Model_Destination
{
    public int Prop_A { get; set; }
    public string Prop_B { get; set; }
    public string Prop_C { get; set; }
}

我已经配置了自动映射器，以将 Model_Destination 类别的 Prop_C 的目标值保持不变：

public class AutomapperProfileSetting : Profile
{
    public AutomapperProfileSetting()
    {
        //<TSource, TDestination>

        this.CreateMap<Model_Source, Model_Destination>()
            .ForMember(source => source.Prop_C, opt => opt.UseDestinationValue());
     }
}

这是我使用xunit的测试方法：

    [Fact]
    public async Task MapTest_UseDestinationValue()
    {

        //ARRANGE
        //----------------------
        //auto mapper configuration
        var mockMapper = new MapperConfiguration(cfg =>
        {
            cfg.AddProfile(new AutomapperProfileSetting());
        });

        IMapper mapper = mockMapper.CreateMapper();

        Model_Source model_Source = new Model_Source();
        model_Source.Prop_A = 111;
        model_Source.Prop_B = "Source VALUE B";
        model_Source.Prop_C = "Source VALUE C";

        Model_Destination model_Destination = new Model_Destination();
        model_Destination.Prop_A = 222;
        model_Destination.Prop_B = "Destination VALUE B";
        model_Destination.Prop_C = "Destination VALUE C - UNCHANGED";



        //ACT
        //----------------------
        model_Destination = mapper.Map<Model_Source, Model_Destination>(model_Source);


    }

测试运行后，model_Destination属性值为：

model_Destination.Prop_A == 222  //<--NOT EXPECTED
model_Destination.Prop_B == "Destination VALUE B"  //<--NOT EXPECTED
model_Destination.Prop_C == "Source VALUE C" //<--NOT EXPECTED, was expecting "Destination VALUE C - UNCHANGED"???

我期望的model_Destination属性值的值为：

model_Destination.Prop_A == 111
model_Destination.Prop_B == "Source VALUE B"
model_Destination.Prop_C == "Destination VALUE C - UNCHANGED"

最后，Prop_C应该没有被更改，值应该是“ Destination VALUE C-UNCHANGED”，为什么？

p.s。我使用的是AutoMapper.Extensions.Microsoft.DependencyInjection v6.0.0，具有对automapper 8.0.0和.net core 2.2.0的依赖关系

Automapper UseDestinationValue仍会映射源属性值，而不是保留目标值

0 个答案: