无法模拟 unitOfWork 并且没有服务接口

Question

我有以下课程

namespace Foo.Bar.Services    
{    
    public abstract class Service    
    {    
        public Service(IUnitOfWork unitOfWork)    
        {    
            this.UnitOfWork = unitOfWork;    
        }
        protected IUnitOfWork UnitOfWork { get; private set; }    
    }  
}

using...

namespace Foo.Bar.Services    
{    
    public class ControlService : Service    
    {    
        ...    
        private readonly IRepository<GroupStructure> groupStructures = null;

        public ControlService(IUnitOfWork uow) : base(uow)
        {    
           ...
           this.agencyGroupStructures = this.UnitOfWork.GetRepository<AgencyGroupStructure>();    
        }

        public Tuple<bool, int> HasExternalImage(int branchId)
        {
            var externalResultList = from a in this.Structures.Table
                                    where a.GroupID == branch.GroupID
                                        && (a.AreExternalRequired == true)
                                        && (a.ProductTypeID == ETourType.Trailer)
                                        && !a.Deleted
                                    select a;
            return (some logic based on above...)
        }    
}

测试

namespace ControlTests    
{    
    [TestFixture]    
    public class Control    
    {    
        //unable to create service due to being abstact  
        [Test]    
        public void TestMethod1()    
        {    
            ******Changed here******
            var Mock = new Mock<GroupStructureService> { CallBase = true };    
            var fakeControl = new ControlService(Mock.Object)

            var sut = fakeControl.HasExternalImage(1249);

            Assert.That(sut.Item1, "true");    
        }    
    }    
}

使用 NUnit 和 Moq 运行上述命令会显示以下消息：

Castle.DynamicProxy.InvalidProxyConstructorArgumentsException : 可以 不实例化类的代理：Foo.Bar.Services.ControlService.
找不到无参数构造函数。

我已经尝试了一些方法，但我无法让这个以前未经测试的应用程序创建一个模拟对象来测试

编辑，谢谢。所以我把它改成使用 ControlService 和 mock 1 依赖。但它的错误是它不能从 ....GroupStructure 到 Foo.Bar.IUnitOfWork

Answer 1

通常情况下，被测系统不会被模拟。模拟其依赖项并将其注入到被测类的实例中

[TestFixture]    
public class Control { 

    [Test]    
    public void TestMethod1() {
        //Arrange
        var repository = new Mock<IRepository<GroupStructure>>();
        //...Set up the repository behavior to satisfy logic

        var uow = new Mock<IUnitOfWork>();
        uow.Setup(_ => _.GetRepository<AgencyGroupStructure>())
            .Returns(repository.Object);

        var sut = new ControlService(uow.Object);
        var expected = true;

        //Act
        var actual = sut.HasExternalImage(1249);

        //Assert
        Assert.AreEqual(actual.Item1, expected);    
    }    
}

参考Moq Quickstart 以更好地了解如何使用模拟框架。