public function testGetVary() {
$response = new Response();
$this
->assertEquals(array(), $response
->getVary(), '->getVary() returns an empty array if no Vary header is present');
$response = new Response();
$response->headers
->set('Vary', 'Accept-Language');
$this
->assertEquals(array(
'Accept-Language',
), $response
->getVary(), '->getVary() parses a single header name value');
$response = new Response();
$response->headers
->set('Vary', 'Accept-Language User-Agent X-Foo');
$this
->assertEquals(array(
'Accept-Language',
'User-Agent',
'X-Foo',
), $response
->getVary(), '->getVary() parses multiple header name values separated by spaces');
$response = new Response();
$response->headers
->set('Vary', 'Accept-Language,User-Agent, X-Foo');
$this
->assertEquals(array(
'Accept-Language',
'User-Agent',
'X-Foo',
), $response
->getVary(), '->getVary() parses multiple header name values separated by commas');
}