Add failing test for nested cookies

Author: yoshuawuyts

tests/cookies.rs

@@ -113,3 +113,28 @@ fn successfully_set_multiple_cookies() {
 
     assert!(iter.next().is_none());
 }
+
+#[test]
+fn nested_cookies() {
+    let mut inner = tide::new();
+    inner.at("/2").get(|_req| async move {
+        let mut r = Response::new(200);
+        r.set_cookie(Cookie::new("snack", "tuna"));
+        r.body_string(String::from("ok"))
+    });
+
+    let mut outer = tide::new();
+    outer.at("/1").nest(inner);
+
+    let mut server = make_server(outer.into_http_service()).unwrap();
+
+    let req = http::Request::get("/1/2")
+        .body(Body::empty())
+        .unwrap();
+
+    let res = server.simulate(req).unwrap();
+
+    let mut cookies = res.headers().get_all(http::header::SET_COOKIE).iter();
+    assert_eq!(cookies.next().unwrap(), "snack=tuna");
+    assert!(cookies.next().is_none());
+}