Revision control
Copy as Markdown
Other Tools
#![deny(rust_2018_idioms)]
use std::env;
use std::ffi::{OsStr, OsString};
use std::fs::File;
use std::io::{Read, Seek, SeekFrom, Write};
use std::path::{Path, PathBuf};
use tempfile::{tempdir, Builder, NamedTempFile, TempPath};
fn exists<P: AsRef<Path>>(path: P) -> bool {
std::fs::metadata(path.as_ref()).is_ok()
}
#[test]
fn test_prefix() {
let tmpfile = NamedTempFile::with_prefix("prefix").unwrap();
let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
assert!(name.starts_with("prefix"));
}
#[test]
fn test_basic() {
let mut tmpfile = NamedTempFile::new().unwrap();
write!(tmpfile, "abcde").unwrap();
tmpfile.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
tmpfile.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
#[test]
fn test_deleted() {
let tmpfile = NamedTempFile::new().unwrap();
let path = tmpfile.path().to_path_buf();
assert!(exists(&path));
drop(tmpfile);
assert!(!exists(&path));
}
#[test]
fn test_persist() {
let mut tmpfile = NamedTempFile::new().unwrap();
let old_path = tmpfile.path().to_path_buf();
let persist_path = env::temp_dir().join("persisted_temporary_file");
write!(tmpfile, "abcde").unwrap();
{
assert!(exists(&old_path));
let mut f = tmpfile.persist(&persist_path).unwrap();
assert!(!exists(&old_path));
// Check original file
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
{
// Try opening it at the new path.
let mut f = File::open(&persist_path).unwrap();
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
std::fs::remove_file(&persist_path).unwrap();
}
#[test]
fn test_persist_noclobber() {
let mut tmpfile = NamedTempFile::new().unwrap();
let old_path = tmpfile.path().to_path_buf();
let persist_target = NamedTempFile::new().unwrap();
let persist_path = persist_target.path().to_path_buf();
write!(tmpfile, "abcde").unwrap();
assert!(exists(&old_path));
{
tmpfile = tmpfile.persist_noclobber(&persist_path).unwrap_err().into();
assert!(exists(&old_path));
std::fs::remove_file(&persist_path).unwrap();
drop(persist_target);
}
tmpfile.persist_noclobber(&persist_path).unwrap();
// Try opening it at the new path.
let mut f = File::open(&persist_path).unwrap();
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
std::fs::remove_file(&persist_path).unwrap();
}
#[test]
fn test_customnamed() {
let tmpfile = Builder::new()
.prefix("tmp")
.suffix(&".rs")
.rand_bytes(12)
.tempfile()
.unwrap();
let name = tmpfile.path().file_name().unwrap().to_str().unwrap();
assert!(name.starts_with("tmp"));
assert!(name.ends_with(".rs"));
assert_eq!(name.len(), 18);
}
#[test]
fn test_append() {
let mut tmpfile = Builder::new().append(true).tempfile().unwrap();
tmpfile.write_all(b"a").unwrap();
tmpfile.seek(SeekFrom::Start(0)).unwrap();
tmpfile.write_all(b"b").unwrap();
tmpfile.seek(SeekFrom::Start(0)).unwrap();
let mut buf = vec![0u8; 1];
tmpfile.read_exact(&mut buf).unwrap();
assert_eq!(buf, b"a");
}
#[test]
fn test_reopen() {
let source = NamedTempFile::new().unwrap();
let mut first = source.reopen().unwrap();
let mut second = source.reopen().unwrap();
drop(source);
write!(first, "abcde").expect("write failed");
let mut buf = String::new();
second.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
#[test]
fn test_into_file() {
let mut file = NamedTempFile::new().unwrap();
let path = file.path().to_owned();
write!(file, "abcde").expect("write failed");
assert!(path.exists());
let mut file = file.into_file();
assert!(!path.exists());
file.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
file.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
#[test]
fn test_immut() {
let tmpfile = NamedTempFile::new().unwrap();
(&tmpfile).write_all(b"abcde").unwrap();
(&tmpfile).seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
(&tmpfile).read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
#[test]
fn test_temppath() {
let mut tmpfile = NamedTempFile::new().unwrap();
write!(tmpfile, "abcde").unwrap();
let path = tmpfile.into_temp_path();
assert!(path.is_file());
}
#[test]
fn test_temppath_persist() {
let mut tmpfile = NamedTempFile::new().unwrap();
write!(tmpfile, "abcde").unwrap();
let tmppath = tmpfile.into_temp_path();
let old_path = tmppath.to_path_buf();
let persist_path = env::temp_dir().join("persisted_temppath_file");
{
assert!(exists(&old_path));
tmppath.persist(&persist_path).unwrap();
assert!(!exists(&old_path));
}
{
// Try opening it at the new path.
let mut f = File::open(&persist_path).unwrap();
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
std::fs::remove_file(&persist_path).unwrap();
}
#[test]
fn test_temppath_persist_noclobber() {
let mut tmpfile = NamedTempFile::new().unwrap();
write!(tmpfile, "abcde").unwrap();
let mut tmppath = tmpfile.into_temp_path();
let old_path = tmppath.to_path_buf();
let persist_target = NamedTempFile::new().unwrap();
let persist_path = persist_target.path().to_path_buf();
assert!(exists(&old_path));
{
tmppath = tmppath.persist_noclobber(&persist_path).unwrap_err().into();
assert!(exists(&old_path));
std::fs::remove_file(&persist_path).unwrap();
drop(persist_target);
}
tmppath.persist_noclobber(&persist_path).unwrap();
// Try opening it at the new path.
let mut f = File::open(&persist_path).unwrap();
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
std::fs::remove_file(&persist_path).unwrap();
}
#[test]
fn temp_path_from_existing() {
let tmp_dir = tempdir().unwrap();
let tmp_file_path_1 = tmp_dir.path().join("testfile1");
let tmp_file_path_2 = tmp_dir.path().join("testfile2");
File::create(&tmp_file_path_1).unwrap();
assert!(tmp_file_path_1.exists(), "Test file 1 hasn't been created");
File::create(&tmp_file_path_2).unwrap();
assert!(tmp_file_path_2.exists(), "Test file 2 hasn't been created");
let tmp_path = TempPath::from_path(&tmp_file_path_1);
assert!(
tmp_file_path_1.exists(),
"Test file has been deleted before dropping TempPath"
);
drop(tmp_path);
assert!(
!tmp_file_path_1.exists(),
"Test file exists after dropping TempPath"
);
assert!(
tmp_file_path_2.exists(),
"Test file 2 has been deleted before dropping TempDir"
);
}
#[test]
#[allow(unreachable_code)]
fn temp_path_from_argument_types() {
// This just has to compile
return;
TempPath::from_path("");
TempPath::from_path(String::new());
TempPath::from_path(OsStr::new(""));
TempPath::from_path(OsString::new());
TempPath::from_path(Path::new(""));
TempPath::from_path(PathBuf::new());
TempPath::from_path(PathBuf::new().into_boxed_path());
}
#[test]
fn test_write_after_close() {
let path = NamedTempFile::new().unwrap().into_temp_path();
File::create(path).unwrap().write_all(b"test").unwrap();
}
#[test]
fn test_change_dir() {
env::set_current_dir(env::temp_dir()).unwrap();
let tmpfile = NamedTempFile::new_in(".").unwrap();
let path = env::current_dir().unwrap().join(tmpfile.path());
env::set_current_dir("/").unwrap();
drop(tmpfile);
assert!(!exists(path))
}
#[test]
fn test_into_parts() {
let mut file = NamedTempFile::new().unwrap();
write!(file, "abcd").expect("write failed");
let (mut file, temp_path) = file.into_parts();
let path = temp_path.to_path_buf();
assert!(path.exists());
drop(temp_path);
assert!(!path.exists());
write!(file, "efgh").expect("write failed");
file.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
file.read_to_string(&mut buf).unwrap();
assert_eq!("abcdefgh", buf);
}
#[test]
fn test_from_parts() {
let mut file = NamedTempFile::new().unwrap();
write!(file, "abcd").expect("write failed");
let (file, temp_path) = file.into_parts();
let file = NamedTempFile::from_parts(file, temp_path);
assert!(file.path().exists());
}
#[test]
fn test_keep() {
let mut tmpfile = NamedTempFile::new().unwrap();
write!(tmpfile, "abcde").unwrap();
let (mut f, temp_path) = tmpfile.into_parts();
let path;
{
assert!(exists(&temp_path));
path = temp_path.keep().unwrap();
assert!(exists(&path));
// Check original file
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
{
// Try opening it again.
let mut f = File::open(&path).unwrap();
f.seek(SeekFrom::Start(0)).unwrap();
let mut buf = String::new();
f.read_to_string(&mut buf).unwrap();
assert_eq!("abcde", buf);
}
std::fs::remove_file(&path).unwrap();
}
#[test]
fn test_make() {
let tmpfile = Builder::new().make(|path| File::create(path)).unwrap();
assert!(tmpfile.path().is_file());
}
#[test]
fn test_make_in() {
let tmp_dir = tempdir().unwrap();
let tmpfile = Builder::new()
.make_in(tmp_dir.path(), |path| File::create(path))
.unwrap();
assert!(tmpfile.path().is_file());
assert_eq!(tmpfile.path().parent(), Some(tmp_dir.path()));
}
#[test]
fn test_make_fnmut() {
let mut count = 0;
// Show that an FnMut can be used.
let tmpfile = Builder::new()
.make(|path| {
count += 1;
File::create(path)
})
.unwrap();
assert!(tmpfile.path().is_file());
}
#[cfg(unix)]
#[test]
fn test_make_uds() {
use std::os::unix::net::UnixListener;
let temp_sock = Builder::new()
.prefix("tmp")
.suffix(".sock")
.rand_bytes(12)
.make(|path| UnixListener::bind(path))
.unwrap();
assert!(temp_sock.path().exists());
}
#[cfg(unix)]
#[test]
fn test_make_uds_conflict() {
use std::os::unix::net::UnixListener;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
// Check that retries happen correctly by racing N different threads.
const NTHREADS: usize = 20;
// The number of times our callback was called.
let tries = Arc::new(AtomicUsize::new(0));
let mut threads = Vec::with_capacity(NTHREADS);
for _ in 0..NTHREADS {
let tries = tries.clone();
threads.push(std::thread::spawn(move || {
// Ensure that every thread uses the same seed so we are guaranteed
// to retry. Note that fastrand seeds are thread-local.
fastrand::seed(42);
Builder::new()
.prefix("tmp")
.suffix(".sock")
.rand_bytes(12)
.make(|path| {
tries.fetch_add(1, Ordering::Relaxed);
UnixListener::bind(path)
})
}));
}
// Join all threads, but don't drop the temp file yet. Otherwise, we won't
// get a deterministic number of `tries`.
let sockets: Vec<_> = threads
.into_iter()
.map(|thread| thread.join().unwrap().unwrap())
.collect();
// Number of tries is exactly equal to (n*(n+1))/2.
assert_eq!(
tries.load(Ordering::Relaxed),
(NTHREADS * (NTHREADS + 1)) / 2
);
for socket in sockets {
assert!(socket.path().exists());
}
}
// Issue #224.
#[test]
fn test_overly_generic_bounds() {
pub struct Foo<T>(T);
impl<T> Foo<T>
where
T: Sync + Send + 'static,
for<'a> &'a T: Write + Read,
{
pub fn new(foo: T) -> Self {
Self(foo)
}
}
// Don't really need to run this. Only care if it compiles.
if let Ok(file) = File::open("i_do_not_exist") {
let mut f;
let _x = {
f = Foo::new(file);
&mut f
};
}
}