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use super::*;
#[test]
fn read_vectored_at() {
let msg = b"preadv is working!";
let dir = crate::sys_common::io::test::tmpdir();
let filename = dir.join("preadv.txt");
{
let mut file = fs::File::create(&filename).unwrap();
file.write_all(msg).unwrap();
}
{
let file = fs::File::open(&filename).unwrap();
let mut buf0 = [0; 4];
let mut buf1 = [0; 3];
let mut iovec = [io::IoSliceMut::new(&mut buf0), io::IoSliceMut::new(&mut buf1)];
let n = file.read_vectored_at(&mut iovec, 4).unwrap();
assert!(n == 4 || n == 7);
assert_eq!(&buf0, b"dv i");
if n == 7 {
assert_eq!(&buf1, b"s w");
}
}
}
#[test]
fn write_vectored_at() {
let msg = b"pwritev is not working!";
let dir = crate::sys_common::io::test::tmpdir();
let filename = dir.join("preadv.txt");
{
let mut file = fs::File::create(&filename).unwrap();
file.write_all(msg).unwrap();
}
let expected = {
let file = fs::File::options().write(true).open(&filename).unwrap();
let buf0 = b" ";
let buf1 = b"great ";
let iovec = [io::IoSlice::new(buf0), io::IoSlice::new(buf1)];
let n = file.write_vectored_at(&iovec, 11).unwrap();
assert!(n == 4 || n == 11);
if n == 4 { b"pwritev is working!" } else { b"pwritev is great !" }
};
let content = fs::read(&filename).unwrap();
assert_eq!(&content, expected);
}
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