vendor/uuid/src/adapter/compact.rs

//! Module for use with `#[serde(with = "...")]` to serialize a [`Uuid`]
//! as a `[u8; 16]
//!
//! [`Uuid`]: ../../struct.Uuid.html

use serde::{Deserialize, Deserializer, Serialize, Serializer};

use prelude::*;

/// Serializer for a [`Uuid`] into a `[u8; 16]`
///
/// [`Uuid`]: ../../struct.Uuid.html
pub fn serialize<S: Serializer>(
    u: &Uuid,
    serializer: S,
) -> Result<S::Ok, S::Error> {
    u.as_bytes().serialize(serializer)
}

/// Deserializer from a `[u8; 16]` into a [`Uuid`]
///
/// [`Uuid`]: ../../struct.Uuid.html
pub fn deserialize<'de, D: Deserializer<'de>>(
    deserializer: D,
) -> Result<Uuid, D::Error> {
    let bytes = <[u8; 16]>::deserialize(deserializer)?;

    Ok(Uuid::from_bytes(bytes))
}

#[cfg(test)]
mod tests {
    use serde_test;

    use prelude::*;

    #[derive(Serialize, Debug, Deserialize, PartialEq)]
    struct UuidContainer {
        #[serde(with = "super")]
        u: Uuid,
    }

    #[test]
    fn test_serialize_compact() {
        use serde_test::Configure;

        let uuid_bytes = b"F9168C5E-CEB2-4F";
        let container = UuidContainer {
            u: Uuid::from_slice(uuid_bytes).unwrap(),
        };

        // more complex because of the struct wrapping the actual UUID
        // serialization
        serde_test::assert_tokens(
            &container.compact(),
            &[
                serde_test::Token::Struct {
                    name: "UuidContainer",
                    len: 1,
                },
                serde_test::Token::Str("u"),
                serde_test::Token::Tuple { len: 16 },
                serde_test::Token::U8(uuid_bytes[0]),
                serde_test::Token::U8(uuid_bytes[1]),
                serde_test::Token::U8(uuid_bytes[2]),
                serde_test::Token::U8(uuid_bytes[3]),
                serde_test::Token::U8(uuid_bytes[4]),
                serde_test::Token::U8(uuid_bytes[5]),
                serde_test::Token::U8(uuid_bytes[6]),
                serde_test::Token::U8(uuid_bytes[7]),
                serde_test::Token::U8(uuid_bytes[8]),
                serde_test::Token::U8(uuid_bytes[9]),
                serde_test::Token::U8(uuid_bytes[10]),
                serde_test::Token::U8(uuid_bytes[11]),
                serde_test::Token::U8(uuid_bytes[12]),
                serde_test::Token::U8(uuid_bytes[13]),
                serde_test::Token::U8(uuid_bytes[14]),
                serde_test::Token::U8(uuid_bytes[15]),
                serde_test::Token::TupleEnd,
                serde_test::Token::StructEnd,
            ],
        )
    }
}