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#![warn(rust_2018_idioms)]
#![cfg(feature = "full")]
use tokio::io::{AsyncWrite, AsyncWriteExt};
use std::io;
use std::pin::Pin;
use std::task::{Context, Poll};
#[tokio::test]
async fn write_int_should_err_if_write_count_0() {
struct Wr {}
impl AsyncWrite for Wr {
fn poll_write(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
_buf: &[u8],
) -> Poll<io::Result<usize>> {
Ok(0).into()
}
fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<io::Result<()>> {
Ok(()).into()
}
fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<io::Result<()>> {
Ok(()).into()
}
}
let mut wr = Wr {};
// should be ok just to test these 2, other cases actually expanded by same macro.
assert!(wr.write_i8(0).await.is_err());
assert!(wr.write_i32(12).await.is_err());
}