public function testGetSetQueryString()
{
$request = new Request();
$request->setRequestUri('/user/profile?user=123');
$this->assertSame('user=123', $request->getQueryString());
$this->assertSame($request, $request->setQueryString('user=456'));
$this->assertSame('user=456', $request->getQueryString());
$this->assertSame('/user/profile?user=456', $request->getRequestUri());
}
