fix: retry module download once if server errored (#17252)

Closes https://github.com/denoland/deno/issues/17251
Closes #19970

This commits adds logic to retry failed module downloads once.
Both request and server errors are handled and the retry is done after
50 ms wait time.

1 files changed, 5 insertions, 0 deletions

diff --git a/test_util/src/lib.rs b/test_util/src/lib.rs
index dcf12d860..9b84db7f3 100644
--- a/test_util/src/lib.rs
+++ b/test_util/src/lib.rs
@@ -808,6 +808,11 @@ async fn main_server(
       *res.status_mut() = StatusCode::FOUND;
       Ok(res)
     }
+    (_, "/server_error") => {
+      let mut res = Response::new(Body::empty());
+      *res.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+      Ok(res)
+    }
     (_, "/x_deno_warning.js") => {
       let mut res = Response::new(Body::empty());
       *res.status_mut() = StatusCode::MOVED_PERMANENTLY;