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std/wasi/testdata/std_fs_file_seek.rs

Deno standard library
denoland/deno
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// { "preopens": { "/fixture": "fixture" } }
use std::io::Seek;
fn main() {  let mut file = std::fs::File::open("/fixture/file").unwrap();  assert_eq!(file.seek(std::io::SeekFrom::Current(0)).unwrap(), 0);
  assert_eq!(file.seek(std::io::SeekFrom::Start(1)).unwrap(), 1);  assert_eq!(file.seek(std::io::SeekFrom::Start(2)).unwrap(), 2);  assert_eq!(file.seek(std::io::SeekFrom::Start(3)).unwrap(), 3);  assert_eq!(file.seek(std::io::SeekFrom::Start(4)).unwrap(), 4);  assert_eq!(file.seek(std::io::SeekFrom::Start(5)).unwrap(), 5);
  assert_eq!(file.seek(std::io::SeekFrom::Current(-1)).unwrap(), 4);  assert_eq!(file.seek(std::io::SeekFrom::Current(-1)).unwrap(), 3);  assert_eq!(file.seek(std::io::SeekFrom::Current(-1)).unwrap(), 2);  assert_eq!(file.seek(std::io::SeekFrom::Current(-1)).unwrap(), 1);  assert_eq!(file.seek(std::io::SeekFrom::Current(-1)).unwrap(), 0);
  assert_eq!(file.seek(std::io::SeekFrom::Current(1)).unwrap(), 1);  assert_eq!(file.seek(std::io::SeekFrom::Current(1)).unwrap(), 2);  assert_eq!(file.seek(std::io::SeekFrom::Current(1)).unwrap(), 3);  assert_eq!(file.seek(std::io::SeekFrom::Current(1)).unwrap(), 4);  assert_eq!(file.seek(std::io::SeekFrom::Current(1)).unwrap(), 5);
  assert_eq!(file.seek(std::io::SeekFrom::End(0)).unwrap(), 5);  assert_eq!(file.seek(std::io::SeekFrom::End(-1)).unwrap(), 4);  assert_eq!(file.seek(std::io::SeekFrom::End(-2)).unwrap(), 3);  assert_eq!(file.seek(std::io::SeekFrom::End(-3)).unwrap(), 2);  assert_eq!(file.seek(std::io::SeekFrom::End(-4)).unwrap(), 1);  assert_eq!(file.seek(std::io::SeekFrom::End(-5)).unwrap(), 0);}