neo4rs 0.8.0

Rust driver for Neo4j
Documentation 
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use crate::types::{serde::DeError, BoltInteger, BoltMap, BoltString, BoltType, Result};
use ::serde::Deserialize;
use neo4rs_macros::BoltStruct;

#[derive(Debug, PartialEq, Clone, BoltStruct)]
#[signature(0xB5, 0x52)]
pub struct BoltRelation {
    pub id: BoltInteger,
    pub start_node_id: BoltInteger,
    pub end_node_id: BoltInteger,
    pub typ: BoltString,
    pub properties: BoltMap,
}

#[derive(Debug, PartialEq, Clone, BoltStruct)]
#[signature(0xB3, 0x72)]
pub struct BoltUnboundedRelation {
    pub id: BoltInteger,
    pub typ: BoltString,
    pub properties: BoltMap,
}

impl BoltUnboundedRelation {
    pub fn new(id: BoltInteger, typ: BoltString, properties: BoltMap) -> Self {
        BoltUnboundedRelation {
            id,
            typ,
            properties,
        }
    }
}

impl BoltRelation {
    pub fn get<'this, T>(&'this self, key: &str) -> Result<T, DeError>
    where
        T: Deserialize<'this>,
    {
        self.properties.get::<T>(key)
    }
}

impl BoltUnboundedRelation {
    pub fn get<'this, T>(&'this self, key: &str) -> Result<T, DeError>
    where
        T: Deserialize<'this>,
    {
        self.properties.get::<T>(key)
    }
}

impl From<BoltRelation> for BoltType {
    fn from(value: BoltRelation) -> Self {
        BoltType::Relation(value)
    }
}

impl From<BoltUnboundedRelation> for BoltType {
    fn from(value: BoltUnboundedRelation) -> Self {
        BoltType::UnboundedRelation(value)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::{types::BoltWireFormat, Version};
    use bytes::Bytes;

    #[test]
    fn should_serialize_a_relation() {
        let id = BoltInteger::new(42);
        let start_node_id = BoltInteger::new(1);
        let end_node_id = BoltInteger::new(2);
        let typ = BoltString::new("rel");
        let properties = vec![("name".into(), "Mark".into())].into_iter().collect();

        let relation = BoltRelation {
            id,
            start_node_id,
            end_node_id,
            typ,
            properties,
        };

        let bytes: Bytes = relation.into_bytes(Version::V4_1).unwrap();

        assert_eq!(
            bytes,
            Bytes::from_static(&[
                0xB5, 0x52, 0x2A, 0x01, 0x02, 0x83, 0x72, 0x65, 0x6C, 0xA1, 0x84, 0x6E, 0x61, 0x6D,
                0x65, 0x84, 0x4D, 0x61, 0x72, 0x6B,
            ])
        );
    }

    #[test]
    fn should_deserialize_a_relation() {
        let mut input = Bytes::from_static(&[
            0xB5, 0x52, 0x2A, 0x01, 0x02, 0x83, 0x72, 0x65, 0x6C, 0xA1, 0x84, 0x6E, 0x61, 0x6D,
            0x65, 0x84, 0x4D, 0x61, 0x72, 0x6B,
        ]);

        let relation: BoltRelation = BoltRelation::parse(Version::V4_1, &mut input).unwrap();

        assert_eq!(relation.id, BoltInteger::new(42));
        assert_eq!(relation.start_node_id, BoltInteger::new(1));
        assert_eq!(relation.end_node_id, BoltInteger::new(2));
        assert_eq!(relation.typ, BoltString::new("rel"));
        assert_eq!(
            relation.properties,
            vec![("name".into(), "Mark".into())].into_iter().collect()
        );
    }

    #[test]
    fn should_serialize_an_unbounded_relation() {
        let id = BoltInteger::new(42);
        let typ = BoltString::new("rel");
        let properties = vec![("name".into(), "Mark".into())].into_iter().collect();
        let relation = BoltUnboundedRelation::new(id, typ, properties);

        let bytes: Bytes = relation.into_bytes(Version::V4_1).unwrap();

        assert_eq!(
            bytes,
            Bytes::from_static(&[
                0xB3, 0x72, 0x2A, 0x83, 0x72, 0x65, 0x6C, 0xA1, 0x84, 0x6E, 0x61, 0x6D, 0x65, 0x84,
                0x4D, 0x61, 0x72, 0x6B,
            ])
        );
    }

    #[test]
    fn should_deserialize_an_unbounded_relation() {
        let mut input = Bytes::from_static(&[
            0xB3, 0x72, 0x2A, 0x83, 0x72, 0x65, 0x6C, 0xA1, 0x84, 0x6E, 0x61, 0x6D, 0x65, 0x84,
            0x4D, 0x61, 0x72, 0x6B,
        ]);

        let relation: BoltUnboundedRelation =
            BoltUnboundedRelation::parse(Version::V4_1, &mut input).unwrap();

        assert_eq!(relation.id, BoltInteger::new(42));
        assert_eq!(relation.typ, BoltString::new("rel"));
        assert_eq!(
            relation.properties,
            vec![("name".into(), "Mark".into())].into_iter().collect()
        );
    }
}