public function testGet()
 {
     $route1 = new Route('/route1');
     $route2 = new Route('/route2');
     $this->collection->add('route1', $route1);
     $this->collection->add('route2', $route2);
     $this->assertSame($route1, $this->accessor->get('route1'));
     $this->assertSame($route2, $this->accessor->get('route2'));
     $this->assertNull($this->accessor->get('unknown'));
 }