openethereum/ethstore/tests/util/transient_dir.rs

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// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use std::path::PathBuf;
use std::{env, fs};
use rand::{Rng, OsRng};
use ethstore::dir::{KeyDirectory, DiskDirectory};
use ethstore::{Error, SafeAccount};
pub fn random_dir() -> PathBuf {
let mut rng = OsRng::new().unwrap();
let mut dir = env::temp_dir();
dir.push(format!("{:x}-{:x}", rng.next_u64(), rng.next_u64()));
dir
}
pub struct TransientDir {
dir: DiskDirectory,
path: PathBuf,
}
impl TransientDir {
pub fn create() -> Result<Self, Error> {
let path = random_dir();
let result = TransientDir {
dir: try!(DiskDirectory::create(&path)),
path: path,
};
Ok(result)
}
pub fn open() -> Self {
let path = random_dir();
TransientDir {
dir: DiskDirectory::at(&path),
path: path,
}
}
}
impl Drop for TransientDir {
fn drop(&mut self) {
fs::remove_dir_all(&self.path).expect("Expected to remove temp dir");
}
}
impl KeyDirectory for TransientDir {
fn load(&self) -> Result<Vec<SafeAccount>, Error> {
self.dir.load()
}
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fn update(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
self.dir.update(account)
}
fn insert(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
self.dir.insert(account)
}
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fn remove(&self, account: &SafeAccount) -> Result<(), Error> {
self.dir.remove(account)
}
}