async-imap 0.11.1

Async IMAP client for Rust
Documentation 
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

use std::cmp::min;
use std::io::{Error, ErrorKind, Result};
use std::pin::Pin;
use std::task::{Context, Poll};

#[cfg(feature = "runtime-async-std")]
use async_std::io::{Read, Write};
#[cfg(feature = "runtime-tokio")]
use tokio::io::{AsyncRead as Read, AsyncWrite as Write};

#[derive(Default, Clone, Debug, Eq, PartialEq, Hash)]
pub struct MockStream {
    read_buf: Vec<u8>,
    read_pos: usize,
    pub written_buf: Vec<u8>,
    err_on_read: bool,
    eof_on_read: bool,
    read_delay: usize,
}

impl MockStream {
    pub fn new(read_buf: Vec<u8>) -> MockStream {
        MockStream::default().with_buf(read_buf)
    }

    pub fn with_buf(mut self, read_buf: Vec<u8>) -> MockStream {
        self.read_buf = read_buf;
        self
    }

    pub fn with_eof(mut self) -> MockStream {
        self.eof_on_read = true;
        self
    }

    pub fn with_err(mut self) -> MockStream {
        self.err_on_read = true;
        self
    }

    pub fn with_delay(mut self) -> MockStream {
        self.read_delay = 1;
        self
    }
}

#[cfg(feature = "runtime-tokio")]
impl Read for MockStream {
    fn poll_read(
        mut self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &mut tokio::io::ReadBuf<'_>,
    ) -> Poll<Result<()>> {
        if self.eof_on_read {
            return Poll::Ready(Ok(()));
        }
        if self.err_on_read {
            return Poll::Ready(Err(Error::new(ErrorKind::Other, "MockStream Error")));
        }
        if self.read_pos >= self.read_buf.len() {
            return Poll::Ready(Err(Error::new(ErrorKind::UnexpectedEof, "EOF")));
        }
        let mut write_len = min(buf.remaining(), self.read_buf.len() - self.read_pos);
        if self.read_delay > 0 {
            self.read_delay -= 1;
            write_len = min(write_len, 1);
        }
        let max_pos = self.read_pos + write_len;
        buf.put_slice(&self.read_buf[self.read_pos..max_pos]);
        self.read_pos += write_len;
        Poll::Ready(Ok(()))
    }
}

#[cfg(feature = "runtime-tokio")]
impl Write for MockStream {
    fn poll_write(
        mut self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize>> {
        self.written_buf.extend_from_slice(buf);
        Poll::Ready(Ok(buf.len()))
    }

    fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
        Poll::Ready(Ok(()))
    }

    fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<std::io::Result<()>> {
        Poll::Ready(Ok(()))
    }
}

#[cfg(feature = "runtime-async-std")]
impl Read for MockStream {
    fn poll_read(
        mut self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &mut [u8],
    ) -> Poll<Result<usize>> {
        if self.eof_on_read {
            return Poll::Ready(Ok(0));
        }
        if self.err_on_read {
            return Poll::Ready(Err(Error::other("MockStream Error")));
        }
        if self.read_pos >= self.read_buf.len() {
            return Poll::Ready(Err(Error::new(ErrorKind::UnexpectedEof, "EOF")));
        }
        let mut write_len = min(buf.len(), self.read_buf.len() - self.read_pos);
        if self.read_delay > 0 {
            self.read_delay -= 1;
            write_len = min(write_len, 1);
        }
        let max_pos = self.read_pos + write_len;
        for x in self.read_pos..max_pos {
            buf[x - self.read_pos] = self.read_buf[x];
        }
        self.read_pos += write_len;
        Poll::Ready(Ok(write_len))
    }
}

#[cfg(feature = "runtime-async-std")]
impl Write for MockStream {
    fn poll_write(
        mut self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize>> {
        self.written_buf.extend_from_slice(buf);
        Poll::Ready(Ok(buf.len()))
    }

    fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
        Poll::Ready(Ok(()))
    }

    fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
        Poll::Ready(Ok(()))
    }
}