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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
#![warn(rust_2018_idioms)]
use std::io;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::time::{Duration, Instant};
use tokio_test::io::Builder;
#[tokio::test]
async fn read() {
let mut mock = Builder::new().read(b"hello ").read(b"world!").build();
let mut buf = [0; 256];
let n = mock.read(&mut buf).await.expect("read 1");
assert_eq!(&buf[..n], b"hello ");
let n = mock.read(&mut buf).await.expect("read 2");
assert_eq!(&buf[..n], b"world!");
}
#[tokio::test]
async fn read_error() {
let error = io::Error::new(io::ErrorKind::Other, "cruel");
let mut mock = Builder::new()
.read(b"hello ")
.read_error(error)
.read(b"world!")
.build();
let mut buf = [0; 256];
let n = mock.read(&mut buf).await.expect("read 1");
assert_eq!(&buf[..n], b"hello ");
match mock.read(&mut buf).await {
Err(error) => {
assert_eq!(error.kind(), io::ErrorKind::Other);
assert_eq!("cruel", format!("{}", error));
}
Ok(_) => panic!("error not received"),
}
let n = mock.read(&mut buf).await.expect("read 1");
assert_eq!(&buf[..n], b"world!");
}
#[tokio::test]
async fn write() {
let mut mock = Builder::new().write(b"hello ").write(b"world!").build();
mock.write_all(b"hello ").await.expect("write 1");
mock.write_all(b"world!").await.expect("write 2");
}
#[tokio::test]
async fn write_with_handle() {
let (mut mock, mut handle) = Builder::new().build_with_handle();
handle.write(b"hello ");
handle.write(b"world!");
mock.write_all(b"hello ").await.expect("write 1");
mock.write_all(b"world!").await.expect("write 2");
}
#[tokio::test]
async fn read_with_handle() {
let (mut mock, mut handle) = Builder::new().build_with_handle();
handle.read(b"hello ");
handle.read(b"world!");
let mut buf = vec![0; 6];
mock.read_exact(&mut buf).await.expect("read 1");
assert_eq!(&buf[..], b"hello ");
mock.read_exact(&mut buf).await.expect("read 2");
assert_eq!(&buf[..], b"world!");
}
#[tokio::test]
async fn write_error() {
let error = io::Error::new(io::ErrorKind::Other, "cruel");
let mut mock = Builder::new()
.write(b"hello ")
.write_error(error)
.write(b"world!")
.build();
mock.write_all(b"hello ").await.expect("write 1");
match mock.write_all(b"whoa").await {
Err(error) => {
assert_eq!(error.kind(), io::ErrorKind::Other);
assert_eq!("cruel", format!("{}", error));
}
Ok(_) => panic!("error not received"),
}
mock.write_all(b"world!").await.expect("write 2");
}
#[tokio::test]
#[should_panic]
async fn mock_panics_read_data_left() {
use tokio_test::io::Builder;
Builder::new().read(b"read").build();
}
#[tokio::test]
#[should_panic]
async fn mock_panics_write_data_left() {
use tokio_test::io::Builder;
Builder::new().write(b"write").build();
}
#[tokio::test(start_paused = true)]
async fn wait() {
const FIRST_WAIT: Duration = Duration::from_secs(1);
let mut mock = Builder::new()
.wait(FIRST_WAIT)
.read(b"hello ")
.read(b"world!")
.build();
let mut buf = [0; 256];
let start = Instant::now(); // record the time the read call takes
//
let n = mock.read(&mut buf).await.expect("read 1");
assert_eq!(&buf[..n], b"hello ");
println!("time elapsed after first read {:?}", start.elapsed());
let n = mock.read(&mut buf).await.expect("read 2");
assert_eq!(&buf[..n], b"world!");
println!("time elapsed after second read {:?}", start.elapsed());
// make sure the .wait() instruction worked
assert!(
start.elapsed() >= FIRST_WAIT,
"consuming the whole mock only took {}ms",
start.elapsed().as_millis()
);
}
#[tokio::test(start_paused = true)]
async fn multiple_wait() {
const FIRST_WAIT: Duration = Duration::from_secs(1);
const SECOND_WAIT: Duration = Duration::from_secs(1);
let mut mock = Builder::new()
.wait(FIRST_WAIT)
.read(b"hello ")
.wait(SECOND_WAIT)
.read(b"world!")
.build();
let mut buf = [0; 256];
let start = Instant::now(); // record the time it takes to consume the mock
let n = mock.read(&mut buf).await.expect("read 1");
assert_eq!(&buf[..n], b"hello ");
println!("time elapsed after first read {:?}", start.elapsed());
let n = mock.read(&mut buf).await.expect("read 2");
assert_eq!(&buf[..n], b"world!");
println!("time elapsed after second read {:?}", start.elapsed());
// make sure the .wait() instruction worked
assert!(
start.elapsed() >= FIRST_WAIT + SECOND_WAIT,
"consuming the whole mock only took {}ms",
start.elapsed().as_millis()
);
}
|
