openethereum/devtools/src/random_path.rs

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Rust
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2016-02-19 15:18:20 +01:00
use std::path::*;
use std::fs;
use std::env;
use rand::random;
pub struct RandomTempPath {
path: PathBuf
}
pub fn random_filename() -> String {
(0..8).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
}
impl RandomTempPath {
pub fn new() -> RandomTempPath {
let mut dir = env::temp_dir();
dir.push(random_filename());
RandomTempPath {
path: dir.clone()
}
}
pub fn create_dir() -> RandomTempPath {
let mut dir = env::temp_dir();
dir.push(random_filename());
fs::create_dir_all(dir.as_path()).unwrap();
RandomTempPath {
path: dir.clone()
}
}
pub fn as_path(&self) -> &PathBuf {
&self.path
}
pub fn as_str(&self) -> &str {
self.path.to_str().unwrap()
}
}
impl Drop for RandomTempPath {
fn drop(&mut self) {
if let Err(e) = fs::remove_dir_all(self.as_path()) {
panic!("failed to remove temp directory, probably something failed to destroyed ({})", e);
}
}
}
#[test]
fn creates_dir() {
let temp = RandomTempPath::create_dir();
assert!(fs::metadata(temp.as_path()).unwrap().is_dir());
}
#[test]
fn destroys_dir() {
let path_buf = {
let temp = RandomTempPath::create_dir();
assert!(fs::metadata(temp.as_path()).unwrap().is_dir());
let path_buf = temp.as_path().to_path_buf();
path_buf
};
assert!(fs::metadata(&path_buf).is_err());
}
#[test]
fn provides_random() {
let temp = RandomTempPath::create_dir();
assert!(temp.as_path().to_str().is_some());
}