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std/wasi/testdata/std_fs_file_set_len.rs

Deno standard library
denoland/deno
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// { "preopens": { "/scratch": "scratch" } }
fn main() {  let file = std::fs::File::create("/scratch/file").unwrap();
  assert!(file.set_len(0).is_ok());  assert_eq!(file.metadata().unwrap().len(), 0);
  assert!(file.set_len(5).is_ok());  assert_eq!(file.metadata().unwrap().len(), 5);
  assert!(file.set_len(25).is_ok());  assert_eq!(file.metadata().unwrap().len(), 25);
  assert!(file.set_len(0).is_ok());  assert_eq!(file.metadata().unwrap().len(), 0);}