c# - IHeadersDictionary 在模拟后返回 null

Question

我正在尝试模拟 IHeadersDictionary，每当我尝试访问它时，我都会返回 Null。

public interface IRequestScopeContext
{
    IHeaderDictionary Headers { get; set; }
    ISessionInfo SessionInfo { get; set; }
    HttpContext HttpContextInfo { get; set; }
}

[SetUp]
public void Setup()
{
    var headers = new Dictionary<string, string>
    {
        { "Key", "Value"}
    } as IHeaderDictionary;

    var sessionInfo = new SessionInfo
    {
        AccountId = "AccountId",
        UserId = "UserId",
    };

    requestScopeContext = new Mock<IRequestScopeContext>();
    requestScopeContext.Setup(x => x.Headers).Returns(headers);
    requestScopeContext.Setup(x => x.SessionInfo).Returns(sessionInfo);

    serviceProvider = new Mock<IServiceProvider>();
    serviceProvider.Setup(sp => sp.GetService(It.Is<Type>((Type t) => t.Name.Equals("IRequestScopeContext")))).Returns(requestScopeContext.Object);

    httpContextAccessor = new Mock<IHttpContextAccessor>();
    httpContextAccessor.Setup(x => x.HttpContext.RequestServices).Returns(serviceProvider.Object);
}

我也试过用

requestScopeContext.Setup(x => x.Headers.Add( "Key", "Value"));

但每当我访问 requestScopeContext.Headers 时，它都会返回 null。

我应该如何模拟这本字典？

我的测试方法是这样的

[Test]
public void SessionHelper_InvokeConstructor_Should_ReturnValidObject()
{
    var sessionHelper = new SessionHelper(httpContextAccessor.Object);

    Assert.IsNotNull(sessionHelper);
}

这是我正在测试的代码。

public SessionHelper(IHttpContextAccessor httpContextAccessor)
{
    IRequestScopeContext requestScopeContext = (IRequestScopeContext)httpContextAccessor.HttpContext.RequestServices.GetService(typeof(IRequestScopeContext));

    currentAccountId = requestScopeContext.SessionInfo?.AccountId;
    currentUserId = requestScopeContext.SessionInfo?.UserId;
    requestId = requestScopeContext.Headers?["key"];
}

Answer 1

正如@Iurii Maksimov 提到的，您的转换不正确 - Dictionary<string, string> 之间没有直接转换和 IHeaderDictionary ，改用这个:

var headers = new HeaderDictionary(new Dictionary<String, StringValues>
{
    { "Key", "Value"}
}) as IHeaderDictionary;