Non api route problem (dingo#1461)

* non-api route problem fix

* Fix tests

* remove unused using

* StyleCI fix

src/Routing/Adapter/Lumen.php

@@ -51,6 +51,20 @@ class Lumen implements Adapter
      */
     protected $routes = [];
 
+    /**
+     * Array of merged old routes and API routes.
+     *
+     * @var array
+     */
+    protected $mergedRoutes = [];
+
+    /**
+     * Routes already defined on the router.
+     *
+     * @var \Illuminate\Routing\RouteCollection
+     */
+    protected $oldRoutes;
+
     /**
      * Indicates if the middleware has been removed from the application instance.
      *
@@ -92,7 +106,7 @@ public function dispatch(Request $request, $version)
 
         $this->removeMiddlewareFromApp();
 
-        $routeCollector = $this->routes[$version];
+        $routeCollector = $this->mergeOldRoutes($version);
         $dispatcher = call_user_func($this->dispatcherResolver, $routeCollector);
 
         $this->app->setDispatcher($dispatcher);
@@ -102,6 +116,28 @@ public function dispatch(Request $request, $version)
         return $this->app->dispatch($request);
     }
 
+    /**
+     * Merge the old application routes with the API routes.
+     *
+     * @param string $version
+     *
+     * @return array
+     */
+    protected function mergeOldRoutes($version)
+    {
+        if (! isset($this->oldRoutes)) {
+            $this->oldRoutes = $this->app->router->getRoutes();
+        }
+        if (! isset($this->mergedRoutes[$version])) {
+            $this->mergedRoutes[$version] = $this->routes[$version];
+            foreach ($this->oldRoutes as $route) {
+                $this->mergedRoutes[$version]->addRoute($route['method'], $route['uri'], $route['action']);
+            }
+        }
+
+        return $this->mergedRoutes[$version];
+    }
+
     /**
      * Normalize the request URI so that Lumen can properly dispatch it.
      *