Owin test server how to add a header before executing middleware

Question

I am using OWIN middleware and I am trying to set a header that is getting set on a controller. For unit testing I am trying to set the header in the test to no avail. What is the best way to set this header?

[TestMethod]
public async Task HasHeader()
{
        using (var server = TestServer.Create(app =>
        {
            //need to set header before calling the below middleware header name is bobsyouruncle
            app.Use(typeof(HeaderMiddleware));

        }))

        using (var client = new HttpClient(server.Handler))
        {
            var response = await client.GetAsync("http://win.example.com/bob/");
            System.Diagnostics.Debugger.Break();
        }
}

score 0 · Answer 1 · answered Jun 05 '17 at 19:45

Create a test middleware that sets the header.

 [TestMethod]
 public async Task HasHeader()
  {
    using (var server = TestServer.Create(app =>
    {
        //need to set header before calling the below middleware header name is bobsyouruncle
        app.Use(typeof(TestMiddleware));
        app.Use(typeof(HeaderMiddleware));

    }))
    using (var client = new HttpClient(server.Handler))
    {
        var response = await client.GetAsync("http://win.example.com/bob/");
        System.Diagnostics.Debugger.Break();
    }
}

middleware

 public TestMiddleware(OwinMiddleware next)
        : base(next)
    {


    }

    public async override Task Invoke(IOwinContext context)
    {
        await Next.Invoke(context);
        context.Response.Headers.Add("bobsyouruncle", new string[] { "test1234" });


    }

I'm not sure how to pass that header value.

You can add additional parameters to the Middleware constructor and pass the arguments in when adding the Middleware to the chain e.g. `app.Use(typeof(HeaderMiddleware), "headerValue");` — humbleice, Mar 29 '18 at 17:07

Owin test server how to add a header before executing middleware

1 Answers1