public function testSignatureUrlWithPathParameters()
 {
     $this->request->setBaseUrl('https://api.twitter.com/oauth');
     $this->request->setPath('/statuses/show/:id.json');
     $this->request->setPathParameter(':id', '123');
     $this->assertSame('https://api.twitter.com/oauth/statuses/show/123.json', $this->request->getSignatureUrl());
 }