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-rw-r--r--src/liballoc/rc.rs433
1 files changed, 3 insertions, 430 deletions
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 0d0ff7c16f1..e33aac3af47 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -252,6 +252,9 @@ use crate::alloc::{Global, Alloc, Layout, box_free, handle_alloc_error};
 use crate::string::String;
 use crate::vec::Vec;
 
+#[cfg(test)]
+mod tests;
+
 struct RcBox<T: ?Sized> {
     strong: Cell<usize>,
     weak: Cell<usize>,
@@ -1851,436 +1854,6 @@ impl<T: ?Sized> RcBoxPtr<T> for RcBox<T> {
     }
 }
 
-#[cfg(test)]
-mod tests {
-    use super::{Rc, Weak};
-    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;
-
-    #[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"));
-    }
-}
-
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> borrow::Borrow<T> for Rc<T> {
     fn borrow(&self) -> &T {
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