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use header::HttpDate;
header! {
/// `If-Unmodified-Since` header, defined in
/// [RFC7232](http://tools.ietf.org/html/rfc7232#section-3.4)
///
/// The `If-Unmodified-Since` header field makes the request method
/// conditional on the selected representation's last modification date
/// being earlier than or equal to the date provided in the field-value.
/// This field accomplishes the same purpose as If-Match for cases where
/// the user agent does not have an entity-tag for the representation.
///
/// # ABNF
///
/// ```text
/// If-Unmodified-Since = HTTP-date
/// ```
///
/// # Example values
///
/// * `Sat, 29 Oct 1994 19:43:31 GMT`
///
/// # Example
///
/// ```
/// use hyper::header::{Headers, IfUnmodifiedSince};
/// use std::time::{SystemTime, Duration};
///
/// let mut headers = Headers::new();
/// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
/// headers.set(IfUnmodifiedSince(modified.into()));
/// ```
(IfUnmodifiedSince, "If-Unmodified-Since") => [HttpDate]
test_if_unmodified_since {
// Testcase from RFC
test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);
}
}
bench_header!(imf_fixdate, IfUnmodifiedSince, { vec![b"Sun, 07 Nov 1994 08:48:37 GMT".to_vec()] });
bench_header!(rfc_850, IfUnmodifiedSince, { vec![b"Sunday, 06-Nov-94 08:49:37 GMT".to_vec()] });
bench_header!(asctime, IfUnmodifiedSince, { vec![b"Sun Nov 6 08:49:37 1994".to_vec()] });