c# - Owin 托管的 webapi 2.2。使用模拟服务测试 Controller

Question

我有 webapi，出于测试目的，我将其托管在 owin 中。我已经使用 autofac 进行了设置。现在，当我进行测试时，我想注入(inject)最小起订量依赖项。到目前为止我还做不到。我已经阅读了文档并做了一些研究，但我遗漏了一些东西。

这是测试代码。

 [Test]
    public void Request_all_airports()
    {
        const int port = 8086;
        AirportCollection moqAirportCollection = new AirportCollection();
        moqAirportCollection.Airports = new List<Airport>{new Airport{IATA = "moq",Name = "moqName"}};

        using (WebApp.Start<Startup>("http://localhost:" + port))
        {
            using (var mock = AutoMock.GetLoose())
            {
                var moqObj =  mock.Mock<IAirportService>().Setup(x => x.GetAirports()).Returns(moqAirportCollection);

                var client = new HttpClient {BaseAddress = new Uri("http://localhost:" + port)};
                var response = client.GetAsync("/api/airport/get").Result;
                var body = response.Content.ReadAsStringAsync().Result;
                var airportCollection = JsonConvert.DeserializeObject<AirportCollection>(body);
            }
        }
    }

请看。让我知道我错过了什么。如果您想查看 Controller 代码或任何其他代码，请告诉我。

这是启动代码

 public class Startup
{
    public static IContainer container { get; set; }

    public void Configuration(IAppBuilder appBuilder)
    {
        var httpConfig = new HttpConfiguration();
        container = AutofacSetup.Register(httpConfig);
        WebApiConfig.Register(httpConfig);


        appBuilder.UseAutofacMiddleware(container);
        appBuilder.UseAutofacWebApi(httpConfig);
        appBuilder.UseWebApi(httpConfig);
    }
}

谢谢

我是这么认为的，我已经在人们的帮助下解决了它。这是我的代码。

var moq = new Mock<IAirportService>();
                moq.Setup(x => x.GetAirports()).Returns(moqAirportCollection);
                newBuilder.RegisterInstance(moq.Object).As<IAirportService>();
                newBuilder.Update(Startup.container);

我还没有重建我刚刚更新的约束。 autofac 具有使用最新注册的行为，因此它将在此处使用模拟。

Answer 1

你快到了。

在您的测试中，您需要使用您的 autofac 容器注册您的模拟服务，以便通过应用程序中的模拟解决对 IAirportService 的依赖。

实现此目的的一种方法是为每个测试覆盖Startup 类的Configuration 方法，并将您的测试DI 放在那里。我在下面添加了一些评论以显示可以进行的更改:

public class Startup
{
    public static IContainer container { get; set; }

    // make this virtual
    public virtual void Configuration(IAppBuilder appBuilder)
    {
        var httpConfig = new HttpConfiguration();

        // have this return the ContainerBuilder instead of the container
        var builder = AutofacSetup.Register(httpConfig)
        container = builder.Build();

        WebApiConfig.Register(httpConfig);


        appBuilder.UseAutofacMiddleware(container);
        appBuilder.UseAutofacWebApi(httpConfig);
        appBuilder.UseWebApi(httpConfig);
    }
}

然后在您的测试类中，派生自 Startup 类并将您的测试逻辑放入其中。像这样:

public class MyTestCase {
        public static Mock<IAirportService> MockObj { get; set; }

        private class TestStartup : Startup {
            public override void Configuration(IAppBuilder app) {
                var httpConfig = new HttpConfiguration();

                // this now returns ContainerBuilder instead of the container
                var builder = AutofacSetup.Register(httpConfig)

                // register your mock, change this to whatever lifetime scope you need
                var moqAirportCollection = new AirportCollection();
                moqAirportCollection.Airports = new List<Airport>{new Airport{IATA = "moq",Name = "moqName"}};
                var mock = AutoMock.GetLoose()
                MockObj = mock.Mock<IAirportService>()
                                           .Setup(x => x.GetAirports())
                                           .Returns(moqAirportCollection);
                var moqObj = MockObj.Object;
                builder.RegisterInstance(moqObj).As<IAirportService>();



                container = builder.Build();

                WebApiConfig.Register(httpConfig);


                appBuilder.UseAutofacMiddleware(container);
                appBuilder.UseAutofacWebApi(httpConfig);
                appBuilder.UseWebApi(httpConfig);
            }
        }

        [Test]
        public void Request_all_airports()
        {    
           using (var server = WebApp.Start<Startup>())
           {
               var response = 
                   server.CreateRequest("/api/airport/get")
                         .GetAsync()
                         .Result;

                var body = response.Content.ReadAsStringAsync().Result;
                var result = JsonConvert.DeserializeObject<AirportCollection>(body);

                // assert something
            }
        }
    }