finished initial networking impl

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

crates/lib/tests/networking_gossip_test.rs

@@ -0,0 +1,39 @@
+//! Integration test for gossip bridge
+//!
+//! Tests the gossip bridge channel infrastructure. Full iroh-gossip integration
+//! will be tested in Phase 3.5.
+
+use lib::networking::*;
+
+#[test]
+fn test_gossip_bridge_creation() {
+    let node_id = uuid::Uuid::new_v4();
+    let bridge = init_gossip_bridge(node_id);
+
+    assert_eq!(bridge.node_id(), node_id);
+}
+
+#[test]
+fn test_gossip_bridge_send() {
+    let node_id = uuid::Uuid::new_v4();
+    let bridge = init_gossip_bridge(node_id);
+
+    let message = SyncMessage::JoinRequest {
+        node_id,
+        session_secret: None,
+    };
+    let versioned = VersionedMessage::new(message);
+
+    // Should not error when sending
+    let result = bridge.send(versioned);
+    assert!(result.is_ok());
+}
+
+#[test]
+fn test_gossip_bridge_try_recv_empty() {
+    let node_id = uuid::Uuid::new_v4();
+    let bridge = init_gossip_bridge(node_id);
+
+    // Should return None when no messages available
+    assert!(bridge.try_recv().is_none());
+}