c# - 在 C# 单元测试中使用 HttpContext.GetTokenAsync

Question

我正在尝试为我的 Controller 类编写单元测试，该类使用以下命令检索 token :

string token = await HttpContext.GetTokenAsync("access_token");

因此我用以下代码模拟了 HttpContext:

public static HttpContext MakeFakeContext()
{
    var serviceProvider = new Mock<IServiceProvider>();
    var authservice = new Mock<IAuthenticationService>();

    authservice.Setup(_ => _.GetTokenAsync(It.IsAny<HttpContext>(), It.IsAny<string>())).Returns(Task.FromResult("token"));
    serviceProvider.Setup(_ => _.GetService(typeof(IAuthenticationService))).Returns(authservice);

    return new DefaultHttpContext
    {
        RequestServices = serviceProvider.Object
    };
}

我正在设置模拟上下文:

var mockcontext = MakeFakeContext();

unitUnderTest.ControllerContext = new ControllerContext
{
    HttpContext = mockcontext
};

现在，当我运行单元测试时，出现以下错误:

System.NotSupportedException : Unsupported expression: _ => _.GetTokenAsync(It.IsAny(), It.IsAny()) Extension methods (here: AuthenticationTokenExtensions.GetTokenAsync) may not be used in setup / verification expressions.

在我的研究过程中，我偶然发现了一些解决方案，您可以在这些解决方案中模拟幕后涉及的不属于扩展的特定部分。其中一些:Moq IServiceProvider / IServiceScope , How to unit test HttpContext.SignInAsync()? 。第二个显示了类似的问题，在我尝试后似乎有效。但由于某种原因，它不适用于 GetTokenAsync 方法。

你们有什么提示吗？

Answer 1

这里以 Zer0 的答案为基础，是一个使用 Moq 的示例:

    private void MockHttpContextGetToken(
        Mock<IHttpContextAccessor> httpContextAccessorMock,
        string tokenName, string tokenValue, string scheme = null)
    {
        var authenticationServiceMock = new Mock<IAuthenticationService>();
        httpContextAccessorMock
            .Setup(x => x.HttpContext.RequestServices.GetService(typeof(IAuthenticationService)))
            .Returns(authenticationServiceMock.Object);

        var authResult = AuthenticateResult.Success(
            new AuthenticationTicket(new ClaimsPrincipal(), scheme));

        authResult.Properties.StoreTokens(new[]
        {
            new AuthenticationToken { Name = tokenName, Value = tokenValue }
        });

        authenticationServiceMock
            .Setup(x => x.AuthenticateAsync(httpContextAccessorMock.Object.HttpContext, scheme))
            .ReturnsAsync(authResult);
    }