Disable prometheus in test specs.

See Ptrskay3/axum-prometheus#59
See Ptrskay3/axum-prometheus#65

The actual error I was seeing is:

thread '<unnamed>' panicked at /Users/muji/.cargo/registry/src/index.crates.io-6f17d22bba15001f/axum-prometheus-0.7.0/src/lib.rs:850:14:
Failed to build metrics recorder: FailedToCreateHTTPListener("Address already in use (os error 48)")

crates/integration_tests/Cargo.toml

@@ -28,7 +28,7 @@ secrecy.workspace = true
 http.workspace = true
 
 sos-ipc = { path = "../ipc", features = ["tcp"] }
-sos-server = { path = "../server" }
+sos-server = { path = "../server", default-features = false, features = ["listen", "audit", "pairing"] }
 sos-test-utils = { path = "../test_utils" }
 
 copy_dir = "0.1"

crates/server/Cargo.toml

@@ -12,7 +12,7 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [features]
-default = ["listen", "audit", "pairing", "acme", "prometheus"]
+default = ["listen", "audit", "pairing", "acme"]
 prometheus = ["axum-prometheus"]
 acme = ["dep:tokio-rustls-acme"]
 listen = ["sos-protocol/listen"]

crates/server/src/server.rs

@@ -355,18 +355,19 @@ impl Server {
             v1 = v1.layer(Extension(file_operations));
         }
 
-        #[cfg(feature = "prometheus")]
-        let (prometheus_layer, metric_handle) =
-            axum_prometheus::PrometheusMetricLayerBuilder::new()
-                .with_default_metrics()
-                .enable_response_body_size(true)
-                .build_pair();
-
-        let mut app = Router::new();
-        app = app.route("/", get(home));
+        #[allow(unused_mut)]
+        let mut app = Router::new()
+            .route("/", get(home))
+            .nest_service("/api/v1", v1);
 
         #[cfg(feature = "prometheus")]
         {
+            let (prometheus_layer, metric_handle) =
+                axum_prometheus::PrometheusMetricLayerBuilder::new()
+                    .with_default_metrics()
+                    .enable_response_body_size(true)
+                    .build_pair();
+
             app = app
                 .route(
                     "/metrics",
@@ -375,7 +376,6 @@ impl Server {
                 .layer(prometheus_layer);
         }
 
-        app = app.nest_service("/api/v1", v1);
         Ok(app)
     }
 }