Test setting response.body by fetching on a server

tests/unit/net/fetch.rs

@@ -6,7 +6,7 @@ use hyper::server::{Listening, Server};
 use hyper::server::{Request as HyperRequest, Response as HyperResponse};
 use net::fetch::methods::fetch;
 use net_traits::request::{Context, Referer, Request};
-use net_traits::response::Response;
+use net_traits::response::{Response, ResponseBody};
 use std::rc::Rc;
 use url::Url;
 
@@ -42,3 +42,24 @@ fn test_fetch_response_is_not_network_error() {
         panic!("fetch response shouldn't be a network error");
     }
 }
+
+#[test]
+fn test_fetch_response_body_matches_const_message() {
+
+    static MESSAGE: &'static [u8] = b"Hello World!";
+    let (mut server, url) = make_server(MESSAGE);
+
+    let mut request = Request::new(url, Context::Fetch, false);
+    request.referer = Referer::NoReferer;
+    let wrapped_request = Rc::new(request);
+
+    let fetch_response = fetch(wrapped_request, false);
+    let _ = server.close();
+
+    match fetch_response.body {
+        ResponseBody::Done(body) => {
+            assert_eq!(body, MESSAGE);
+        },
+        _ => { panic!() }
+    };
+}