84ac80f192
The previous commit updated `rustfmt.toml` appropriately. This commit is the outcome of running `x fmt --all` with the new formatting options.
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
#![allow(unused)]
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use std::path::{Path, PathBuf};
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use std::{env, fs, thread};
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use rand::RngCore;
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/// Copied from `std::test_helpers::test_rng`, since these tests rely on the
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/// seed not being the same for every RNG invocation too.
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#[track_caller]
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pub(crate) fn test_rng() -> rand_xorshift::XorShiftRng {
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use core::hash::{BuildHasher, Hash, Hasher};
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let mut hasher = std::hash::RandomState::new().build_hasher();
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core::panic::Location::caller().hash(&mut hasher);
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let hc64 = hasher.finish();
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let seed_vec = hc64.to_le_bytes().into_iter().chain(0u8..8).collect::<Vec<u8>>();
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let seed: [u8; 16] = seed_vec.as_slice().try_into().unwrap();
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rand::SeedableRng::from_seed(seed)
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}
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// Copied from std::sys_common::io
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pub(crate) struct TempDir(PathBuf);
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impl TempDir {
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pub(crate) fn join(&self, path: &str) -> PathBuf {
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let TempDir(ref p) = *self;
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p.join(path)
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}
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pub(crate) fn path(&self) -> &Path {
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let TempDir(ref p) = *self;
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p
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}
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}
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impl Drop for TempDir {
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fn drop(&mut self) {
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// Gee, seeing how we're testing the fs module I sure hope that we
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// at least implement this correctly!
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let TempDir(ref p) = *self;
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let result = fs::remove_dir_all(p);
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// Avoid panicking while panicking as this causes the process to
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// immediately abort, without displaying test results.
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if !thread::panicking() {
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result.unwrap();
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}
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}
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}
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#[track_caller] // for `test_rng`
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pub(crate) fn tmpdir() -> TempDir {
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let p = env::temp_dir();
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let mut r = test_rng();
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let ret = p.join(&format!("rust-{}", r.next_u32()));
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fs::create_dir(&ret).unwrap();
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TempDir(ret)
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}
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