function testServerReturnsLastModifiedHeader()
{
// Modify the mtime of a file deep in the dependency graph
$time = time();
touch(__DIR__ . "/fixtures/directive_processor/module/ui/base.js", $time);
$request = Request::create('application.js');
$response = $this->server->dispatch($request);
// Check if the Last Modified header
$lastModified = $response->headers->get('Last-Modified');
$this->assertEquals($time, strtotime($lastModified));
}