From 7d2dfef5c2380eb543fd734e27863bbd1c648a75 Mon Sep 17 00:00:00 2001
From: Muki Kiboigo <muki@muki.gg>
Date: Mon, 28 Sep 2026 07:26:06 -0700
Subject: [PATCH] add test for sync XHR headers check

---
 src/browser/tests/net/xhr.html | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/browser/tests/net/xhr.html b/src/browser/tests/net/xhr.html
index edb4333e5..ab223e09c 100644
--- a/src/browser/tests/net/xhr.html
+++ b/src/browser/tests/net/xhr.html
@@ -819,3 +819,17 @@ handler runs, abort() cancels the re-send and no load is delivered.
     });
   }
 </script>
+
+<script id=xhr_sync_response_headers type=module>
+  {
+    // Sync XHR goes through HttpClient.submitSync; headers must still come
+    // back with copy_headers = true (which XHR always requests).
+    const req = new XMLHttpRequest();
+    req.open('GET', 'http://127.0.0.1:9582/xhr', false);
+    req.send();
+
+    testing.expectEqual(200, req.status);
+    testing.expectEqual('text/html; charset=utf-8', req.getResponseHeader('Content-Type'));
+    testing.expectEqual('content-length: 100\r\ncontent-type: text/html; charset=utf-8\r\n', req.getAllResponseHeaders());
+  }
+</script>