std: move "mod tests/benches" to separate files
Also doing fmt inplace as requested.
This commit is contained in:
Lzu Tao
parent
db6cbfc49c
commit
a4e926daee
120 changed files with 16569 additions and 16699 deletions
323
library/std/src/lazy/tests.rs
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323
library/std/src/lazy/tests.rs
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@ -0,0 +1,323 @@
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use crate::{
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lazy::{Lazy, SyncLazy, SyncOnceCell},
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panic,
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sync::{
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atomic::{AtomicUsize, Ordering::SeqCst},
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mpsc::channel,
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Mutex,
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},
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thread,
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};
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#[test]
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fn lazy_default() {
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static CALLED: AtomicUsize = AtomicUsize::new(0);
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struct Foo(u8);
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impl Default for Foo {
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fn default() -> Self {
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CALLED.fetch_add(1, SeqCst);
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Foo(42)
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}
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}
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let lazy: Lazy<Mutex<Foo>> = <_>::default();
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assert_eq!(CALLED.load(SeqCst), 0);
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assert_eq!(lazy.lock().unwrap().0, 42);
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assert_eq!(CALLED.load(SeqCst), 1);
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lazy.lock().unwrap().0 = 21;
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assert_eq!(lazy.lock().unwrap().0, 21);
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assert_eq!(CALLED.load(SeqCst), 1);
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}
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#[test]
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fn lazy_poisoning() {
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let x: Lazy<String> = Lazy::new(|| panic!("kaboom"));
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for _ in 0..2 {
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let res = panic::catch_unwind(panic::AssertUnwindSafe(|| x.len()));
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assert!(res.is_err());
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}
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}
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fn spawn_and_wait<R: Send + 'static>(f: impl FnOnce() -> R + Send + 'static) -> R {
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thread::spawn(f).join().unwrap()
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}
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#[test]
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fn sync_once_cell() {
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static ONCE_CELL: SyncOnceCell<i32> = SyncOnceCell::new();
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assert!(ONCE_CELL.get().is_none());
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spawn_and_wait(|| {
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ONCE_CELL.get_or_init(|| 92);
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assert_eq!(ONCE_CELL.get(), Some(&92));
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});
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ONCE_CELL.get_or_init(|| panic!("Kabom!"));
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assert_eq!(ONCE_CELL.get(), Some(&92));
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}
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#[test]
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fn sync_once_cell_get_mut() {
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let mut c = SyncOnceCell::new();
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assert!(c.get_mut().is_none());
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c.set(90).unwrap();
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*c.get_mut().unwrap() += 2;
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assert_eq!(c.get_mut(), Some(&mut 92));
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}
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#[test]
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fn sync_once_cell_get_unchecked() {
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let c = SyncOnceCell::new();
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c.set(92).unwrap();
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unsafe {
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assert_eq!(c.get_unchecked(), &92);
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}
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}
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#[test]
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fn sync_once_cell_drop() {
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static DROP_CNT: AtomicUsize = AtomicUsize::new(0);
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struct Dropper;
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impl Drop for Dropper {
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fn drop(&mut self) {
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DROP_CNT.fetch_add(1, SeqCst);
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}
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}
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let x = SyncOnceCell::new();
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spawn_and_wait(move || {
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x.get_or_init(|| Dropper);
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assert_eq!(DROP_CNT.load(SeqCst), 0);
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drop(x);
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});
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assert_eq!(DROP_CNT.load(SeqCst), 1);
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}
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#[test]
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fn sync_once_cell_drop_empty() {
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let x = SyncOnceCell::<String>::new();
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drop(x);
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}
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#[test]
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fn clone() {
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let s = SyncOnceCell::new();
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let c = s.clone();
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assert!(c.get().is_none());
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s.set("hello".to_string()).unwrap();
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let c = s.clone();
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assert_eq!(c.get().map(String::as_str), Some("hello"));
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}
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#[test]
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fn get_or_try_init() {
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let cell: SyncOnceCell<String> = SyncOnceCell::new();
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assert!(cell.get().is_none());
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let res = panic::catch_unwind(|| cell.get_or_try_init(|| -> Result<_, ()> { panic!() }));
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assert!(res.is_err());
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assert!(!cell.is_initialized());
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assert!(cell.get().is_none());
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assert_eq!(cell.get_or_try_init(|| Err(())), Err(()));
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assert_eq!(cell.get_or_try_init(|| Ok::<_, ()>("hello".to_string())), Ok(&"hello".to_string()));
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assert_eq!(cell.get(), Some(&"hello".to_string()));
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}
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#[test]
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fn from_impl() {
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assert_eq!(SyncOnceCell::from("value").get(), Some(&"value"));
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assert_ne!(SyncOnceCell::from("foo").get(), Some(&"bar"));
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}
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#[test]
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fn partialeq_impl() {
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assert!(SyncOnceCell::from("value") == SyncOnceCell::from("value"));
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assert!(SyncOnceCell::from("foo") != SyncOnceCell::from("bar"));
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assert!(SyncOnceCell::<String>::new() == SyncOnceCell::new());
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assert!(SyncOnceCell::<String>::new() != SyncOnceCell::from("value".to_owned()));
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}
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#[test]
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fn into_inner() {
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let cell: SyncOnceCell<String> = SyncOnceCell::new();
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assert_eq!(cell.into_inner(), None);
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let cell = SyncOnceCell::new();
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cell.set("hello".to_string()).unwrap();
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assert_eq!(cell.into_inner(), Some("hello".to_string()));
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}
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#[test]
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fn sync_lazy_new() {
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static CALLED: AtomicUsize = AtomicUsize::new(0);
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static SYNC_LAZY: SyncLazy<i32> = SyncLazy::new(|| {
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CALLED.fetch_add(1, SeqCst);
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92
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});
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assert_eq!(CALLED.load(SeqCst), 0);
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spawn_and_wait(|| {
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let y = *SYNC_LAZY - 30;
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assert_eq!(y, 62);
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assert_eq!(CALLED.load(SeqCst), 1);
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});
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let y = *SYNC_LAZY - 30;
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assert_eq!(y, 62);
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assert_eq!(CALLED.load(SeqCst), 1);
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}
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#[test]
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fn sync_lazy_default() {
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static CALLED: AtomicUsize = AtomicUsize::new(0);
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struct Foo(u8);
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impl Default for Foo {
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fn default() -> Self {
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CALLED.fetch_add(1, SeqCst);
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Foo(42)
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}
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}
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let lazy: SyncLazy<Mutex<Foo>> = <_>::default();
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assert_eq!(CALLED.load(SeqCst), 0);
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assert_eq!(lazy.lock().unwrap().0, 42);
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assert_eq!(CALLED.load(SeqCst), 1);
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lazy.lock().unwrap().0 = 21;
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assert_eq!(lazy.lock().unwrap().0, 21);
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assert_eq!(CALLED.load(SeqCst), 1);
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}
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#[test]
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fn static_sync_lazy() {
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static XS: SyncLazy<Vec<i32>> = SyncLazy::new(|| {
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let mut xs = Vec::new();
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xs.push(1);
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xs.push(2);
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xs.push(3);
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xs
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});
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spawn_and_wait(|| {
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assert_eq!(&*XS, &vec![1, 2, 3]);
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});
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assert_eq!(&*XS, &vec![1, 2, 3]);
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}
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#[test]
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fn static_sync_lazy_via_fn() {
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fn xs() -> &'static Vec<i32> {
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static XS: SyncOnceCell<Vec<i32>> = SyncOnceCell::new();
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XS.get_or_init(|| {
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let mut xs = Vec::new();
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xs.push(1);
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xs.push(2);
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xs.push(3);
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xs
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})
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}
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assert_eq!(xs(), &vec![1, 2, 3]);
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}
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#[test]
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fn sync_lazy_poisoning() {
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let x: SyncLazy<String> = SyncLazy::new(|| panic!("kaboom"));
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for _ in 0..2 {
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let res = panic::catch_unwind(|| x.len());
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assert!(res.is_err());
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}
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}
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#[test]
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fn is_sync_send() {
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fn assert_traits<T: Send + Sync>() {}
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assert_traits::<SyncOnceCell<String>>();
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assert_traits::<SyncLazy<String>>();
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}
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#[test]
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fn eval_once_macro() {
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macro_rules! eval_once {
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(|| -> $ty:ty {
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$($body:tt)*
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}) => {{
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static ONCE_CELL: SyncOnceCell<$ty> = SyncOnceCell::new();
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fn init() -> $ty {
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$($body)*
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}
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ONCE_CELL.get_or_init(init)
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}};
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}
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let fib: &'static Vec<i32> = eval_once! {
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|| -> Vec<i32> {
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let mut res = vec![1, 1];
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for i in 0..10 {
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let next = res[i] + res[i + 1];
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res.push(next);
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}
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res
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}
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};
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assert_eq!(fib[5], 8)
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}
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#[test]
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fn sync_once_cell_does_not_leak_partially_constructed_boxes() {
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static ONCE_CELL: SyncOnceCell<String> = SyncOnceCell::new();
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let n_readers = 10;
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let n_writers = 3;
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const MSG: &str = "Hello, World";
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let (tx, rx) = channel();
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for _ in 0..n_readers {
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let tx = tx.clone();
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thread::spawn(move || {
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loop {
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if let Some(msg) = ONCE_CELL.get() {
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tx.send(msg).unwrap();
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break;
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}
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#[cfg(target_env = "sgx")]
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crate::thread::yield_now();
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}
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});
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}
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for _ in 0..n_writers {
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thread::spawn(move || {
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let _ = ONCE_CELL.set(MSG.to_owned());
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});
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}
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for _ in 0..n_readers {
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let msg = rx.recv().unwrap();
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assert_eq!(msg, MSG);
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}
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}
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#[test]
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fn dropck() {
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let cell = SyncOnceCell::new();
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{
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let s = String::new();
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cell.set(&s).unwrap();
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}
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}
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