单元测试MiddleWare，如何在.NET Core 3.1中向HttpContext添加HttpRequest

Oysio 发表于 Dev

奥西奥

我试图弄清楚如何测试一个.NET Core中间件。

public class MyMiddleware
    {
    public async Task Invoke(HttpContext context) {
    
      var requestProperties = GetPropertiesFromRequest(context.Request);
    } 
    
    public string GetPropertiesFromRequest(HttpRequest request) {
      //do stuff with request
    }
}

我已经设置了单元测试，需要在其中将HttpContext传递给中间件。我遇到的问题是，我似乎没有找到将HttpRequest添加到上下文的方法。

    [Fact]
    public async Task Middleware_should_get_properties_from_request()
    {
        var request = new HttpRequestMessage()
        {
            Method = HttpMethod.Get,
            RequestUri = new Uri("https://localhost:5001/"),
            Content = new StringContent({ 'message':'some content'}, Encoding.UTF8, "application/json"),
        };

    HttpContext context = new DefaultHttpContext();
    //context.Request = request;  //how to set the request on the context ?

     var myMiddleware = new MyMiddleware();
     await myMiddleware.Invoke(context);

     //Assert properties 
 }

HttpContext上的Request属性是只读的。还有另一种方法可以将httpRequest添加到上下文吗？

恩科西

只需在上下文的request属性上设置属性。该DefaultHttpContext默认创建一个

//...

var httpContext = new DefaultHttpContext();

var json = JsonConvert.SerializeObject("{ 'message':'some content'}");
var stream = new MemoryStream(Encoding.UTF8.GetBytes(json));
httpContext.Request.Body = stream;

httpContext.Request.ContentLength = stream.Length;
httpContext.Request.ContentType = "application/json";

 var myMiddleware = new MyMiddleware();

//Act
await myMiddleware.Invoke(httpContext);

//Assert
//...

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