Imbo\Http\Request\Request::getExtension PHP Method

    public function getExtension()
    {
        return $this->route ? $this->route->get('extension') : null;
    }

 /**
  * @covers Imbo\Http\Request\Request::getExtension
  */
 public function testSetGetExtension()
 {
     $extension = 'jpg';
     $this->assertNull($this->request->getExtension());
     $route = new Route();
     $this->request->setRoute($route);
     $this->assertNull($this->request->getExtension());
     $route->set('extension', $extension);
     $this->assertSame($extension, $this->request->getExtension());
 }