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#![warn(rust_2018_idioms)]
#![cfg(all(feature = "full", not(tokio_wasi)))] // WASI does not support all fs operations
use std::io::Write;
use tempfile::NamedTempFile;
use tokio::fs::OpenOptions;
use tokio::io::AsyncReadExt;
const HELLO: &[u8] = b"hello world...";
#[tokio::test]
async fn open_with_open_options_and_read() {
let mut tempfile = NamedTempFile::new().unwrap();
tempfile.write_all(HELLO).unwrap();
let mut file = OpenOptions::new().read(true).open(tempfile).await.unwrap();
let mut buf = [0; 1024];
let n = file.read(&mut buf).await.unwrap();
assert_eq!(n, HELLO.len());
assert_eq!(&buf[..n], HELLO);
}
#[tokio::test]
async fn open_options_write() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().write(true)).contains("write: true"));
}
#[tokio::test]
async fn open_options_append() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().append(true)).contains("append: true"));
}
#[tokio::test]
async fn open_options_truncate() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().truncate(true)).contains("truncate: true"));
}
#[tokio::test]
async fn open_options_create() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().create(true)).contains("create: true"));
}
#[tokio::test]
async fn open_options_create_new() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().create_new(true)).contains("create_new: true"));
}
#[tokio::test]
#[cfg(unix)]
async fn open_options_mode() {
// TESTING HACK: use Debug output to check the stored data
assert!(format!("{:?}", OpenOptions::new().mode(0o644)).contains("mode: 420 "));
}
#[tokio::test]
#[cfg(target_os = "linux")]
async fn open_options_custom_flags_linux() {
// TESTING HACK: use Debug output to check the stored data
assert!(
format!("{:?}", OpenOptions::new().custom_flags(libc::O_TRUNC))
.contains("custom_flags: 512,")
);
}
#[tokio::test]
#[cfg(any(target_os = "freebsd", target_os = "macos"))]
async fn open_options_custom_flags_bsd_family() {
// TESTING HACK: use Debug output to check the stored data
assert!(
format!("{:?}", OpenOptions::new().custom_flags(libc::O_NOFOLLOW))
.contains("custom_flags: 256,")
);
}