public function createFromServerCreatesFieldsFromSpecifiedServerSuperglobal()
{
$server = ['HTTP_FOO' => 'Robusta', 'HTTP_BAR_BAZ' => 'Arabica'];
$headers = Headers::createFromServer($server);
$this->assertEquals('Robusta', $headers->get('Foo'));
$this->assertEquals('Arabica', $headers->get('Bar-Baz'));
}