added an exception if a route with the same name is added twice

this will for example detect cases of getAction() vs getArticleAction() inside a controller named ArticleController

Routing/Loader/Reader/RestActionReader.php

@@ -171,6 +171,10 @@ public function read(RestRouteCollection $collection, \ReflectionMethod $method,
 
         // generated parameters
         $routeName    = $this->namePrefix.strtolower($routeName);
+        if ($collection->has($routeName)) {
+            throw new \InvalidArgumentException("There already is a method that resulted in defining a route '$routeName'");
+        }
+
         $pattern      = implode('/', $urlParts);
         $defaults     = array('_controller' => $method->getName());
         $requirements = array('_method' => strtoupper($httpMethod));

Routing/RestRouteCollection.php

@@ -22,6 +22,19 @@ class RestRouteCollection extends RouteCollection
 {
     private $singularName;
 
+    /**
+     * Checks if there is already a route by the same name in the collection.
+     *
+     * @param string $name  The route name
+     *
+     * @api
+     */
+    public function has($name)
+    {
+        $routes = $this->all();
+        return isset($routes[$name]);
+    }
+
     /**
      * Set collection singular name.
      *