diff options
Diffstat (limited to 'vendor/once_cell/tests/it/unsync_once_cell.rs')
-rw-r--r-- | vendor/once_cell/tests/it/unsync_once_cell.rs | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/vendor/once_cell/tests/it/unsync_once_cell.rs b/vendor/once_cell/tests/it/unsync_once_cell.rs deleted file mode 100644 index 124cc3e..0000000 --- a/vendor/once_cell/tests/it/unsync_once_cell.rs +++ /dev/null @@ -1,154 +0,0 @@ -use core::{ - cell::Cell, - sync::atomic::{AtomicUsize, Ordering::SeqCst}, -}; - -use once_cell::unsync::OnceCell; - -#[test] -fn once_cell() { - let c = OnceCell::new(); - assert!(c.get().is_none()); - c.get_or_init(|| 92); - assert_eq!(c.get(), Some(&92)); - - c.get_or_init(|| panic!("Kabom!")); - assert_eq!(c.get(), Some(&92)); -} - -#[test] -fn once_cell_with_value() { - const CELL: OnceCell<i32> = OnceCell::with_value(12); - let cell = CELL; - assert_eq!(cell.get(), Some(&12)); -} - -#[test] -fn once_cell_get_mut() { - let mut c = OnceCell::new(); - assert!(c.get_mut().is_none()); - c.set(90).unwrap(); - *c.get_mut().unwrap() += 2; - assert_eq!(c.get_mut(), Some(&mut 92)); -} - -#[test] -fn once_cell_drop() { - static DROP_CNT: AtomicUsize = AtomicUsize::new(0); - struct Dropper; - impl Drop for Dropper { - fn drop(&mut self) { - DROP_CNT.fetch_add(1, SeqCst); - } - } - - let x = OnceCell::new(); - x.get_or_init(|| Dropper); - assert_eq!(DROP_CNT.load(SeqCst), 0); - drop(x); - assert_eq!(DROP_CNT.load(SeqCst), 1); -} - -#[test] -fn once_cell_drop_empty() { - let x = OnceCell::<String>::new(); - drop(x); -} - -#[test] -fn clone() { - let s = OnceCell::new(); - let c = s.clone(); - assert!(c.get().is_none()); - - s.set("hello".to_string()).unwrap(); - let c = s.clone(); - assert_eq!(c.get().map(String::as_str), Some("hello")); -} - -#[test] -fn get_or_try_init() { - let cell: OnceCell<String> = OnceCell::new(); - assert!(cell.get().is_none()); - - let res = std::panic::catch_unwind(|| cell.get_or_try_init(|| -> Result<_, ()> { panic!() })); - assert!(res.is_err()); - assert!(cell.get().is_none()); - - assert_eq!(cell.get_or_try_init(|| Err(())), Err(())); - - assert_eq!(cell.get_or_try_init(|| Ok::<_, ()>("hello".to_string())), Ok(&"hello".to_string())); - assert_eq!(cell.get(), Some(&"hello".to_string())); -} - -#[test] -fn from_impl() { - assert_eq!(OnceCell::from("value").get(), Some(&"value")); - assert_ne!(OnceCell::from("foo").get(), Some(&"bar")); -} - -#[test] -fn partialeq_impl() { - assert!(OnceCell::from("value") == OnceCell::from("value")); - assert!(OnceCell::from("foo") != OnceCell::from("bar")); - - assert!(OnceCell::<String>::new() == OnceCell::new()); - assert!(OnceCell::<String>::new() != OnceCell::from("value".to_owned())); -} - -#[test] -fn into_inner() { - let cell: OnceCell<String> = OnceCell::new(); - assert_eq!(cell.into_inner(), None); - let cell = OnceCell::new(); - cell.set("hello".to_string()).unwrap(); - assert_eq!(cell.into_inner(), Some("hello".to_string())); -} - -#[test] -fn debug_impl() { - let cell = OnceCell::new(); - assert_eq!(format!("{:#?}", cell), "OnceCell(Uninit)"); - cell.set(vec!["hello", "world"]).unwrap(); - assert_eq!( - format!("{:#?}", cell), - r#"OnceCell( - [ - "hello", - "world", - ], -)"# - ); -} - -#[test] -#[should_panic(expected = "reentrant init")] -fn reentrant_init() { - let x: OnceCell<Box<i32>> = OnceCell::new(); - let dangling_ref: Cell<Option<&i32>> = Cell::new(None); - x.get_or_init(|| { - let r = x.get_or_init(|| Box::new(92)); - dangling_ref.set(Some(r)); - Box::new(62) - }); - eprintln!("use after free: {:?}", dangling_ref.get().unwrap()); -} - -#[test] -fn aliasing_in_get() { - let x = OnceCell::new(); - x.set(42).unwrap(); - let at_x = x.get().unwrap(); // --- (shared) borrow of inner `Option<T>` --+ - let _ = x.set(27); // <-- temporary (unique) borrow of inner `Option<T>` | - println!("{}", at_x); // <------- up until here ---------------------------+ -} - -#[test] -// https://github.com/rust-lang/rust/issues/34761#issuecomment-256320669 -fn arrrrrrrrrrrrrrrrrrrrrr() { - let cell = OnceCell::new(); - { - let s = String::new(); - cell.set(&s).unwrap(); - } -} |