Question

在Abp框架中，我试图为FamilyAppService类编写一个测试（请参见下文）。我需要在FamilyAppService的构造函数中模拟IAutho实例。我尝试模拟IAutho，然后将其添加到FamilyAppService的新实例中（而不是使用GetRequiredService（）），但是ObjectMapper出现“ System.ArgumentNullException”错误。

FamilyAppService类

     public class FamilyAppService : KmAppService, IFamilyAppService { 
        private readonly IAutho autho;

        public FamilyAppService( 
            IAutho autho) {
 
            this.autho = autho;
        } 

        public virtual async Task SendRequest(SendRequestInput input) {
             var family = ObjectMapper.Map<FamilyDto, Family>(input.Family);
             // code ...
             await autho.FindUserIdByEmail(family.Email); 
        }
    }

Autho类。我需要使用nSubstitute将IAutho依赖项替换为模拟类

public class Autho : IAutho, ITransientDependency { 

        public Autho( ) {
           
        } 

        public virtual async Task<User> FindUserIdByEmail(string input) { 
            // Don’t  want this code touched in test 
            // Code ...
        }
 
    }

我当前的测试...

  [Fact]
        public async Task ShouldSendEmail() {
  
            var autho = Substitute.For<IAutho>();
            autho.FindUserIdByEmail(Arg.Any<string>()).Returns((User)null);  
    
            var familyAppService = new FamilyAppService(autho);
            // var familyAppService = GetRequiredService<IFamilyAppService>();

            // setup input code here..
            // get ObjectMapper error here
            await familyAppService.SendRequest(input);
 
            // Assert  
        }

Answer 1

github abp仓库中的一位成员给了我正确答案。您需要在测试类上重写AfterAddApplication方法，并将替代/模拟添加到services.AddSingletone。

示例...

        protected override void AfterAddApplication(IServiceCollection services) {
 
            var autho = Substitute.For<IAutho>();
            autho.FindUserIdByEmail(Arg.Any<string>()).Returns((User)null);

            services.AddSingleton(autho);
        }

如何在abp框架中使用nSubstitute模拟依赖项，

1 个答案: