sql – 如何单元测试ServiceStack？

我喜欢SS,但我正在抓我的头试图单元测试我的业务层.我是新来的单元测试和模拟,并正在阅读在NSubstitute,因为这看起来像一个有趣的嘲笑层.

我的文件结构大致如下：

MainAppHostProject*
|
 -AppStart
    -AppHost  <-- standard apphost

DtoProject*
|
 -HelloWorldDto  <-- simple POCO to 


ServiceLayerProject*
|
 -HelloWorldService  <-- service interface that merely passes/sends Dtos to/from business layer


BusinessLayerProject*
|
 -HelloWorldManager <-- logic to construct response and this class extends 'Service' (letting me access Db,session,etc)...sidenote: maybe i shouldve called this a HelloWorldRepository?
 -CustomAuthProvider
 -CustomUserSession


DaoProject*
|
 -HelloWorldDao  <-- POCO of table structure

Apphost指向HelloWorldService程序集,并以标准注册SQL Server数据库.

一切真的很好,我已经能够以更清洁的方式建立逻辑.不幸的是,我希望进行单元测试,但我不知道如何解耦数据库.

我试图在内存数据库中注册一个假的,但是我认为在SQL Server vs SQLite方式中,我已经使用代码来获取身份等等有不兼容的问题.

// container.Register<IDbConnectionFactory>(c => new OrmLiteConnectionFactory(":memory:",false,SqliteOrmLiteDialectProvider.Instance));
// container.Register<IDbConnectionFactory>(c => new OrmLiteConnectionFactory(":memory:",SqlServerDialect.Provider));

我只想去耦和单元测试.有什么想法吗？

*** UPDATE

public class UnitTest1
{
    private Container container;

    [TestMethod]
    public void TestMethod1()
    {
        container = new Container();

        // container.Register<IDbConnectionFactory>(new OrmLiteConnectionFactory(":memory:",SqliteDialect.Provider));
        // sqlite didnt work so attempting with a real DB for now
        var connectionString = @"Data Source=.SQLEXPRESS;Initial Catalog=XXX;Integrated Security=True";
        container.Register<IDbConnectionFactory>(c => new OrmLiteConnectionFactory(connectionString,SqlServerDialect.Provider));

        // dependencies are injecting ok 
        container.RegisterAutoWiredAs<FeedbackRepo,IFeedbackRepo>();

        // service is autowiring --> leading to good injections
        container.RegisterAutoWired<FeedbackService>();

        var service = container.Resolve<FeedbackService>();
        service.SetResolver(new BasicResolver(container));

        // unit test is working well  
        var request = new DTO.FeedbackDto { Message = "test" };
        bool result = service.Post(request);
   }
}

目前在我派生的服务类中,让’Db’停止为null.

解决方法

我们将使用这个测试这个简单服务的simple unit test example来说明这两种方法：

的DTO

public class FindRockstars
{
   public int? Aged { get; set; }
   public bool? Alive { get; set; }
}

public class GetStatus
{
   public string LastName { get; set; }
}

public class RockstarStatus
{
   public int Age { get; set; }
   public bool Alive { get; set; }
}

public class Rockstar
{
   public int Id { get; set; }
   public string FirstName { get; set; }
   public string LastName { get; set; }
   public int? Age { get; set; }
}

履行

public class SimpleService : Service
{
   public IRockstarRepository RockstarRepository { get; set; }

   public List<Rockstar> Get(FindRockstars request)
   {
      return request.Aged.HasValue
          ? Db.Select<Rockstar>(q => q.Age == request.Aged.Value)
          : Db.Select<Rockstar>();
   }

   public RockstarStatus Get(GetStatus request)
   {
      var rockstar = RockstarRepository.GetByLastName(request.LastName);
      if (rockstar == null)
          throw HttpError.NotFound("'{0}' is not a Rockstar".Fmt(request.LastName));

      var status = new RockstarStatus
      {
          Alive = RockstarRepository.IsAlive(request.LastName)
      }.PopulateWith(rockstar); //Populates with matching fields

      return status;
   }
}

此服务提供2个操作,FindRockstars使得数据库查询直接在服务类本身中,GetStatus使用存储库而不是所有的数据访问.

使用内存数据库

如果您在服务实现中直接访问Db,那么您将要使用一个真正的数据库,因为ADO.NET IDbConnection需要大量的嘲弄.您可以通过使用内置的IOC以相同的方式在ServiceStack本身注册您的依赖关系.对于单元测试,只要在TestFixtureSetup中使用新的Container,我们就可以在没有AppHost的情况下执行此操作,例如：

测试设置

private ServiceStackHost appHost;

[TestFixtureSetUp]
public void TestFixtureSetUp()
{
    appHost = new BasicAppHost().Init();
    var container = appHost.Container;

    container.Register<IDbConnectionFactory>(
        new OrmLiteConnectionFactory(":memory:",SqliteDialect.Provider));

    container.RegisterAutoWiredAs<RockstarRepository,IRockstarRepository>();

    container.RegisterAutoWired<SimpleService>();

    using (var db = container.Resolve<IDbConnectionFactory>().Open())
    {
        db.DropAndCreateTable<Rockstar>();
        db.InsertAll(SeedData);
    }
}

[TestFixtureTearDown]
public void TestFixtureTearDown()
{
    appHost.Dispose();
}

随着所有设置,我们现在可以独立于ServiceStack本身,隔离测试服务就像一个普通的C#类：

[Test]
public void Using_in_memory_database()
{
    //Resolve the autowired service from IOC and set Resolver for the base class
    var service = appHost.Container.Resolve<SimpleService>(); 

    var rockstars = service.Get(new FindRockstars { Aged = 27 });

    rockstars.PrintDump(); //Print a dump of the results to Console

    Assert.That(rockstars.Count,Is.EqualTo(SeedData.Count(x => x.Age == 27)));

    var status = service.Get(new GetStatus { LastName = "Vedder" });
    Assert.That(status.Age,Is.EqualTo(48));
    Assert.That(status.Alive,Is.True);

    status = service.Get(new GetStatus { LastName = "Hendrix" });
    Assert.That(status.Age,Is.EqualTo(27));
    Assert.That(status.Alive,Is.False);

    Assert.Throws<HttpError>(() =>
        service.Get(new GetStatus { LastName = "Unknown" }));
}

手动注入依赖关系

如果您希望单元测试不使用内存数据库,您可以选择模拟您的依赖项.在这个例子中,我们将使用一个独立的Mock,但是可以使用像Moq这样的嘲笑库来减少样板.

public class RockstarRepositoryMock : IRockstarRepository
{
    public Rockstar GetByLastName(string lastName)
    {
        return lastName == "Vedder"
            ? new Rockstar(6,"Eddie","Vedder",48)
            : null;
    }

    public bool IsAlive(string lastName)
    {
        return lastName == "Grohl" || lastName == "Vedder";
    }
}

[Test]
public void Using_manual_dependency_injection()
{
    var service = new SimpleService
    {
        RockstarRepository = new RockstarRepositoryMock()
    };

    var status = service.Get(new GetStatus { LastName = "Vedder" });
    Assert.That(status.Age,Is.True);

    Assert.Throws<HttpError>(() =>
        service.Get(new GetStatus { LastName = "Hendrix" }));
}

当我们手动注入所有依赖项时,此示例不需要容器.我也把这个例子添加到了Testing wiki文档中.

（编辑：安卓应用网）

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