4 HTTP response freshness testing
8 Check freshness of `req` and `res` headers.
10 When the cache is "fresh" __true__ is returned,
11 otherwise __false__ is returned to indicate that
12 the cache is now stale.
17 var req = { 'if-none-match': 'tobi' };
18 var res = { 'etag': 'luna' };
22 var req = { 'if-none-match': 'tobi' };
23 var res = { 'etag': 'tobi' };