Stack Overflow now, haha

.idea/runConfigurations/Use.xml

@@ -0,0 +1,6 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Use" type="DartTestRunConfigurationType" factoryName="Dart Test" folderName="Router Tests" singleton="true">
+    <option name="filePath" value="$PROJECT_DIR$/test/router/use.dart" />
+    <method />
+  </configuration>
+</component>

lib/src/route.dart

@@ -217,6 +217,7 @@ class Route {
 
     final route = new Route('$path1/$path2',
         children: child.children,
+        debug: parent.debug || child.debug,
         handlers: child.handlers,
         method: child.method,
         name: child.name);
@@ -241,7 +242,7 @@ class Route {
   /// Adds the given route as a hierarchical child of this one.
   Route addChild(Route route, {bool join: true}) {
     Route created = join ? new Route.join(this, route) : route.._parent = this;
-    return created;
+    return created..debug = debug;
   }
 
   /// Assigns a name to this route.

lib/src/router.dart

@@ -17,7 +17,7 @@ class Router extends Extensible {
 
   /// Provide a `root` to make this Router revolve around a pre-defined route.
   /// Not recommended.
-  Router([Route root]) : this.root = root ?? new Route('/', name: '<root>');
+  Router([Route root]) : this.root = root ?? new _RootRoute();
 
   void _printDebug(msg) {
     if (debug)
@@ -89,7 +89,7 @@ class Router extends Extensible {
         }
       }
 
-      return result;
+      return result..debug = debug;
     }
   }
 
@@ -102,7 +102,10 @@ class Router extends Extensible {
 
     void dumpRoute(Route route, {String replace: null}) {
       for (var i = 0; i < tabs; i++) buf.write(tab);
-      buf.write('- ${route.method} ');
+
+      if (route == root)
+        buf.write('(root) ${route.method} ');
+      else buf.write('- ${route.method} ');
 
       final p =
           replace != null ? route.path.replaceAll(replace, '') : route.path;
@@ -188,7 +191,7 @@ class Router extends Extensible {
           copiedMiddleware[middlewareName];
     }
 
-    root.addChild(router.root);
+    root.child(path).addChild(router.root);
   }
 
   /// Adds a route that responds to any request matching the given path.
@@ -231,3 +234,11 @@ class Router extends Extensible {
     return addRoute('PUT', path, handler, middleware: middleware);
   }
 }
+
+class _RootRoute extends Route {
+  _RootRoute():super("/", name: "<root>");
+
+
+  @override
+  String toString() => "ROOT";
+}

test/router/all_tests.dart

@@ -1,6 +1,7 @@
 import 'package:angel_route/angel_route.dart';
 import 'package:test/test.dart';
 import 'fallback.dart' as fallback;
+import 'use.dart' as use;
 
 final ABC = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
 
@@ -44,4 +45,7 @@ main() {
     expect(router.resolve('letter/a/lower'), equals(lower));
     expect(router.resolve('letter/2/lower'), isNull);
   });
+
+
+  test('use', use.main);
 }

test/router/use.dart

@@ -0,0 +1,17 @@
+import 'package:angel_route/angel_route.dart';
+import 'package:test/test.dart';
+
+main() {
+  final parent = new Router()..debug = true;
+  final child = new Router()..debug = true;
+  final a = child.get('a', ['c']);
+  parent.use('child', child);
+  parent.dumpTree();
+
+  group('no params', () {
+    test('resolve', () {
+      expect(parent.resolve('child/a'), equals(a));
+      expect(parent.resolve('a'), isNull);
+    });
+  });
+}