如何在ASP.net核心单元测试项目中模拟Session变量? [英] How to Mock Session variables in ASP.net core unit testing project?

问题描述

如何在ASP.net核心单元测试项目中模拟会话变量?

1)我创建了一个会话的模拟对象.

模拟嘲笑HttpContext = new Mock();模拟嘲笑HttpContext = new Mock();模拟嘲笑Session = new Mock().As();

Mock mockHttpContext = new Mock(); Mock mockHttpContext = new Mock();Mock mockSession = new Mock().As();

2)设置GetString()方法

mockSession.Setup(s => s.GetString("ModuleId")).Returns("1");

mockSession.Setup(s => s.GetString("ModuleId")).Returns("1");

3)创建controllerContext并分配了模拟httpContext对象

controller.ControllerContext.HttpContext =模拟HttpContext.Object;

controller.ControllerContext.HttpContext = mockHttpContext.Object;

4)尝试从控制器读取.

HttpContext.Session.GetString("ModuleId")

HttpContext.Session.GetString("ModuleId")

而我得到的是"ModuleId"的空值.请帮助我模拟会话GetString()方法

Whereas I get a null value of "ModuleId". Please help me to mock session GetString() method

示例:

        //Arrange
        //Note: Mock session 
        Mock<HttpContext> mockHttpContext = new Mock<HttpContext>();
        Mock<ITestSession> mockSession = new Mock<ISession>().As<ITestSession>();
        //Cast list to IEnumerable
        IEnumerable<string> sessionKeys = new string[] { };
        //Convert to list.
        List<string> listSessionKeys = sessionKeys.ToList();
        listSessionKeys.Add("ModuleId");
        sessionKeys = listSessionKeys;
        mockSession.Setup(s => s.Keys).Returns(sessionKeys);
        mockSession.Setup(s => s.Id).Returns("89eca97a-872a-4ba2-06fe-ba715c3f32be");
        mockSession.Setup(s => s.IsAvailable).Returns(true);
        mockHttpContext.Setup(s => s.Session).Returns(mockSession.Object);
     mockSession.Setup(s => s.GetString("ModuleId")).Returns("1");         

        //Mock TempData
        var tempDataMock = new Mock<ITempDataDictionary>();
        //tempDataMock.Setup(s => s.Peek("ModuleId")).Returns("1");

        //Mock service
        Mock<ITempServices> mockITempServices= new Mock<ITempServices>();
        mockITempServices.Setup(m => m.PostWebApiData(url)).Returns(Task.FromResult(response));

        //Mock Management class method
        Mock<ITestManagement> mockITestManagement = new Mock<ITestManagement>();
        mockITestManagement .Setup(s => s.SetFollowUnfollow(url)).Returns(Task.FromResult(response));

        //Call Controller method
        TestController controller = new TestController (mockITestManagement .Object, appSettings);
        controller.ControllerContext.HttpContext = mockHttpContext.Object;            
        controller.TempData = tempDataMock.Object;

        //Act
        string response = await controller.Follow("true");

        // Assert
        Assert.NotNull(response);
        Assert.IsType<string>(response);

推荐答案

首先创建一个名为mockHttpSession的类，并从ISession继承.

First create class Named mockHttpSession and inherit from ISession.

public class MockHttpSession : ISession
{
    Dictionary<string, object> sessionStorage = new Dictionary<string, object>();

    public object this[string name]
    {
        get { return sessionStorage[name]; }
        set { sessionStorage[name] = value; }
    }

    string ISession.Id
    {
        get
        {
            throw new NotImplementedException();
        }
    }

    bool ISession.IsAvailable
    {
        get
        {
            throw new NotImplementedException();
        }
    }

    IEnumerable<string> ISession.Keys
    {
        get { return sessionStorage.Keys; }
    }

    void ISession.Clear()
    {
        sessionStorage.Clear();
    }

    Task ISession.CommitAsync()
    {
        throw new NotImplementedException();
    }

    Task ISession.LoadAsync()
    {
        throw new NotImplementedException();
    }

    void ISession.Remove(string key)
    {
        sessionStorage.Remove(key);
    }

    void ISession.Set(string key, byte[] value)
    {
        sessionStorage[key] = value;
    }

    bool ISession.TryGetValue(string key, out byte[] value)
    {
        if (sessionStorage[key] != null)
        {
            value = Encoding.ASCII.GetBytes(sessionStorage[key].ToString());
            return true;
        }
        else
        {
            value = null;
            return false;
        }
    }        
}

然后在实际控制器中使用此会话:

Then use this session in actual controller:

     Mock<HttpContext> mockHttpContext = new Mock<HttpContext>();
        MockHttpSession mockSession = new MockHttpSession();           
        mockSession["Key"] = Value;
        mockHttpContext.Setup(s => s.Session).Returns(mockSession);
        Controller controller=new Controller();
        controller.ControllerContext.HttpContext = mockHttpContext.Object;

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