Improve debug_handler on tuple response types (#2201)

Co-authored-by: David Pedersen <[email protected]>
Co-authored-by: Jonas Platte <[email protected]>

axum/CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
-- None.
+- **fixed:** Improve `debug_handler` on tuple response types ([#2201])
+
+[#2201]: https://github.com/tokio-rs/axum/pull/2201
 
 # 0.7.3 (29. December, 2023)
 

axum/src/routing/tests/fallback.rs

@@ -31,6 +31,18 @@ async fn nest() {
     assert_eq!(res.text().await, "fallback");
 }
 
+#[crate::test]
+async fn two() {
+    let app = Router::new()
+        .route("/first", get(|| async {}))
+        .route("/second", get(|| async {}))
+        .fallback(get(|| async { "fallback" }));
+    let client = TestClient::new(app);
+    let res = client.get("/does-not-exist").await;
+    assert_eq!(res.status(), StatusCode::OK);
+    assert_eq!(res.text().await, "fallback");
+}
+
 #[crate::test]
 async fn or() {
     let one = Router::new().route("/one", get(|| async {}));