1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
use crate::io::prelude::*;
use crate::io::{empty, repeat, sink, BorrowedBuf, Empty, Repeat, SeekFrom, Sink};
use crate::mem::MaybeUninit;
#[test]
fn sink_sinks() {
let mut s = sink();
assert_eq!(s.write(&[]).unwrap(), 0);
assert_eq!(s.write(&[0]).unwrap(), 1);
assert_eq!(s.write(&[0; 1024]).unwrap(), 1024);
assert_eq!(s.by_ref().write(&[0; 1024]).unwrap(), 1024);
}
#[test]
fn empty_reads() {
let mut e = empty();
assert_eq!(e.read(&mut []).unwrap(), 0);
assert_eq!(e.read(&mut [0]).unwrap(), 0);
assert_eq!(e.read(&mut [0; 1024]).unwrap(), 0);
assert_eq!(e.by_ref().read(&mut [0; 1024]).unwrap(), 0);
let buf: &mut [MaybeUninit<_>] = &mut [];
let mut buf: BorrowedBuf<'_> = buf.into();
e.read_buf(buf.unfilled()).unwrap();
assert_eq!(buf.len(), 0);
assert_eq!(buf.init_len(), 0);
let buf: &mut [_] = &mut [MaybeUninit::uninit()];
let mut buf: BorrowedBuf<'_> = buf.into();
e.read_buf(buf.unfilled()).unwrap();
assert_eq!(buf.len(), 0);
assert_eq!(buf.init_len(), 0);
let buf: &mut [_] = &mut [MaybeUninit::uninit(); 1024];
let mut buf: BorrowedBuf<'_> = buf.into();
e.read_buf(buf.unfilled()).unwrap();
assert_eq!(buf.len(), 0);
assert_eq!(buf.init_len(), 0);
let buf: &mut [_] = &mut [MaybeUninit::uninit(); 1024];
let mut buf: BorrowedBuf<'_> = buf.into();
e.by_ref().read_buf(buf.unfilled()).unwrap();
assert_eq!(buf.len(), 0);
assert_eq!(buf.init_len(), 0);
}
#[test]
fn empty_seeks() {
let mut e = empty();
assert!(matches!(e.seek(SeekFrom::Start(0)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Start(1)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Start(u64::MAX)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::End(i64::MIN)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::End(-1)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::End(0)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::End(1)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::End(i64::MAX)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Current(i64::MIN)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Current(-1)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Current(0)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Current(1)), Ok(0)));
assert!(matches!(e.seek(SeekFrom::Current(i64::MAX)), Ok(0)));
}
#[test]
fn repeat_repeats() {
let mut r = repeat(4);
let mut b = [0; 1024];
assert_eq!(r.read(&mut b).unwrap(), 1024);
assert!(b.iter().all(|b| *b == 4));
}
#[test]
fn take_some_bytes() {
assert_eq!(repeat(4).take(100).bytes().count(), 100);
assert_eq!(repeat(4).take(100).bytes().next().unwrap().unwrap(), 4);
assert_eq!(repeat(1).take(10).chain(repeat(2).take(10)).bytes().count(), 20);
}
#[allow(dead_code)]
fn const_utils() {
const _: Empty = empty();
const _: Repeat = repeat(b'c');
const _: Sink = sink();
}
|
