nix_compat/wire/de/
bytes.rs

1use bytes::Bytes;
2
3use super::{Error, NixDeserialize, NixRead};
4
5impl NixDeserialize for Bytes {
6    async fn try_deserialize<R>(reader: &mut R) -> Result<Option<Self>, R::Error>
7    where
8        R: ?Sized + NixRead + Send,
9    {
10        reader.try_read_bytes().await
11    }
12}
13
14impl NixDeserialize for String {
15    async fn try_deserialize<R>(reader: &mut R) -> Result<Option<Self>, R::Error>
16    where
17        R: ?Sized + NixRead + Send,
18    {
19        if let Some(buf) = reader.try_read_bytes().await? {
20            String::from_utf8(buf.to_vec())
21                .map_err(R::Error::invalid_data)
22                .map(Some)
23        } else {
24            Ok(None)
25        }
26    }
27}
28
29#[cfg(test)]
30mod test {
31    use std::io;
32
33    use hex_literal::hex;
34    use rstest::rstest;
35    use tokio_test::io::Builder;
36
37    use crate::wire::de::{NixRead, NixReader};
38
39    #[rstest]
40    #[case::empty("", &hex!("0000 0000 0000 0000"))]
41    #[case::one(")", &hex!("0100 0000 0000 0000 2900 0000 0000 0000"))]
42    #[case::two("it", &hex!("0200 0000 0000 0000 6974 0000 0000 0000"))]
43    #[case::three("tea", &hex!("0300 0000 0000 0000 7465 6100 0000 0000"))]
44    #[case::four("were", &hex!("0400 0000 0000 0000 7765 7265 0000 0000"))]
45    #[case::five("where", &hex!("0500 0000 0000 0000 7768 6572 6500 0000"))]
46    #[case::six("unwrap", &hex!("0600 0000 0000 0000 756E 7772 6170 0000"))]
47    #[case::seven("where's", &hex!("0700 0000 0000 0000 7768 6572 6527 7300"))]
48    #[case::aligned("read_tea", &hex!("0800 0000 0000 0000 7265 6164 5F74 6561"))]
49    #[case::more_bytes("read_tess", &hex!("0900 0000 0000 0000 7265 6164 5F74 6573 7300 0000 0000 0000"))]
50    #[case::utf8("The quick brown 🦊 jumps over 13 lazy 🐶.", &hex!("2D00 0000 0000 0000  5468 6520 7175 6963  6b20 6272 6f77 6e20  f09f a68a 206a 756d  7073 206f 7665 7220  3133 206c 617a 7920  f09f 90b6 2e00 0000"))]
51    #[tokio::test]
52    async fn test_read_string(#[case] expected: &str, #[case] data: &[u8]) {
53        let mock = Builder::new().read(data).build();
54        let mut reader = NixReader::new(mock);
55        let actual: String = reader.read_value().await.unwrap();
56        assert_eq!(actual, expected);
57    }
58
59    #[tokio::test]
60    async fn test_read_string_invalid() {
61        let mock = Builder::new()
62            .read(&hex!("0300 0000 0000 0000 EDA0 8000 0000 0000"))
63            .build();
64        let mut reader = NixReader::new(mock);
65        assert_eq!(
66            io::ErrorKind::InvalidData,
67            reader.read_value::<String>().await.unwrap_err().kind()
68        );
69    }
70}
nix_compat/wire/de/bytes.rs

nix_compat/wire/de/
bytes.rs
