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use http::HeaderMap;
use http_body::{Body, SizeHint};
use std::pin::Pin;
use std::task::{Context, Poll};
struct Mock {
size_hint: SizeHint,
}
impl Body for Mock {
type Data = ::std::io::Cursor<Vec<u8>>;
type Error = ();
fn poll_data(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
) -> Poll<Option<Result<Self::Data, Self::Error>>> {
Poll::Ready(None)
}
fn poll_trailers(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
) -> Poll<Result<Option<HeaderMap>, Self::Error>> {
Poll::Ready(Ok(None))
}
fn size_hint(&self) -> SizeHint {
self.size_hint.clone()
}
}
#[test]
fn is_end_stream_true() {
let combos = [
(None, None, false),
(Some(123), None, false),
(Some(0), Some(123), false),
(Some(123), Some(123), false),
(Some(0), Some(0), false),
];
for &(lower, upper, is_end_stream) in &combos {
let mut size_hint = SizeHint::new();
assert_eq!(0, size_hint.lower());
assert!(size_hint.upper().is_none());
if let Some(lower) = lower {
size_hint.set_lower(lower);
}
if let Some(upper) = upper {
size_hint.set_upper(upper);
}
let mut mock = Mock { size_hint };
assert_eq!(
is_end_stream,
Pin::new(&mut mock).is_end_stream(),
"size_hint = {:?}",
mock.size_hint.clone()
);
}
}
#[test]
fn is_end_stream_default_false() {
let mut mock = Mock {
size_hint: SizeHint::default(),
};
assert_eq!(
false,
Pin::new(&mut mock).is_end_stream(),
"size_hint = {:?}",
mock.size_hint.clone()
);
}