src/libstd/sys_common/io.rs

   1 pub const DEFAULT_BUF_SIZE: usize = 8 * 1024;
   2
   3 #[cfg(test)]
   4 #[allow(dead_code)] // not used on emscripten
   5 pub mod test {
   6     use crate::env;
   7     use crate::fs;
   8     use crate::path::{Path, PathBuf};
   9     use rand::RngCore;
  10
  11     pub struct TempDir(PathBuf);
  12
  13     impl TempDir {
  14         pub fn join(&self, path: &str) -> PathBuf {
  15             let TempDir(ref p) = *self;
  16             p.join(path)
  17         }
  18
  19         pub fn path(&self) -> &Path {
  20             let TempDir(ref p) = *self;
  21             p
  22         }
  23     }
  24
  25     impl Drop for TempDir {
  26         fn drop(&mut self) {
  27             // Gee, seeing how we're testing the fs module I sure hope that we
  28             // at least implement this correctly!
  29             let TempDir(ref p) = *self;
  30             fs::remove_dir_all(p).unwrap();
  31         }
  32     }
  33
  34     pub fn tmpdir() -> TempDir {
  35         let p = env::temp_dir();
  36         let mut r = rand::thread_rng();
  37         let ret = p.join(&format!("rust-{}", r.next_u32()));
  38         fs::create_dir(&ret).unwrap();
  39         TempDir(ret)
  40     }
  41 }