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//! jsonrpc id field

/// Request Id
#[derive(Debug, PartialEq, Clone, Hash, Eq, Deserialize, Serialize)]
#[serde(deny_unknown_fields)]
#[serde(untagged)]
pub enum Id {
	/// No id (notification)
	Null,
	/// Numeric id
	Num(u64),
	/// String id
	Str(String),
}

#[cfg(test)]
mod tests {
	use super::*;
	use serde_json;

	#[test]
	fn id_deserialization() {
		let s = r#""2""#;
		let deserialized: Id = serde_json::from_str(s).unwrap();
		assert_eq!(deserialized, Id::Str("2".into()));

		let s = r#"2"#;
		let deserialized: Id = serde_json::from_str(s).unwrap();
		assert_eq!(deserialized, Id::Num(2));

		let s = r#""2x""#;
		let deserialized: Id = serde_json::from_str(s).unwrap();
		assert_eq!(deserialized, Id::Str("2x".to_owned()));

		let s = r#"[null, 0, 2, "3"]"#;
		let deserialized: Vec<Id> = serde_json::from_str(s).unwrap();
		assert_eq!(
			deserialized,
			vec![Id::Null, Id::Num(0), Id::Num(2), Id::Str("3".into())]
		);
	}

	#[test]
	fn id_serialization() {
		let d = vec![
			Id::Null,
			Id::Num(0),
			Id::Num(2),
			Id::Num(3),
			Id::Str("3".to_owned()),
			Id::Str("test".to_owned()),
		];
		let serialized = serde_json::to_string(&d).unwrap();
		assert_eq!(serialized, r#"[null,0,2,3,"3","test"]"#);
	}
}