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5717d99d
编写于
7月 06, 2018
作者:
S
Simon Sapin
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电子邮件补丁
差异文件
Add some unit tests for dangling Weak references
上级
21526c54
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
112 addition
and
0 deletion
+112
-0
src/liballoc/tests/arc.rs
src/liballoc/tests/arc.rs
+55
-0
src/liballoc/tests/lib.rs
src/liballoc/tests/lib.rs
+2
-0
src/liballoc/tests/rc.rs
src/liballoc/tests/rc.rs
+55
-0
未找到文件。
src/liballoc/tests/arc.rs
0 → 100644
浏览文件 @
5717d99d
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use
std
::
any
::
Any
;
use
std
::
sync
::{
Arc
,
Weak
};
#[test]
fn
uninhabited
()
{
enum
Void
{}
let
mut
a
=
Weak
::
<
Void
>
::
new
();
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_none
());
let
mut
a
:
Weak
<
Any
>
=
a
;
// Unsizing
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_none
());
}
#[test]
fn
slice
()
{
let
a
:
Arc
<
[
u32
;
3
]
>
=
Arc
::
new
([
3
,
2
,
1
]);
let
a
:
Arc
<
[
u32
]
>
=
a
;
// Unsizing
let
b
:
Arc
<
[
u32
]
>
=
Arc
::
from
(
&
[
3
,
2
,
1
][
..
]);
// Conversion
assert_eq!
(
a
,
b
);
// Exercise is_dangling() with a DST
let
mut
a
=
Arc
::
downgrade
(
&
a
);
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_some
());
}
#[test]
fn
trait_object
()
{
let
a
:
Arc
<
u32
>
=
Arc
::
new
(
4
);
let
a
:
Arc
<
Any
>
=
a
;
// Unsizing
// Exercise is_dangling() with a DST
let
mut
a
=
Arc
::
downgrade
(
&
a
);
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_some
());
let
mut
b
=
Weak
::
<
u32
>
::
new
();
b
=
b
.clone
();
assert
!
(
b
.upgrade
()
.is_none
());
let
mut
b
:
Weak
<
Any
>
=
b
;
// Unsizing
b
=
b
.clone
();
assert
!
(
b
.upgrade
()
.is_none
());
}
src/liballoc/tests/lib.rs
浏览文件 @
5717d99d
...
...
@@ -32,12 +32,14 @@
use
std
::
hash
::{
Hash
,
Hasher
};
use
std
::
collections
::
hash_map
::
DefaultHasher
;
mod
arc
;
mod
binary_heap
;
mod
btree
;
mod
cow_str
;
mod
fmt
;
mod
heap
;
mod
linked_list
;
mod
rc
;
mod
slice
;
mod
str
;
mod
string
;
...
...
src/liballoc/tests/rc.rs
0 → 100644
浏览文件 @
5717d99d
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use
std
::
any
::
Any
;
use
std
::
rc
::{
Rc
,
Weak
};
#[test]
fn
uninhabited
()
{
enum
Void
{}
let
mut
a
=
Weak
::
<
Void
>
::
new
();
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_none
());
let
mut
a
:
Weak
<
Any
>
=
a
;
// Unsizing
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_none
());
}
#[test]
fn
slice
()
{
let
a
:
Rc
<
[
u32
;
3
]
>
=
Rc
::
new
([
3
,
2
,
1
]);
let
a
:
Rc
<
[
u32
]
>
=
a
;
// Unsizing
let
b
:
Rc
<
[
u32
]
>
=
Rc
::
from
(
&
[
3
,
2
,
1
][
..
]);
// Conversion
assert_eq!
(
a
,
b
);
// Exercise is_dangling() with a DST
let
mut
a
=
Rc
::
downgrade
(
&
a
);
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_some
());
}
#[test]
fn
trait_object
()
{
let
a
:
Rc
<
u32
>
=
Rc
::
new
(
4
);
let
a
:
Rc
<
Any
>
=
a
;
// Unsizing
// Exercise is_dangling() with a DST
let
mut
a
=
Rc
::
downgrade
(
&
a
);
a
=
a
.clone
();
assert
!
(
a
.upgrade
()
.is_some
());
let
mut
b
=
Weak
::
<
u32
>
::
new
();
b
=
b
.clone
();
assert
!
(
b
.upgrade
()
.is_none
());
let
mut
b
:
Weak
<
Any
>
=
b
;
// Unsizing
b
=
b
.clone
();
assert
!
(
b
.upgrade
()
.is_none
());
}
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