mod owning_ref {
use super::super::OwningRef;
use super::super::{RcRef, BoxRef, Erased, ErasedBoxRef};
use std::cmp::{PartialEq, Ord, PartialOrd, Ordering};
use std::hash::{Hash, Hasher};
use std::collections::hash_map::DefaultHasher;
use std::collections::HashMap;
use std::rc::Rc;
#[derive(Debug, PartialEq)]
struct Example(u32, String, [u8; 3]);
fn example() -> Example {
Example(42, "hello world".to_string(), [1, 2, 3])
}
#[test]
fn new_deref() {
let or: OwningRef<Box<()>, ()> = OwningRef::new(Box::new(()));
assert_eq!(&*or, &());
}
#[test]
fn into() {
let or: OwningRef<Box<()>, ()> = Box::new(()).into();
assert_eq!(&*or, &());
}
#[test]
fn map_offset_ref() {
let or: BoxRef<Example> = Box::new(example()).into();
let or: BoxRef<_, u32> = or.map(|x| &x.0);
assert_eq!(&*or, &42);
let or: BoxRef<Example> = Box::new(example()).into();
let or: BoxRef<_, u8> = or.map(|x| &x.2[1]);
assert_eq!(&*or, &2);
}
#[test]
fn map_heap_ref() {
let or: BoxRef<Example> = Box::new(example()).into();
let or: BoxRef<_, str> = or.map(|x| &x.1[..5]);
assert_eq!(&*or, "hello");
}
#[test]
fn map_static_ref() {
let or: BoxRef<()> = Box::new(()).into();
let or: BoxRef<_, str> = or.map(|_| "hello");
assert_eq!(&*or, "hello");
}
#[test]
fn map_chained() {
let or: BoxRef<String> = Box::new(example().1).into();
let or: BoxRef<_, str> = or.map(|x| &x[1..5]);
let or: BoxRef<_, str> = or.map(|x| &x[..2]);
assert_eq!(&*or, "el");
}
#[test]
fn map_chained_inference() {
let or = BoxRef::new(Box::new(example().1))
.map(|x| &x[..5])
.map(|x| &x[1..3]);
assert_eq!(&*or, "el");
}
#[test]
fn owner() {
let or: BoxRef<String> = Box::new(example().1).into();
let or = or.map(|x| &x[..5]);
assert_eq!(&*or, "hello");
assert_eq!(&**or.owner(), "hello world");
}
#[test]
fn into_inner() {
let or: BoxRef<String> = Box::new(example().1).into();
let or = or.map(|x| &x[..5]);
assert_eq!(&*or, "hello");
let s = *or.into_inner();
assert_eq!(&s, "hello world");
}
#[test]
fn fmt_debug() {
let or: BoxRef<String> = Box::new(example().1).into();
let or = or.map(|x| &x[..5]);
let s = format!("{:?}", or);
assert_eq!(&s, "OwningRef { owner: \"hello world\", reference: \"hello\" }");
}
#[test]
fn erased_owner() {
let o1: BoxRef<Example, str> = BoxRef::new(Box::new(example()))
.map(|x| &x.1[..]);
let o2: BoxRef<String, str> = BoxRef::new(Box::new(example().1))
.map(|x| &x[..]);
let os: Vec<ErasedBoxRef<str>> = vec![o1.erase_owner(), o2.erase_owner()];
assert!(os.iter().all(|e| &e[..] == "hello world"));
}
#[test]
fn raii_locks() {
use super::super::{RefRef, RefMutRef};
use std::cell::RefCell;
use super::super::{MutexGuardRef, RwLockReadGuardRef, RwLockWriteGuardRef};
use std::sync::{Mutex, RwLock};
{
let a = RefCell::new(1);
let a = {
let a = RefRef::new(a.borrow());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = RefCell::new(1);
let a = {
let a = RefMutRef::new(a.borrow_mut());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = Mutex::new(1);
let a = {
let a = MutexGuardRef::new(a.lock().unwrap());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = RwLock::new(1);
let a = {
let a = RwLockReadGuardRef::new(a.read().unwrap());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = RwLock::new(1);
let a = {
let a = RwLockWriteGuardRef::new(a.write().unwrap());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
}
#[test]
fn eq() {
let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
assert_eq!(or1.eq(&or2), true);
}
#[test]
fn cmp() {
let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRef<[u8]> = BoxRef::new(vec![4, 5, 6].into_boxed_slice());
assert_eq!(or1.cmp(&or2), Ordering::Less);
}
#[test]
fn partial_cmp() {
let or1: BoxRef<[u8]> = BoxRef::new(vec![4, 5, 6].into_boxed_slice());
let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
assert_eq!(or1.partial_cmp(&or2), Some(Ordering::Greater));
}
#[test]
fn hash() {
let mut h1 = DefaultHasher::new();
let mut h2 = DefaultHasher::new();
let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
or1.hash(&mut h1);
or2.hash(&mut h2);
assert_eq!(h1.finish(), h2.finish());
}
#[test]
fn borrow() {
let mut hash = HashMap::new();
let key = RcRef::<String>::new(Rc::new("foo-bar".to_string())).map(|s| &s[..]);
hash.insert(key.clone().map(|s| &s[..3]), 42);
hash.insert(key.clone().map(|s| &s[4..]), 23);
assert_eq!(hash.get("foo"), Some(&42));
assert_eq!(hash.get("bar"), Some(&23));
}
#[test]
fn total_erase() {
let a: OwningRef<Vec<u8>, [u8]>
= OwningRef::new(vec![]).map(|x| &x[..]);
let b: OwningRef<Box<[u8]>, [u8]>
= OwningRef::new(vec![].into_boxed_slice()).map(|x| &x[..]);
let c: OwningRef<Rc<Vec<u8>>, [u8]> = unsafe {a.map_owner(Rc::new)};
let d: OwningRef<Rc<Box<[u8]>>, [u8]> = unsafe {b.map_owner(Rc::new)};
let e: OwningRef<Rc<dyn Erased>, [u8]> = c.erase_owner();
let f: OwningRef<Rc<dyn Erased>, [u8]> = d.erase_owner();
let _g = e.clone();
let _h = f.clone();
}
#[test]
fn total_erase_box() {
let a: OwningRef<Vec<u8>, [u8]>
= OwningRef::new(vec![]).map(|x| &x[..]);
let b: OwningRef<Box<[u8]>, [u8]>
= OwningRef::new(vec![].into_boxed_slice()).map(|x| &x[..]);
let c: OwningRef<Box<Vec<u8>>, [u8]> = a.map_owner_box();
let d: OwningRef<Box<Box<[u8]>>, [u8]> = b.map_owner_box();
let _e: OwningRef<Box<dyn Erased>, [u8]> = c.erase_owner();
let _f: OwningRef<Box<dyn Erased>, [u8]> = d.erase_owner();
}
#[test]
fn try_map1() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(OwningRef::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_ok());
}
#[test]
fn try_map2() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(!OwningRef::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_err());
}
}
mod owning_handle {
use super::super::OwningHandle;
use super::super::RcRef;
use std::rc::Rc;
use std::cell::RefCell;
use std::sync::Arc;
use std::sync::RwLock;
#[test]
fn owning_handle() {
use std::cell::RefCell;
let cell = Rc::new(RefCell::new(2));
let cell_ref = RcRef::new(cell);
let mut handle = OwningHandle::new_with_fn(cell_ref, |x| {
unsafe { x.as_ref() }.unwrap().borrow_mut()
});
assert_eq!(*handle, 2);
*handle = 3;
assert_eq!(*handle, 3);
}
#[test]
fn try_owning_handle_ok() {
use std::cell::RefCell;
let cell = Rc::new(RefCell::new(2));
let cell_ref = RcRef::new(cell);
let mut handle = OwningHandle::try_new::<_, ()>(cell_ref, |x| {
Ok(unsafe {
x.as_ref()
}.unwrap().borrow_mut())
}).unwrap();
assert_eq!(*handle, 2);
*handle = 3;
assert_eq!(*handle, 3);
}
#[test]
fn try_owning_handle_err() {
use std::cell::RefCell;
let cell = Rc::new(RefCell::new(2));
let cell_ref = RcRef::new(cell);
let handle = OwningHandle::try_new::<_, ()>(cell_ref, |x| {
if false {
return Ok(unsafe {
x.as_ref()
}.unwrap().borrow_mut())
}
Err(())
});
assert!(handle.is_err());
}
#[test]
fn nested() {
use std::cell::RefCell;
use std::sync::{Arc, RwLock};
let result = {
let complex = Rc::new(RefCell::new(Arc::new(RwLock::new("someString"))));
let curr = RcRef::new(complex);
let curr = OwningHandle::new_with_fn(curr, |x| {
unsafe { x.as_ref() }.unwrap().borrow_mut()
});
let mut curr = OwningHandle::new_with_fn(curr, |x| {
unsafe { x.as_ref() }.unwrap().try_write().unwrap()
});
assert_eq!(*curr, "someString");
*curr = "someOtherString";
curr
};
assert_eq!(*result, "someOtherString");
}
#[test]
fn owning_handle_safe() {
use std::cell::RefCell;
let cell = Rc::new(RefCell::new(2));
let cell_ref = RcRef::new(cell);
let handle = OwningHandle::new(cell_ref);
assert_eq!(*handle, 2);
}
#[test]
fn owning_handle_mut_safe() {
use std::cell::RefCell;
let cell = Rc::new(RefCell::new(2));
let cell_ref = RcRef::new(cell);
let mut handle = OwningHandle::new_mut(cell_ref);
assert_eq!(*handle, 2);
*handle = 3;
assert_eq!(*handle, 3);
}
#[test]
fn owning_handle_safe_2() {
let result = {
let complex = Rc::new(RefCell::new(Arc::new(RwLock::new("someString"))));
let curr = RcRef::new(complex);
let curr = OwningHandle::new_with_fn(curr, |x| {
unsafe { x.as_ref() }.unwrap().borrow_mut()
});
let mut curr = OwningHandle::new_with_fn(curr, |x| {
unsafe { x.as_ref() }.unwrap().try_write().unwrap()
});
assert_eq!(*curr, "someString");
*curr = "someOtherString";
curr
};
assert_eq!(*result, "someOtherString");
}
}
mod owning_ref_mut {
use super::super::{OwningRefMut, BoxRefMut, Erased, ErasedBoxRefMut};
use super::super::BoxRef;
use std::cmp::{PartialEq, Ord, PartialOrd, Ordering};
use std::hash::{Hash, Hasher};
use std::collections::hash_map::DefaultHasher;
use std::collections::HashMap;
#[derive(Debug, PartialEq)]
struct Example(u32, String, [u8; 3]);
fn example() -> Example {
Example(42, "hello world".to_string(), [1, 2, 3])
}
#[test]
fn new_deref() {
let or: OwningRefMut<Box<()>, ()> = OwningRefMut::new(Box::new(()));
assert_eq!(&*or, &());
}
#[test]
fn new_deref_mut() {
let mut or: OwningRefMut<Box<()>, ()> = OwningRefMut::new(Box::new(()));
assert_eq!(&mut *or, &mut ());
}
#[test]
fn mutate() {
let mut or: OwningRefMut<Box<usize>, usize> = OwningRefMut::new(Box::new(0));
assert_eq!(&*or, &0);
*or = 1;
assert_eq!(&*or, &1);
}
#[test]
fn into() {
let or: OwningRefMut<Box<()>, ()> = Box::new(()).into();
assert_eq!(&*or, &());
}
#[test]
fn map_offset_ref() {
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRef<_, u32> = or.map(|x| &mut x.0);
assert_eq!(&*or, &42);
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRef<_, u8> = or.map(|x| &mut x.2[1]);
assert_eq!(&*or, &2);
}
#[test]
fn map_heap_ref() {
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRef<_, str> = or.map(|x| &mut x.1[..5]);
assert_eq!(&*or, "hello");
}
#[test]
fn map_static_ref() {
let or: BoxRefMut<()> = Box::new(()).into();
let or: BoxRef<_, str> = or.map(|_| "hello");
assert_eq!(&*or, "hello");
}
#[test]
fn map_mut_offset_ref() {
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRefMut<_, u32> = or.map_mut(|x| &mut x.0);
assert_eq!(&*or, &42);
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRefMut<_, u8> = or.map_mut(|x| &mut x.2[1]);
assert_eq!(&*or, &2);
}
#[test]
fn map_mut_heap_ref() {
let or: BoxRefMut<Example> = Box::new(example()).into();
let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x.1[..5]);
assert_eq!(&*or, "hello");
}
#[test]
fn map_mut_static_ref() {
static mut MUT_S: [u8; 5] = *b"hello";
let mut_s: &'static mut [u8] = unsafe { &mut MUT_S };
let or: BoxRefMut<()> = Box::new(()).into();
let or: BoxRefMut<_, [u8]> = or.map_mut(move |_| mut_s);
assert_eq!(&*or, b"hello");
}
#[test]
fn map_mut_chained() {
let or: BoxRefMut<String> = Box::new(example().1).into();
let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x[1..5]);
let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x[..2]);
assert_eq!(&*or, "el");
}
#[test]
fn map_chained_inference() {
let or = BoxRefMut::new(Box::new(example().1))
.map_mut(|x| &mut x[..5])
.map_mut(|x| &mut x[1..3]);
assert_eq!(&*or, "el");
}
#[test]
fn try_map_mut() {
let or: BoxRefMut<String> = Box::new(example().1).into();
let or: Result<BoxRefMut<_, str>, ()> = or.try_map_mut(|x| Ok(&mut x[1..5]));
assert_eq!(&*or.unwrap(), "ello");
let or: BoxRefMut<String> = Box::new(example().1).into();
let or: Result<BoxRefMut<_, str>, ()> = or.try_map_mut(|_| Err(()));
assert!(or.is_err());
}
#[test]
fn owner() {
let or: BoxRefMut<String> = Box::new(example().1).into();
let or = or.map_mut(|x| &mut x[..5]);
assert_eq!(&*or, "hello");
assert_eq!(&**or.owner(), "hello world");
}
#[test]
fn into_inner() {
let or: BoxRefMut<String> = Box::new(example().1).into();
let or = or.map_mut(|x| &mut x[..5]);
assert_eq!(&*or, "hello");
let s = *or.into_inner();
assert_eq!(&s, "hello world");
}
#[test]
fn fmt_debug() {
let or: BoxRefMut<String> = Box::new(example().1).into();
let or = or.map_mut(|x| &mut x[..5]);
let s = format!("{:?}", or);
assert_eq!(&s,
"OwningRefMut { owner: \"hello world\", reference: \"hello\" }");
}
#[test]
fn erased_owner() {
let o1: BoxRefMut<Example, str> = BoxRefMut::new(Box::new(example()))
.map_mut(|x| &mut x.1[..]);
let o2: BoxRefMut<String, str> = BoxRefMut::new(Box::new(example().1))
.map_mut(|x| &mut x[..]);
let os: Vec<ErasedBoxRefMut<str>> = vec![o1.erase_owner(), o2.erase_owner()];
assert!(os.iter().all(|e| &e[..] == "hello world"));
}
#[test]
fn raii_locks() {
use super::super::RefMutRefMut;
use std::cell::RefCell;
use super::super::{MutexGuardRefMut, RwLockWriteGuardRefMut};
use std::sync::{Mutex, RwLock};
{
let a = RefCell::new(1);
let a = {
let a = RefMutRefMut::new(a.borrow_mut());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = Mutex::new(1);
let a = {
let a = MutexGuardRefMut::new(a.lock().unwrap());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
{
let a = RwLock::new(1);
let a = {
let a = RwLockWriteGuardRefMut::new(a.write().unwrap());
assert_eq!(*a, 1);
a
};
assert_eq!(*a, 1);
drop(a);
}
}
#[test]
fn eq() {
let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
assert_eq!(or1.eq(&or2), true);
}
#[test]
fn cmp() {
let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![4, 5, 6].into_boxed_slice());
assert_eq!(or1.cmp(&or2), Ordering::Less);
}
#[test]
fn partial_cmp() {
let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![4, 5, 6].into_boxed_slice());
let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
assert_eq!(or1.partial_cmp(&or2), Some(Ordering::Greater));
}
#[test]
fn hash() {
let mut h1 = DefaultHasher::new();
let mut h2 = DefaultHasher::new();
let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
or1.hash(&mut h1);
or2.hash(&mut h2);
assert_eq!(h1.finish(), h2.finish());
}
#[test]
fn borrow() {
let mut hash = HashMap::new();
let key1 = BoxRefMut::<String>::new(Box::new("foo".to_string())).map(|s| &s[..]);
let key2 = BoxRefMut::<String>::new(Box::new("bar".to_string())).map(|s| &s[..]);
hash.insert(key1, 42);
hash.insert(key2, 23);
assert_eq!(hash.get("foo"), Some(&42));
assert_eq!(hash.get("bar"), Some(&23));
}
#[test]
fn total_erase() {
let a: OwningRefMut<Vec<u8>, [u8]>
= OwningRefMut::new(vec![]).map_mut(|x| &mut x[..]);
let b: OwningRefMut<Box<[u8]>, [u8]>
= OwningRefMut::new(vec![].into_boxed_slice()).map_mut(|x| &mut x[..]);
let c: OwningRefMut<Box<Vec<u8>>, [u8]> = unsafe {a.map_owner(Box::new)};
let d: OwningRefMut<Box<Box<[u8]>>, [u8]> = unsafe {b.map_owner(Box::new)};
let _e: OwningRefMut<Box<dyn Erased>, [u8]> = c.erase_owner();
let _f: OwningRefMut<Box<dyn Erased>, [u8]> = d.erase_owner();
}
#[test]
fn total_erase_box() {
let a: OwningRefMut<Vec<u8>, [u8]>
= OwningRefMut::new(vec![]).map_mut(|x| &mut x[..]);
let b: OwningRefMut<Box<[u8]>, [u8]>
= OwningRefMut::new(vec![].into_boxed_slice()).map_mut(|x| &mut x[..]);
let c: OwningRefMut<Box<Vec<u8>>, [u8]> = a.map_owner_box();
let d: OwningRefMut<Box<Box<[u8]>>, [u8]> = b.map_owner_box();
let _e: OwningRefMut<Box<dyn Erased>, [u8]> = c.erase_owner();
let _f: OwningRefMut<Box<dyn Erased>, [u8]> = d.erase_owner();
}
#[test]
fn try_map1() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(OwningRefMut::new(y).try_map_mut(|x| x.downcast_mut::<i32>().ok_or(())).is_ok());
}
#[test]
fn try_map2() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(!OwningRefMut::new(y).try_map_mut(|x| x.downcast_mut::<i32>().ok_or(())).is_err());
}
#[test]
fn try_map3() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(OwningRefMut::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_ok());
}
#[test]
fn try_map4() {
use std::any::Any;
let x = Box::new(123_i32);
let y: Box<dyn Any> = x;
assert!(!OwningRefMut::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_err());
}
#[test]
fn into_owning_ref() {
use super::super::BoxRef;
let or: BoxRefMut<()> = Box::new(()).into();
let or: BoxRef<()> = or.into();
assert_eq!(&*or, &());
}
struct Foo {
u: u32,
}
struct Bar {
f: Foo,
}
#[test]
fn ref_mut() {
use std::cell::RefCell;
let a = RefCell::new(Bar { f: Foo { u: 42 } });
let mut b = OwningRefMut::new(a.borrow_mut());
assert_eq!(b.f.u, 42);
b.f.u = 43;
let mut c = b.map_mut(|x| &mut x.f);
assert_eq!(c.u, 43);
c.u = 44;
let mut d = c.map_mut(|x| &mut x.u);
assert_eq!(*d, 44);
*d = 45;
assert_eq!(*d, 45);
}
}