如何根据URL

如何解决如何根据URL

对于Devs， 我将模拟HttpMessageHandler来测试HttpClient，我的问题是如何基于 URL和Http方法？因此，响应将是方法和URL的函数：

Get + "http://testdoc.com/run?test=true&t2=10   => return X
Get + "http://testdoc.com/walk?test=true&t2=10   => return Y
Post + "http://testdoc.com/walk   => return Z

所有3个通话都会返回不同的内容。

我当前的单元测试涵盖了所有内容：

var mockMessageHandler = new Mock<HttpMessageHandler>();
mockMessageHandler.Protected()
    .Setup<Task<HttpResponseMessage>>("SendAsync",ItExpr.IsAny<HttpRequestMessage>(),ItExpr.IsAny<CancellationToken>())
    .ReturnsAsync(new HttpResponseMessage
    {  ... });

谢谢

解决方法

问题是您要告诉moq设置使用任何带有ItExpr.IsAny<HttpRequestMessage>()的http请求消息，因此对于HttpRequestMessage的任何实例，它将始终返回相同的结果。

如果您获得X个不同的结果，则需要创建X个不同的实例：

string firstUri = "http://testdoc.com/run?test=true&t2=10";
HttpRequestMessage httpRequestMessage_1 = new HttpRequestMessage
{
    RequestUri = new Uri(firstUri),Method = ...,Content = ...,};

ItExpr.IsAny<HttpRequestMessage>()的实例不是httpRequestMessage_1，而是：

.Setup<Task<HttpResponseMessage>>("SendAsync",httpRequestMessage_1,ItExpr.IsAny<CancellationToken>())
.ReturnsAsync(new HttpResponseMessage
{  /* Something with X */ });

,

根据你的代码，我想出了下面的代码
模拟通过其 URL 识别的两个不同调用。

var mockMessageHandler = new Mock<HttpMessageHandler>();

var content = new HttpContentMock(usersQueryResult);
content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");

mockMessageHandler.Protected()
  .Setup<Task<HttpResponseMessage>>(
    "SendAsync",ItExpr.Is<HttpRequestMessage>(rm => 
      rm.RequestUri.AbsoluteUri.StartsWith("https://example.com/api/users?query=")),ItExpr.IsAny<CancellationToken>())
    .ReturnsAsync(
      new HttpResponseMessage
      {
        StatusCode = 200,Content = content
      };
    );

mockMessageHandler.Protected()
  .Setup<Task<HttpResponseMessage>>(
    "SendAsync",ItExpr.Is<HttpRequestMessage>(rm => 
      rm.RequestUri.AbsoluteUri.StartsWith("https://example.com/api/users/gurka/")),ItExpr.IsAny<CancellationToken>())
  .ReturnsAsync(
    new HttpResponseMessage
    {
      StatusCode = 201,Content = null,// In reality the user found but we don't care for this test.
    }
  );
}

private class HttpContentMock : HttpContent
{
  private readonly IList<AdUserDataContract> users;
  public HttpContentMock(IList<AdUserDataContract> users)
  {
    this.users = users;  }

  protected override Task SerializeToStreamAsync(Stream stream,TransportContext context)
  {
    var json = JsonSerializer.Serialize(users,typeof(AdUsersDataContract));
    var buffer = Encoding.ASCII.GetBytes(json);
    stream.Write(buffer,buffer.Length);
    return Task.CompletedTask;
  }

  protected override bool TryComputeLength(out long length)
  {
    length = 1; // Well... not totally true is it?
    return true;
  }
}