使用Machine.Fakes和WithSubject<;T主题>;如何告诉框架在创建主题时使用特定的构造函数参

本文关键字:创建 构造函数 何告诉 WithSubject Fakes Machine lt 使用 gt 主题 框架 | 更新日期: 2023-09-27 18:29:36

我想告诉Machine.Fakes框架在创建主题时为构造函数参数使用特定值

受试者具有以下构造函数

    /// <summary>
    /// Initializes a new instance of the <see cref="CsvFileRepository{TModel}"/> class.
    /// </summary>
    /// <param name="fileService">The file service.</param>
    /// <param name="repositorySettings">The repository settings.</param>
    /// <param name="mappingFunction">The mapping function. The mapping function takes in a line from the CSV file and returns the model for said line.</param>
    public CsvFileRepository(IFileService fileService, IRepositorySettings repositorySettings, Func<string, TModel> mappingFunction)
    {
        this.FileService = fileService;
        this.RepositorySettings = repositorySettings;
        this.MappingFunction = mappingFunction;
    }

我创建了一个测试的存根,如下所示:

public class when_i_pass_a_csv_file_the_results_are_mapped_to_model_objects : WithSubject<CsvFileRepository<StandardOffer>>
{
    Establish context = () => With(new OffersInFile(new[] { OfferTestData.BobsCsvTestData, OfferTestData.JohnsCsvTestData }));
    Because of = () => result = Subject.Get();
    It should_return_the_same_number_of_fruits_as_there_are_in_the_source_repository = () => result.Count().ShouldEqual(2);
    static IEnumerable<IOffer> result;                            
}

但我不知道如何告诉Machine.Fakes为Func mappingFunction参数使用特定值。

使用Machine.Fakes和WithSubject<;T主题>;如何告诉框架在创建主题时使用特定的构造函数参

您可以在WithSubject<T>:上使用Configure()方法

Establish context = () =>
    Configure(x => x.For<Func<string, StandardOffer>>()
        .Use(input => new StandardOffer(input)));

以这种方式注册的函数优先于自动模拟。