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use crate::specification::{Create, FileCount};
use log::debug;
use std::fs::File;
use std::path::{Path, PathBuf};
use tempfile::{tempdir_in, TempDir};
use walkdir::WalkDir;
/// Test data management for Obnam benchmarks.
///
/// Each backup in a benchmark backs up some test data created for
/// that backup. That data is later cleaned up. Is all handled by this
/// structure.
#[derive(Debug)]
pub struct Data {
live: TempDir,
}
/// Possible errors from managing data.
#[derive(Debug, thiserror::Error)]
pub enum DataError {
/// Directory creation failed.
#[error("Failed to create directory {0}: {1}")]
CreateDirectory(PathBuf, std::io::Error),
/// File creation failed.
#[error("Failed to create file {0}: {1}")]
CreateFile(PathBuf, std::io::Error),
/// File counting failed.
#[error("Failed to count files in {0}: {1}")]
CountFiles(PathBuf, walkdir::Error),
/// Failed to create a temporary directory.
#[error(transparent)]
CreateTemp(#[from] std::io::Error),
}
impl Data {
pub(crate) fn new(tempdir: &Path) -> Result<Self, DataError> {
let live = tempdir_in(&tempdir)?;
debug!("created temporary directory {}", live.path().display());
Ok(Self { live })
}
pub(crate) fn create(&self, create: &Create) -> Result<(), DataError> {
debug!(
"creating {} files in {}",
create.files,
self.live.path().display()
);
for i in 0..create.files {
let filename = self.live.path().join(format!("{}", i));
debug!("creating {}", filename.display());
File::create(&filename).map_err(|err| DataError::CreateFile(filename, err))?;
}
Ok(())
}
pub(crate) fn rename(&self, count: &FileCount) -> Result<(), DataError> {
debug!("renaming {} files", count.files);
Ok(())
}
pub(crate) fn delete(&self, count: &FileCount) -> Result<(), DataError> {
debug!("deleting {}", count.files);
Ok(())
}
pub(crate) fn file_count(&self) -> Result<u64, DataError> {
debug!("counting files in {}", self.live.path().display());
let mut n = 0;
for entry in WalkDir::new(&self.live).into_iter() {
if let Err(err) = entry {
return Err(DataError::CountFiles(self.live.path().to_path_buf(), err));
}
n += 1;
}
debug!("found {} files in {}", n, self.live.path().display());
Ok(n)
}
pub(crate) fn file_size(&self) -> Result<u64, DataError> {
debug!(
"counting combined slze of files in {}",
self.live.path().display()
);
let n = 0;
debug!(
"found {} bytes of data in {}",
n,
self.live.path().display()
);
Ok(n)
}
}
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