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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
#![crate_name="mockstream"]
#![crate_type="lib"]
use std::rc::{Rc};
use std::cell::{RefCell};
use std::io::{Cursor, Read, Write, Result, Error, ErrorKind};
use std::mem::swap;
use std::sync::{Arc, Mutex};
#[cfg(test)]
mod tests;
#[derive(Clone)]
pub struct MockStream {
reader: Cursor<Vec<u8>>,
writer: Cursor<Vec<u8>>,
}
impl Default for MockStream {
fn default() -> Self {
MockStream::new()
}
}
fn new_cursor() -> Cursor<Vec<u8>> {
Cursor::new(Vec::new())
}
impl MockStream {
pub fn new() -> MockStream {
MockStream {
reader: new_cursor(),
writer: new_cursor(),
}
}
pub fn pop_bytes_written(&mut self) -> Vec<u8> {
let mut result = Vec::new();
swap(&mut result, self.writer.get_mut());
self.writer.set_position(0);
result
}
pub fn push_bytes_to_read(&mut self, bytes: &[u8]) {
let avail = self.reader.get_ref().len();
if self.reader.position() == avail as u64 {
self.reader = new_cursor();
}
self.reader.get_mut().extend(bytes.iter().map(|c| *c));
}
}
impl Read for MockStream {
fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
self.reader.read(buf)
}
}
impl Write for MockStream {
fn write<'a>(&mut self, buf: &'a [u8]) -> Result<usize> {
self.writer.write(buf)
}
fn flush(&mut self) -> Result<()> {
self.writer.flush()
}
}
#[derive(Clone, Default)]
pub struct SharedMockStream {
pimpl: Rc<RefCell<MockStream>>
}
impl SharedMockStream {
pub fn new() -> SharedMockStream {
SharedMockStream::default()
}
pub fn push_bytes_to_read(&mut self, bytes: &[u8]) {
self.pimpl.borrow_mut().push_bytes_to_read(bytes)
}
pub fn pop_bytes_written(&mut self) -> Vec<u8> {
self.pimpl.borrow_mut().pop_bytes_written()
}
}
impl Read for SharedMockStream {
fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
self.pimpl.borrow_mut().read(buf)
}
}
impl Write for SharedMockStream {
fn write(&mut self, buf: &[u8]) -> Result<usize> {
self.pimpl.borrow_mut().write(buf)
}
fn flush(&mut self) -> Result<()> {
self.pimpl.borrow_mut().flush()
}
}
#[derive(Clone, Default)]
pub struct SyncMockStream {
pimpl: Arc<Mutex<MockStream>>
}
impl SyncMockStream {
pub fn new() -> SyncMockStream {
SyncMockStream::default()
}
pub fn push_bytes_to_read(&mut self, bytes: &[u8]) {
self.pimpl.lock().unwrap().push_bytes_to_read(bytes)
}
pub fn pop_bytes_written(&mut self) -> Vec<u8> {
self.pimpl.lock().unwrap().pop_bytes_written()
}
}
impl Read for SyncMockStream {
fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
self.pimpl.lock().unwrap().read(buf)
}
}
impl Write for SyncMockStream {
fn write(&mut self, buf: &[u8]) -> Result<usize> {
self.pimpl.lock().unwrap().write(buf)
}
fn flush(&mut self) -> Result<()> {
self.pimpl.lock().unwrap().flush()
}
}
#[derive(Clone)]
pub struct FailingMockStream {
kind: ErrorKind,
message: &'static str,
repeat_count: i32,
}
impl FailingMockStream {
pub fn new(kind: ErrorKind, message: &'static str, repeat_count: i32) -> FailingMockStream {
FailingMockStream { kind: kind, message: message, repeat_count: repeat_count, }
}
fn error(&mut self) -> Result<usize> {
if self.repeat_count == 0 {
return Ok(0)
}
else {
if self.repeat_count > 0 {
self.repeat_count -= 1;
}
Err(Error::new(self.kind, self.message))
}
}
}
impl Read for FailingMockStream {
fn read(&mut self, _: &mut [u8]) -> Result<usize> {
self.error()
}
}
impl Write for FailingMockStream {
fn write(&mut self, _: &[u8]) -> Result<usize> {
self.error()
}
fn flush(&mut self) -> Result<()> {
Ok(())
}
}