fix(fetch): make prototype properties writable (#10769)

1 files changed, 10 insertions, 0 deletions

diff --git a/cli/tests/unit/fetch_test.ts b/cli/tests/unit/fetch_test.ts
index e73953a5c..c2224083d 100644
--- a/cli/tests/unit/fetch_test.ts
+++ b/cli/tests/unit/fetch_test.ts
@@ -1139,3 +1139,13 @@ unitTest(
     assertEquals(actual, expected);
   },
 );
+
+unitTest({}, function fetchWritableRespProps(): void {
+  const original = new Response("https://deno.land", {
+    status: 404,
+    headers: { "x-deno": "foo" },
+  });
+  const new_ = new Response("https://deno.land", original);
+  assertEquals(original.status, new_.status);
+  assertEquals(new_.headers.get("x-deno"), "foo");
+});