mock_io/mock_listener/
sync.rs

1use std::sync::mpsc::{channel, Receiver, Sender};
2
3use crate::{error::Error, sync::MockStream};
4
5#[derive(Debug)]
6/// Synchronous mock IO listener
7pub struct MockListener {
8    receiver: Receiver<MockStream>,
9}
10
11impl MockListener {
12    /// Creates a new synchronous mock listener
13    pub fn new() -> (Self, Handle) {
14        let (sender, receiver) = channel();
15
16        (Self { receiver }, Handle { sender })
17    }
18
19    /// Accept a new connection. Returns a mock stream supplied by the sender
20    pub fn accept(&self) -> Result<MockStream, Error> {
21        self.receiver.recv().map_err(Into::into)
22    }
23}
24
25/// Handle for synchronous mock IO listener used to connect to the listener
26pub struct Handle {
27    sender: Sender<MockStream>,
28}
29
30impl Handle {
31    pub(crate) fn send(&self, mock_stream: MockStream) -> Result<(), Error> {
32        self.sender.send(mock_stream).map_err(Into::into)
33    }
34}
35
36#[cfg(test)]
37mod tests {
38    use super::*;
39
40    use std::{
41        io::{Read, Write},
42        thread,
43    };
44
45    #[test]
46    fn check_listener_flow() {
47        let (listener, handle) = MockListener::new();
48
49        thread::spawn(move || {
50            let mut stream = MockStream::connect(&handle).unwrap();
51            stream.write(&1u64.to_be_bytes()).unwrap();
52            stream.write(&2u64.to_be_bytes()).unwrap();
53        });
54
55        while let Ok(mut stream) = listener.accept() {
56            let mut buf = [0; 8];
57
58            stream.read(&mut buf).unwrap();
59            assert_eq!(1u64.to_be_bytes(), buf);
60
61            stream.read(&mut buf).unwrap();
62            assert_eq!(2u64.to_be_bytes(), buf);
63        }
64    }
65}
mock_io/mock_listener/sync.rs

mock_io/mock_listener/
sync.rs
