如何断言转换器是否应用于使用 Fluent Assertions 的类型

Question

我需要应用一些复杂的逻辑来创建地图，所以我使用了如下自定义类型转换器：

cfg.CreateMap<ConsumerRequest,IEnumerable<ProviderRequest>>().ConvertUsing<RequestConverter>();

我在单元测试中使用 fluentassertions 并想断言 ConsumerRequest 已应用 RequestConverter 但不确定如何去做，我想我应该能够正确的扩展方法，该方法将对某些消息断言相同但不是确定如何实现这一目标，我们将不胜感激。

Answer 1

在 IMapper 上创建了如下扩展方法：

public static AutoMapperTypeConverterAssertions<TDestinationModel>ForType<TDestinationModel>(this IMapper subject)
{
  return new AutoMapperTypeConverterAssertions<TDestinationModel>(subject);
}

public class AutoMapperTypeConverterAssertions<TDestinationModel> : ReferenceTypeAssertions<object, AutoMapperTypeConverterAssertions<TDestinationModel>>
{
   public AutoMapperTypeConverterAssertions(object subject)
   {            
     Subject = subject;
   }

   protected override string Context => "auto mapper type converter";

   public AndConstraint<AutoMapperTypeConverterAssertions<TDestinationModel>> ShouldHaveTypeConverterApplied<TSourceModel, TConverterType>(
    string because = "", params object[] becauseArgs)
   {            
      var mapper = Subject as IMapper;
      var foundTypeInConfig = mapper
        .ConfigurationProvider
        .FindTypeMapFor<TSourceModel, TDestinationModel>()
        .TypeConverterType;

      Execute.Assertion
         .BecauseOf(because, becauseArgs)
         .ForCondition(foundTypeInConfig == typeof(TConverterType))
         .FailWith("Expected the mapping for {0} to contain {1} AutoMapper   Type Converter, but was not found.", typeof(TDestinationModel).Name,   typeof(TConverterType).Name);

  }
return new     AndConstraint<AutoMapperTypeConverterAssertions<TDestinationModel>>(this);


}

如何断言转换器是否应用于使用 Fluent Assertions 的类型

How to assert if converter is applied on a type using Fluent Assertions

unit-testing

automapping

fluent-assertions