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use std::io::prelude::*;
#[cfg(unix)]
use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};
use monoio::fs::File;
use tempfile::NamedTempFile;
const HELLO: &[u8] = b"hello world...";
async fn read_hello(file: &File) {
let buf = Vec::with_capacity(1024);
let (res, buf) = file.read_at(buf, 0).await;
let n = res.unwrap();
assert!(n > 0 && n <= HELLO.len());
assert_eq!(&buf, &HELLO[..n]);
}
#[cfg(unix)]
#[monoio::test_all]
async fn basic_read() {
let mut tempfile = tempfile();
tempfile.write_all(HELLO).unwrap();
let file = File::open(tempfile.path()).await.unwrap();
read_hello(&file).await;
}
#[cfg(unix)]
#[monoio::test_all]
async fn basic_read_exact() {
let mut tempfile = tempfile();
tempfile.write_all(HELLO).unwrap();
let file = File::open(tempfile.path()).await.unwrap();
let buf = Vec::with_capacity(HELLO.len());
let (res, buf) = file.read_exact_at(buf, 0).await;
res.unwrap();
assert_eq!(&buf[..], HELLO);
let buf = Vec::with_capacity(HELLO.len() * 2);
let (res, _) = file.read_exact_at(buf, 0).await;
assert_eq!(res.unwrap_err().kind(), std::io::ErrorKind::UnexpectedEof);
}
#[cfg(unix)]
#[monoio::test_all]
async fn basic_write() {
let tempfile = tempfile();
let file = File::create(tempfile.path()).await.unwrap();
file.write_at(HELLO, 0).await.0.unwrap();
let file = std::fs::read(tempfile.path()).unwrap();
assert_eq!(file, HELLO);
}
#[cfg(unix)]
#[monoio::test_all]
async fn basic_write_all() {
let tempfile = tempfile();
let file = File::create(tempfile.path()).await.unwrap();
file.write_all_at(HELLO, 0).await.0.unwrap();
let file = std::fs::read(tempfile.path()).unwrap();
assert_eq!(file, HELLO);
}
#[cfg(unix)]
#[monoio::test(driver = "uring")]
async fn cancel_read() {
let mut tempfile = tempfile();
tempfile.write_all(HELLO).unwrap();
let file = File::open(tempfile.path()).await.unwrap();
// Poll the future once, then cancel it
poll_once(async { read_hello(&file).await }).await;
read_hello(&file).await;
}
#[cfg(unix)]
#[monoio::test_all]
async fn explicit_close() {
let mut tempfile = tempfile();
tempfile.write_all(HELLO).unwrap();
let file = File::open(tempfile.path()).await.unwrap();
let fd = file.as_raw_fd();
file.close().await.unwrap();
assert_invalid_fd(fd);
}
#[cfg(unix)]
#[monoio::test_all]
async fn drop_open() {
let tempfile = tempfile();
// Do something else
let file_w = File::create(tempfile.path()).await.unwrap();
file_w.write_at(HELLO, 0).await.0.unwrap();
let file = std::fs::read(tempfile.path()).unwrap();
assert_eq!(file, HELLO);
drop(file_w);
}
#[cfg(unix)]
#[test]
fn drop_off_runtime() {
let tempfile = tempfile();
#[cfg(target_os = "linux")]
let file = monoio::start::<monoio::IoUringDriver, _>(async {
File::open(tempfile.path()).await.unwrap()
});
#[cfg(not(target_os = "linux"))]
let file = monoio::start::<monoio::LegacyDriver, _>(async {
File::open(tempfile.path()).await.unwrap()
});
let fd = file.as_raw_fd();
drop(file);
assert_invalid_fd(fd);
}
#[cfg(unix)]
#[monoio::test_all]
async fn sync_doesnt_kill_anything() {
let tempfile = tempfile();
let file = File::create(tempfile.path()).await.unwrap();
file.sync_all().await.unwrap();
file.sync_data().await.unwrap();
file.write_at(&b"foo"[..], 0).await.0.unwrap();
file.sync_all().await.unwrap();
file.sync_data().await.unwrap();
}
#[cfg(unix)]
fn tempfile() -> NamedTempFile {
NamedTempFile::new().expect("unable to create tempfile")
}
#[cfg(unix)]
#[allow(unused)]
async fn poll_once(future: impl std::future::Future) {
use std::task::Poll;
use futures::future::poll_fn;
use monoio::pin;
pin!(future);
poll_fn(|cx| {
assert!(future.as_mut().poll(cx).is_pending());
Poll::Ready(())
})
.await;
}
#[cfg(unix)]
fn assert_invalid_fd(fd: RawFd) {
use std::fs::File;
let mut f = unsafe { File::from_raw_fd(fd) };
let mut buf = vec![];
assert!(f.read_to_end(&mut buf).is_err());
}
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