控制器中的模拟服务器

时间:2013-06-26 23:39:33

标签: asp.net-mvc mocking

我的控制器中有以下行:

string lTempPath = Path.Combine(Server.MapPath("~/Temp"), lRandomFileName);

问题是服务器不是虚拟的,只能使用getter访问。

我得到了

  

“方法或操作未实施。”

如何模拟此服务器?

我创建的测试如下:

    [TestCase]
    public void PreviewActionShouldGenerateUrlOfPdf()
    {
        //Arrange
        var server = MockRepository.GenerateMock<HttpServerUtilityBase>();
        server.Stub(s => s.MapPath("~Temp")).Return("~/Temp");
        var httpContext = MockRepository.GenerateMock<HttpContextBase>();
        httpContext.Stub(hc => hc.Server).Return(server);
        httpContext.Server.Stub(s => s.MapPath("~/Temp")).Return("~/Temp");

        var controller = new StudiesController()
        {
            ReportingService = MockRepository.GenerateMock<IReportingService>(),
            SecurityService = MockRepository.GenerateMock<ISecurityService>()
        };


        controller.ControllerContext = new ControllerContext(httpContext, new RouteData(), controller);

        controller.ReportingService.Stub(rs => rs.GetStudyByGID(new Guid())).Return(new Study());
        controller.ReportingService.Stub(rs => rs.ListPractices()).Return(new[] { new Practice(), new Practice() });
        controller.SecurityService.Stub(ss => ss.GetUser("")).IgnoreArguments().Return(new User());

        controller.ControllerContext.HttpContext = MockRepository.GeneratePartialMock<FakeHttpContext>("http://test.com");
        controller.HttpContext.User = new FakePrincipal(new FakeIdentity("test"), new string[0]);
        controller.ControllerContext.HttpContext.Stub(x => x.Request).Return(MockRepository.GenerateMock<HttpRequestBase>());
        controller.ControllerContext.HttpContext.Request.Stub(x => x.Url).Return(new Uri("http://test.com"));



        controller.ReportingService.Stub(
            rs =>
            rs.GenerateReport(new Study(), new Practice(), new User(), false, ReportGenerationOutputFormat.PDF)).IgnoreArguments().Return(new StudyReportSnapshot());

        var content = new ContentResult();

        //Act

        var result = (ContentResult)controller.Preview(new Guid());

        //Assert
        Assert.AreEqual(result.Content, content.Content);

    }

2 个答案:

答案 0 :(得分:13)

您可以在单元测试代码中使用Mocking框架,例如Rhino.Mocks,Moq或FakeItEasy

示例单元测试主体将是(此示例使用Moq)

var homeController = new HomeController();

//create mock of HttpServerUtilityBase
var server = new Mock<HttpServerUtilityBase>();

//set up mock to return known value on call.
server.Setup(x => x.MapPath("~/Temp")).Returns("c:\\temp\\");

var httpContext = new Mock<HttpContextBase>();

httpContext.Setup(x => x.Server).Returns(server.Object);

homeController.ControllerContext = new ControllerContext(httpContext.Object, new RouteData(), homeController);

YourModelName yourModelName = new YourModelName();
yourModelName.lRandomFileName = "zzzz.so";

var result = homeController.YourActionName(yourModelName);

然后你可以断言结果。

希望能给你一些想法

答案 1 :(得分:8)

假设您正在使用某种IOC / DI容器,则不应依赖Controller.Server。相反,您应该使用HttpServerUtilityBase

此示例假定Ninject为IOC容器,但任何常用容器都将执行:

首先,将HttpServerUtilityBase注册到您的IOC容器中,如下所示:

kernel.Bind<HttpServerUtilityBase>().ToMethod(c => new HttpServerUtilityWrapper(HttpContext.Current.Server));

这将确保您的应用在运行时将使用当前请求的服务器属性。

然后,向您的控制器添加一个构造函数,该构造函数接受HttpServerUtilityBase

的实例
public MyController(HttpServerUtilityBase server)
{
    this._server = server;
}

现在,在您拨打Server.MapPath之前的任何地方,只需拨打_server.MapPath即可。

最后,在你的测试中,你可以像这样模拟HttpServerUtilityBase(假设Moq是模拟框架):

var server = new Mock<HttpServerUtilityBase>();
server.Setup(s => s.MapPath(It.IsAny<string>())).Returns<string>(s => /* set up how you want MapPath to behave here */);

修改

既然你提到你没有使用DI框架,你可以诉诸“穷人的依赖注入”。基本上添加一个重载的构造函数:

public MyController()
    : this(new HttpServerUtilityWrapper(HttpContext.Current.Server))
{
}

public MyController(HttpServerUtilityBase server)
{
    this._server = server;
}

这将允许生产代码使用当前的Web请求,但您可以创建自己的HttpServerUtilityBase实现来用于测试。