Question

我试图通过调用应返回错误消息（json响应）的端点来测试我的API。在Postman中测试时，API确实返回了正确的JSON，我能够看到状态代码不是200.但是，当尝试使用xunit和HttpClient进行测试时，我收到以下错误消息：

System.Net.Http.HttpRequestException : Error while copying content to a stream.

我想弄清楚为什么会这样。在我的API中，我正在检查凭据，如果它们不正确，我将抛出异常。此异常将被全局异常处理程序捕获，该异常处理程序将设置正确的状态代码并创建json响应。

异常处理程序：

public class ExceptionHandler : IExceptionFilter
{
    public void OnException(ExceptionContext context)
    {
        int status = (int)HttpStatusCode.InternalServerError;
        String message = context.Exception.Message;
        var exception = context.Exception;

        if (exception is ArgumentNullException) 
        {
            message = ((ArgumentNullException)exception).ParamName + " is required";
            status = (int)HttpStatusCode.BadRequest;
        }

        if (exception is NotFoundException)
        {
            message = exception.Message;
            status = (int)HttpStatusCode.NotFound;
        }

        if (exception is AuthenticationException)
        {
            message = exception.Message;
            status = (int)HttpStatusCode.Unauthorized;
        }

        if (exception is DuplicateEntryException)
        {
            message = exception.Message;
            status = 422; // Unprocessable entity, not supported in HttpStatusCode class
        }

        HttpResponse response = context.HttpContext.Response;
        response.StatusCode = status;
        response.ContentType = "application/json";

        response.WriteAsync(JsonConvert.SerializeObject(new ErrorMessage(message, (int)status)));
    }
}

class ErrorMessage
{
    public string Message { get; set; }
    public int Code { get; set; }

    public ErrorMessage(string message, int code)
    {
        Message = message;
        Code = code;
    }
}

集成测试：

    [Fact]
    public async Task ItReturnsAnErrorWhenCredentialsAreIncorrect()
    {
        var request = new UserAuthenticationRequest();
        request.Username = "JohnDoe";
        request.Password = "TestPasswordIncorrect";

        var stringPayload = JsonConvert.SerializeObject(request);

        var httpContent = new StringContent(stringPayload, Encoding.UTF8, "application/json");

        _client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        var response = await _client.PostAsync("api/authentication/GetUserAppToken", httpContent);


        Assert.Equal(401, (int)response.StatusCode);
    }

任何人都知道为什么会抛出HttpRequestException？

更新

客户端设置：

    public AuthenticationControllerTest()
    {
        _testServer = new TestServer(new WebHostBuilder().UseStartup<TestStartup>());
        _client = _testServer.CreateClient();
    }

我通过为每个测试方法设置一个新客户端来进行测试。不幸的是，这也没有解决问题

更新2：

我认为它必须对HttpClient设置或我发送的请求消息执行某些操作。我没有使用异常处理程序，而是决定立即从控制器返回BadRequest（）。

    public BadRequestResult Post([FromBody]UserAuthenticationRequest userAuthenticationRequest)
    {
        return BadRequest();
    }

执行此操作时，我再次收到HttpRequestException，而不是获取状态码为400的HttpResponse。

由于HttpRequestException，.NET Core Integration测试失败

0 个答案: