support nested directory routes

src/utils/add-route.ts

@@ -15,8 +15,8 @@ export default (router: any, route: Route, opts?: any): void => {
   }
 
   endpoint.path = endpoint.path.map((p: string): string => {
-    const { name } = parse(p);
-    return join('/', name);
+    const { name, dir } = parse(p);
+    return join('/', dir, name);
   });
 
   // if the path is /index, map it to the root route as well

tests/utils/add-route.ts

@@ -98,5 +98,24 @@ describe('utils', () => {
         expect(router.on).toHaveBeenCalledWith(['GET'], '/', expect.any(Function));
       });
     });
+
+    describe('with nested route', () => {
+      const router = {
+        on: jest.fn(),
+      };
+
+      const route = {
+        path: '/multi/level',
+        method: 'GET',
+        handler: jest.fn(),
+      };
+
+      it('adds the nested route', async () => {
+        expect.assertions(2);
+        addRoute(router, route);
+        expect(router.on.mock.calls.length).toBe(1);
+        expect(router.on).toHaveBeenCalledWith(['GET'], '/multi/level', expect.any(Function));
+      });
+    });
   });
 });