45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
use futures::executor::block_on;
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use futures::future::{Future, FutureExt};
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use futures::io::{AsyncReadExt, Cursor};
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use futures::stream::{self, StreamExt, TryStreamExt};
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use futures::task::Poll;
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use futures_test::io::AsyncReadTestExt;
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use futures_test::task::noop_context;
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#[test]
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fn read_to_string() {
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let mut c = Cursor::new(&b""[..]);
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let mut v = String::new();
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assert_eq!(block_on(c.read_to_string(&mut v)).unwrap(), 0);
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assert_eq!(v, "");
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let mut c = Cursor::new(&b"1"[..]);
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let mut v = String::new();
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assert_eq!(block_on(c.read_to_string(&mut v)).unwrap(), 1);
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assert_eq!(v, "1");
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let mut c = Cursor::new(&b"\xff"[..]);
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let mut v = String::new();
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assert!(block_on(c.read_to_string(&mut v)).is_err());
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}
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#[test]
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fn interleave_pending() {
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fn run<F: Future + Unpin>(mut f: F) -> F::Output {
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let mut cx = noop_context();
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loop {
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if let Poll::Ready(x) = f.poll_unpin(&mut cx) {
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return x;
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}
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}
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}
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let mut buf = stream::iter(vec![&b"12"[..], &b"33"[..], &b"3"[..]])
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.map(Ok)
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.into_async_read()
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.interleave_pending();
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let mut v = String::new();
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assert_eq!(run(buf.read_to_string(&mut v)).unwrap(), 5);
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assert_eq!(v, "12333");
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}
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