149 lines
3.3 KiB
Rust
149 lines
3.3 KiB
Rust
// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Random path
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use std::path::*;
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use std::fs;
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use std::env;
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use std::ops::{Deref, DerefMut};
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use rand::random;
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pub struct RandomTempPath {
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path: PathBuf,
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pub panic_on_drop_failure: bool,
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}
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pub fn random_filename() -> String {
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random_str(8)
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}
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pub fn random_str(len: usize) -> String {
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(0..len).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
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}
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impl RandomTempPath {
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pub fn new() -> RandomTempPath {
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let mut dir = env::temp_dir();
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dir.push(random_filename());
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RandomTempPath {
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path: dir.clone(),
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panic_on_drop_failure: true,
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}
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}
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pub fn create_dir() -> RandomTempPath {
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let mut dir = env::temp_dir();
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dir.push(random_filename());
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fs::create_dir_all(dir.as_path()).unwrap();
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RandomTempPath {
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path: dir.clone(),
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panic_on_drop_failure: true,
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}
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}
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pub fn as_path(&self) -> &PathBuf {
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&self.path
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}
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pub fn as_str(&self) -> &str {
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self.path.to_str().unwrap()
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}
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pub fn new_in(&self, name: &str) -> String {
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let mut path = self.path.clone();
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path.push(name);
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path.to_str().unwrap().to_owned()
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}
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}
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impl AsRef<Path> for RandomTempPath {
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fn as_ref(&self) -> &Path {
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self.as_path()
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}
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}
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impl Deref for RandomTempPath {
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type Target = Path;
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fn deref(&self) -> &Self::Target {
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self.as_path()
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}
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}
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impl Drop for RandomTempPath {
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fn drop(&mut self) {
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if let Err(_) = fs::remove_dir_all(&self) {
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if let Err(e) = fs::remove_file(&self) {
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if self.panic_on_drop_failure {
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panic!("Failed to remove temp directory. Here's what prevented this from happening: ({})", e);
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}
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}
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}
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}
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}
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pub struct GuardedTempResult<T> {
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pub result: Option<T>,
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pub _temp: RandomTempPath
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}
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impl<T> GuardedTempResult<T> {
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pub fn reference(&self) -> &T {
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self.result.as_ref().unwrap()
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}
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pub fn reference_mut(&mut self) -> &mut T {
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self.result.as_mut().unwrap()
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}
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pub fn take(&mut self) -> T {
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self.result.take().unwrap()
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}
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}
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impl<T> Deref for GuardedTempResult<T> {
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type Target = T;
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fn deref(&self) -> &T { self.result.as_ref().unwrap() }
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}
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impl<T> DerefMut for GuardedTempResult<T> {
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fn deref_mut(&mut self) -> &mut T { self.result.as_mut().unwrap() }
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}
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#[test]
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fn creates_dir() {
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let temp = RandomTempPath::create_dir();
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assert!(fs::metadata(temp.as_path()).unwrap().is_dir());
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}
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#[test]
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fn destroys_dir() {
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let path_buf = {
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let temp = RandomTempPath::create_dir();
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assert!(fs::metadata(temp.as_path()).unwrap().is_dir());
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let path_buf = temp.as_path().to_path_buf();
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path_buf
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};
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assert!(fs::metadata(&path_buf).is_err());
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}
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#[test]
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fn provides_random() {
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let temp = RandomTempPath::create_dir();
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assert!(temp.as_path().to_str().is_some());
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}
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