如何在 AspNetCore.Authentication.Abstractions 上模拟 AuthenticateAsync

Question

我在一个控制器上有一个动作，它调用了

var result = await HttpContext.AuthenticateAsync(IdentityServerConstants.ExternalCookieAuthenticationScheme);

我试图在这样的单元测试中模拟这个结果

httpContextMock.AuthenticateAsync(Arg.Any<string>()).Returns(AuthenticateResult.Success(...

但是，这会引发InvalidOperationException

“没有注册类型‘Microsoft.AspNetCore.Authentication.IAuthenticationService’的服务”

模拟这个方法的正确方法是什么？

Answer 1

那个extension method

/// <summary>
/// Extension method for authenticate.
/// </summary>
/// <param name="context">The <see cref="HttpContext"/> context.</param>
/// <param name="scheme">The name of the authentication scheme.</param>
/// <returns>The <see cref="AuthenticateResult"/>.</returns>
public static Task<AuthenticateResult> AuthenticateAsync(this HttpContext context, string scheme) =>
    context.RequestServices.GetRequiredService<IAuthenticationService>().AuthenticateAsync(context, scheme);

通过IServiceProvider RequestServices 属性。

/// <summary>
/// Gets or sets the <see cref="IServiceProvider"/> that provides access to the request's service container.
/// </summary>
public abstract IServiceProvider RequestServices { get; set; }

模拟服务提供商以返回模拟的IAuthenticationService，您应该能够通过测试伪造自己的方式。

authServiceMock.AuthenticateAsync(Arg.Any<HttpContext>(), Arg.Any<string>())
    .Returns(Task.FromResult(AuthenticateResult.Success()));
providerMock.GetService(typeof(IAuthenticationService))
    .Returns(authServiceMock);
httpContextMock.RequestServices.Returns(providerMock);

//...