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Add tests for weak into/from raw

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This commit is contained in:
CAD97 2020-07-14 15:35:14 -04:00
parent 9d9903c5a5
commit 3d07108d36
2 changed files with 84 additions and 0 deletions
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42
library/alloc/src/rc/tests.rs
View File

@ -190,6 +190,48 @@ fn test_into_from_raw_unsized() {
assert_eq!(rc2.to_string(), "123");
}
#[test]
fn into_from_weak_raw() {
let x = Rc::new(box "hello");
let y = Rc::downgrade(&x);
let y_ptr = Weak::into_raw(y);
unsafe {
assert_eq!(**y_ptr, "hello");
let y = Weak::from_raw(y_ptr);
let y_up = Weak::upgrade(&y).unwrap();
assert_eq!(**y_up, "hello");
drop(y_up);
assert_eq!(Rc::try_unwrap(x).map(|x| *x), Ok("hello"));
}
}
#[test]
fn test_into_from_weak_raw_unsized() {
use std::fmt::Display;
use std::string::ToString;
let arc: Rc<str> = Rc::from("foo");
let weak: Weak<str> = Rc::downgrade(&arc);
let ptr = Weak::into_raw(weak.clone());
let weak2 = unsafe { Weak::from_raw(ptr) };
assert_eq!(unsafe { &*ptr }, "foo");
assert!(weak.ptr_eq(&weak2));
let arc: Rc<dyn Display> = Rc::new(123);
let weak: Weak<dyn Display> = Rc::downgrade(&arc);
let ptr = Weak::into_raw(weak.clone());
let weak2 = unsafe { Weak::from_raw(ptr) };
assert_eq!(unsafe { &*ptr }.to_string(), "123");
assert!(weak.ptr_eq(&weak2));
}
#[test]
fn get_mut() {
let mut x = Rc::new(3);

42
library/alloc/src/sync/tests.rs
View File

@ -140,6 +140,48 @@ fn test_into_from_raw_unsized() {
assert_eq!(arc2.to_string(), "123");
}
#[test]
fn into_from_weak_raw() {
let x = Arc::new(box "hello");
let y = Arc::downgrade(&x);
let y_ptr = Weak::into_raw(y);
unsafe {
assert_eq!(**y_ptr, "hello");
let y = Weak::from_raw(y_ptr);
let y_up = Weak::upgrade(&y).unwrap();
assert_eq!(**y_up, "hello");
drop(y_up);
assert_eq!(Arc::try_unwrap(x).map(|x| *x), Ok("hello"));
}
}
#[test]
fn test_into_from_weak_raw_unsized() {
use std::fmt::Display;
use std::string::ToString;
let arc: Arc<str> = Arc::from("foo");
let weak: Weak<str> = Arc::downgrade(&arc);
let ptr = Weak::into_raw(weak.clone());
let weak2 = unsafe { Weak::from_raw(ptr) };
assert_eq!(unsafe { &*ptr }, "foo");
assert!(weak.ptr_eq(&weak2));
let arc: Arc<dyn Display> = Arc::new(123);
let weak: Weak<dyn Display> = Arc::downgrade(&arc);
let ptr = Weak::into_raw(weak.clone());
let weak2 = unsafe { Weak::from_raw(ptr) };
assert_eq!(unsafe { &*ptr }.to_string(), "123");
assert!(weak.ptr_eq(&weak2));
}
#[test]
fn test_cowarc_clone_make_mut() {
let mut cow0 = Arc::new(75);