| use super::*; |
| |
| use std::boxed::Box; |
| use std::cell::RefCell; |
| use std::option::Option::{self, None, Some}; |
| use std::result::Result::{Err, Ok}; |
| use std::mem::drop; |
| use std::clone::Clone; |
| use std::convert::{From, TryInto}; |
| |
| #[test] |
| fn test_clone() { |
| let x = Rc::new(RefCell::new(5)); |
| let y = x.clone(); |
| *x.borrow_mut() = 20; |
| assert_eq!(*y.borrow(), 20); |
| } |
| |
| #[test] |
| fn test_simple() { |
| let x = Rc::new(5); |
| assert_eq!(*x, 5); |
| } |
| |
| #[test] |
| fn test_simple_clone() { |
| let x = Rc::new(5); |
| let y = x.clone(); |
| assert_eq!(*x, 5); |
| assert_eq!(*y, 5); |
| } |
| |
| #[test] |
| fn test_destructor() { |
| let x: Rc<Box<_>> = Rc::new(box 5); |
| assert_eq!(**x, 5); |
| } |
| |
| #[test] |
| fn test_live() { |
| let x = Rc::new(5); |
| let y = Rc::downgrade(&x); |
| assert!(y.upgrade().is_some()); |
| } |
| |
| #[test] |
| fn test_dead() { |
| let x = Rc::new(5); |
| let y = Rc::downgrade(&x); |
| drop(x); |
| assert!(y.upgrade().is_none()); |
| } |
| |
| #[test] |
| fn weak_self_cyclic() { |
| struct Cycle { |
| x: RefCell<Option<Weak<Cycle>>>, |
| } |
| |
| let a = Rc::new(Cycle { x: RefCell::new(None) }); |
| let b = Rc::downgrade(&a.clone()); |
| *a.x.borrow_mut() = Some(b); |
| |
| // hopefully we don't double-free (or leak)... |
| } |
| |
| #[test] |
| fn is_unique() { |
| let x = Rc::new(3); |
| assert!(Rc::is_unique(&x)); |
| let y = x.clone(); |
| assert!(!Rc::is_unique(&x)); |
| drop(y); |
| assert!(Rc::is_unique(&x)); |
| let w = Rc::downgrade(&x); |
| assert!(!Rc::is_unique(&x)); |
| drop(w); |
| assert!(Rc::is_unique(&x)); |
| } |
| |
| #[test] |
| fn test_strong_count() { |
| let a = Rc::new(0); |
| assert!(Rc::strong_count(&a) == 1); |
| let w = Rc::downgrade(&a); |
| assert!(Rc::strong_count(&a) == 1); |
| let b = w.upgrade().expect("upgrade of live rc failed"); |
| assert!(Rc::strong_count(&b) == 2); |
| assert!(Rc::strong_count(&a) == 2); |
| drop(w); |
| drop(a); |
| assert!(Rc::strong_count(&b) == 1); |
| let c = b.clone(); |
| assert!(Rc::strong_count(&b) == 2); |
| assert!(Rc::strong_count(&c) == 2); |
| } |
| |
| #[test] |
| fn test_weak_count() { |
| let a = Rc::new(0); |
| assert!(Rc::strong_count(&a) == 1); |
| assert!(Rc::weak_count(&a) == 0); |
| let w = Rc::downgrade(&a); |
| assert!(Rc::strong_count(&a) == 1); |
| assert!(Rc::weak_count(&a) == 1); |
| drop(w); |
| assert!(Rc::strong_count(&a) == 1); |
| assert!(Rc::weak_count(&a) == 0); |
| let c = a.clone(); |
| assert!(Rc::strong_count(&a) == 2); |
| assert!(Rc::weak_count(&a) == 0); |
| drop(c); |
| } |
| |
| #[test] |
| fn weak_counts() { |
| assert_eq!(Weak::weak_count(&Weak::<u64>::new()), None); |
| assert_eq!(Weak::strong_count(&Weak::<u64>::new()), 0); |
| |
| let a = Rc::new(0); |
| let w = Rc::downgrade(&a); |
| assert_eq!(Weak::strong_count(&w), 1); |
| assert_eq!(Weak::weak_count(&w), Some(1)); |
| let w2 = w.clone(); |
| assert_eq!(Weak::strong_count(&w), 1); |
| assert_eq!(Weak::weak_count(&w), Some(2)); |
| assert_eq!(Weak::strong_count(&w2), 1); |
| assert_eq!(Weak::weak_count(&w2), Some(2)); |
| drop(w); |
| assert_eq!(Weak::strong_count(&w2), 1); |
| assert_eq!(Weak::weak_count(&w2), Some(1)); |
| let a2 = a.clone(); |
| assert_eq!(Weak::strong_count(&w2), 2); |
| assert_eq!(Weak::weak_count(&w2), Some(1)); |
| drop(a2); |
| drop(a); |
| assert_eq!(Weak::strong_count(&w2), 0); |
| assert_eq!(Weak::weak_count(&w2), Some(1)); |
| drop(w2); |
| } |
| |
| #[test] |
| fn try_unwrap() { |
| let x = Rc::new(3); |
| assert_eq!(Rc::try_unwrap(x), Ok(3)); |
| let x = Rc::new(4); |
| let _y = x.clone(); |
| assert_eq!(Rc::try_unwrap(x), Err(Rc::new(4))); |
| let x = Rc::new(5); |
| let _w = Rc::downgrade(&x); |
| assert_eq!(Rc::try_unwrap(x), Ok(5)); |
| } |
| |
| #[test] |
| fn into_from_raw() { |
| let x = Rc::new(box "hello"); |
| let y = x.clone(); |
| |
| let x_ptr = Rc::into_raw(x); |
| drop(y); |
| unsafe { |
| assert_eq!(**x_ptr, "hello"); |
| |
| let x = Rc::from_raw(x_ptr); |
| assert_eq!(**x, "hello"); |
| |
| assert_eq!(Rc::try_unwrap(x).map(|x| *x), Ok("hello")); |
| } |
| } |
| |
| #[test] |
| fn test_into_from_raw_unsized() { |
| use std::fmt::Display; |
| use std::string::ToString; |
| |
| let rc: Rc<str> = Rc::from("foo"); |
| |
| let ptr = Rc::into_raw(rc.clone()); |
| let rc2 = unsafe { Rc::from_raw(ptr) }; |
| |
| assert_eq!(unsafe { &*ptr }, "foo"); |
| assert_eq!(rc, rc2); |
| |
| let rc: Rc<dyn Display> = Rc::new(123); |
| |
| let ptr = Rc::into_raw(rc.clone()); |
| let rc2 = unsafe { Rc::from_raw(ptr) }; |
| |
| assert_eq!(unsafe { &*ptr }.to_string(), "123"); |
| assert_eq!(rc2.to_string(), "123"); |
| } |
| |
| #[test] |
| fn get_mut() { |
| let mut x = Rc::new(3); |
| *Rc::get_mut(&mut x).unwrap() = 4; |
| assert_eq!(*x, 4); |
| let y = x.clone(); |
| assert!(Rc::get_mut(&mut x).is_none()); |
| drop(y); |
| assert!(Rc::get_mut(&mut x).is_some()); |
| let _w = Rc::downgrade(&x); |
| assert!(Rc::get_mut(&mut x).is_none()); |
| } |
| |
| #[test] |
| fn test_cowrc_clone_make_unique() { |
| let mut cow0 = Rc::new(75); |
| let mut cow1 = cow0.clone(); |
| let mut cow2 = cow1.clone(); |
| |
| assert!(75 == *Rc::make_mut(&mut cow0)); |
| assert!(75 == *Rc::make_mut(&mut cow1)); |
| assert!(75 == *Rc::make_mut(&mut cow2)); |
| |
| *Rc::make_mut(&mut cow0) += 1; |
| *Rc::make_mut(&mut cow1) += 2; |
| *Rc::make_mut(&mut cow2) += 3; |
| |
| assert!(76 == *cow0); |
| assert!(77 == *cow1); |
| assert!(78 == *cow2); |
| |
| // none should point to the same backing memory |
| assert!(*cow0 != *cow1); |
| assert!(*cow0 != *cow2); |
| assert!(*cow1 != *cow2); |
| } |
| |
| #[test] |
| fn test_cowrc_clone_unique2() { |
| let mut cow0 = Rc::new(75); |
| let cow1 = cow0.clone(); |
| let cow2 = cow1.clone(); |
| |
| assert!(75 == *cow0); |
| assert!(75 == *cow1); |
| assert!(75 == *cow2); |
| |
| *Rc::make_mut(&mut cow0) += 1; |
| |
| assert!(76 == *cow0); |
| assert!(75 == *cow1); |
| assert!(75 == *cow2); |
| |
| // cow1 and cow2 should share the same contents |
| // cow0 should have a unique reference |
| assert!(*cow0 != *cow1); |
| assert!(*cow0 != *cow2); |
| assert!(*cow1 == *cow2); |
| } |
| |
| #[test] |
| fn test_cowrc_clone_weak() { |
| let mut cow0 = Rc::new(75); |
| let cow1_weak = Rc::downgrade(&cow0); |
| |
| assert!(75 == *cow0); |
| assert!(75 == *cow1_weak.upgrade().unwrap()); |
| |
| *Rc::make_mut(&mut cow0) += 1; |
| |
| assert!(76 == *cow0); |
| assert!(cow1_weak.upgrade().is_none()); |
| } |
| |
| #[test] |
| fn test_show() { |
| let foo = Rc::new(75); |
| assert_eq!(format!("{:?}", foo), "75"); |
| } |
| |
| #[test] |
| fn test_unsized() { |
| let foo: Rc<[i32]> = Rc::new([1, 2, 3]); |
| assert_eq!(foo, foo.clone()); |
| } |
| |
| #[test] |
| fn test_from_owned() { |
| let foo = 123; |
| let foo_rc = Rc::from(foo); |
| assert!(123 == *foo_rc); |
| } |
| |
| #[test] |
| fn test_new_weak() { |
| let foo: Weak<usize> = Weak::new(); |
| assert!(foo.upgrade().is_none()); |
| } |
| |
| #[test] |
| fn test_ptr_eq() { |
| let five = Rc::new(5); |
| let same_five = five.clone(); |
| let other_five = Rc::new(5); |
| |
| assert!(Rc::ptr_eq(&five, &same_five)); |
| assert!(!Rc::ptr_eq(&five, &other_five)); |
| } |
| |
| #[test] |
| fn test_from_str() { |
| let r: Rc<str> = Rc::from("foo"); |
| |
| assert_eq!(&r[..], "foo"); |
| } |
| |
| #[test] |
| fn test_copy_from_slice() { |
| let s: &[u32] = &[1, 2, 3]; |
| let r: Rc<[u32]> = Rc::from(s); |
| |
| assert_eq!(&r[..], [1, 2, 3]); |
| } |
| |
| #[test] |
| fn test_clone_from_slice() { |
| #[derive(Clone, Debug, Eq, PartialEq)] |
| struct X(u32); |
| |
| let s: &[X] = &[X(1), X(2), X(3)]; |
| let r: Rc<[X]> = Rc::from(s); |
| |
| assert_eq!(&r[..], s); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_clone_from_slice_panic() { |
| use std::string::{String, ToString}; |
| |
| struct Fail(u32, String); |
| |
| impl Clone for Fail { |
| fn clone(&self) -> Fail { |
| if self.0 == 2 { |
| panic!(); |
| } |
| Fail(self.0, self.1.clone()) |
| } |
| } |
| |
| let s: &[Fail] = &[ |
| Fail(0, "foo".to_string()), |
| Fail(1, "bar".to_string()), |
| Fail(2, "baz".to_string()), |
| ]; |
| |
| // Should panic, but not cause memory corruption |
| let _r: Rc<[Fail]> = Rc::from(s); |
| } |
| |
| #[test] |
| fn test_from_box() { |
| let b: Box<u32> = box 123; |
| let r: Rc<u32> = Rc::from(b); |
| |
| assert_eq!(*r, 123); |
| } |
| |
| #[test] |
| fn test_from_box_str() { |
| use std::string::String; |
| |
| let s = String::from("foo").into_boxed_str(); |
| let r: Rc<str> = Rc::from(s); |
| |
| assert_eq!(&r[..], "foo"); |
| } |
| |
| #[test] |
| fn test_from_box_slice() { |
| let s = vec![1, 2, 3].into_boxed_slice(); |
| let r: Rc<[u32]> = Rc::from(s); |
| |
| assert_eq!(&r[..], [1, 2, 3]); |
| } |
| |
| #[test] |
| fn test_from_box_trait() { |
| use std::fmt::Display; |
| use std::string::ToString; |
| |
| let b: Box<dyn Display> = box 123; |
| let r: Rc<dyn Display> = Rc::from(b); |
| |
| assert_eq!(r.to_string(), "123"); |
| } |
| |
| #[test] |
| fn test_from_box_trait_zero_sized() { |
| use std::fmt::Debug; |
| |
| let b: Box<dyn Debug> = box (); |
| let r: Rc<dyn Debug> = Rc::from(b); |
| |
| assert_eq!(format!("{:?}", r), "()"); |
| } |
| |
| #[test] |
| fn test_from_vec() { |
| let v = vec![1, 2, 3]; |
| let r: Rc<[u32]> = Rc::from(v); |
| |
| assert_eq!(&r[..], [1, 2, 3]); |
| } |
| |
| #[test] |
| fn test_downcast() { |
| use std::any::Any; |
| |
| let r1: Rc<dyn Any> = Rc::new(i32::max_value()); |
| let r2: Rc<dyn Any> = Rc::new("abc"); |
| |
| assert!(r1.clone().downcast::<u32>().is_err()); |
| |
| let r1i32 = r1.downcast::<i32>(); |
| assert!(r1i32.is_ok()); |
| assert_eq!(r1i32.unwrap(), Rc::new(i32::max_value())); |
| |
| assert!(r2.clone().downcast::<i32>().is_err()); |
| |
| let r2str = r2.downcast::<&'static str>(); |
| assert!(r2str.is_ok()); |
| assert_eq!(r2str.unwrap(), Rc::new("abc")); |
| } |
| |
| #[test] |
| fn test_array_from_slice() { |
| let v = vec![1, 2, 3]; |
| let r: Rc<[u32]> = Rc::from(v); |
| |
| let a: Result<Rc<[u32; 3]>, _> = r.clone().try_into(); |
| assert!(a.is_ok()); |
| |
| let a: Result<Rc<[u32; 2]>, _> = r.clone().try_into(); |
| assert!(a.is_err()); |
| } |