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use serde::{Deserialize, Serialize};
use crate::semver;
/// Represents version information.
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Version {
/// Server version.
pub server_version: semver::Version,
/// Protocol version.
pub protocol_version: semver::Version,
/// Additional features available.
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub capabilities: Vec<String>,
}
impl Version {
/// Supports executing processes.
pub const CAP_EXEC: &'static str = "exec";
/// Supports reading and writing via filesystem IO.
pub const CAP_FS_IO: &'static str = "fs_io";
/// Supports modifying permissions of filesystem.
pub const CAP_FS_PERM: &'static str = "fs_perm";
/// Supports searching filesystem.
pub const CAP_FS_SEARCH: &'static str = "fs_search";
/// Supports watching filesystem for changes.
pub const CAP_FS_WATCH: &'static str = "fs_watch";
/// Supports TCP tunneling.
// pub const CAP_TCP_TUNNEL: &'static str = "tcp_tunnel";
/// Supports TCP reverse tunneling.
// pub const CAP_TCP_REV_TUNNEL: &'static str = "tcp_rev_tunnel";
/// Supports retrieving system information.
pub const CAP_SYS_INFO: &'static str = "sys_info";
pub const fn capabilities() -> &'static [&'static str] {
&[
Self::CAP_EXEC,
Self::CAP_FS_IO,
Self::CAP_FS_PERM,
Self::CAP_FS_SEARCH,
Self::CAP_FS_WATCH,
/* Self::CAP_TCP_TUNNEL,
Self::CAP_TCP_REV_TUNNEL, */
Self::CAP_SYS_INFO,
]
}
}
#[cfg(test)]
mod tests {
use super::*;
use semver::Version as SemVer;
#[test]
fn should_be_able_to_serialize_to_json() {
let version = Version {
server_version: "123.456.789-rc+build".parse().unwrap(),
protocol_version: SemVer::new(1, 2, 3),
capabilities: vec![String::from("cap")],
};
let value = serde_json::to_value(version).unwrap();
assert_eq!(
value,
serde_json::json!({
"server_version": "123.456.789-rc+build",
"protocol_version": "1.2.3",
"capabilities": ["cap"]
})
);
}
#[test]
fn should_be_able_to_deserialize_from_json() {
let value = serde_json::json!({
"server_version": "123.456.789-rc+build",
"protocol_version": "1.2.3",
"capabilities": ["cap"]
});
let version: Version = serde_json::from_value(value).unwrap();
assert_eq!(
version,
Version {
server_version: "123.456.789-rc+build".parse().unwrap(),
protocol_version: SemVer::new(1, 2, 3),
capabilities: vec![String::from("cap")],
}
);
}
#[test]
fn should_be_able_to_serialize_to_msgpack() {
let version = Version {
server_version: "123.456.789-rc+build".parse().unwrap(),
protocol_version: SemVer::new(1, 2, 3),
capabilities: vec![String::from("cap")],
};
// NOTE: We don't actually check the output here because it's an implementation detail
// and could change as we change how serialization is done. This is merely to verify
// that we can serialize since there are times when serde fails to serialize at
// runtime.
let _ = rmp_serde::encode::to_vec_named(&version).unwrap();
}
#[test]
fn should_be_able_to_deserialize_from_msgpack() {
// NOTE: It may seem odd that we are serializing just to deserialize, but this is to
// verify that we are not corrupting or causing issues when serializing on a
// client/server and then trying to deserialize on the other side. This has happened
// enough times with minor changes that we need tests to verify.
let buf = rmp_serde::encode::to_vec_named(&Version {
server_version: "123.456.789-rc+build".parse().unwrap(),
protocol_version: SemVer::new(1, 2, 3),
capabilities: vec![String::from("cap")],
})
.unwrap();
let version: Version = rmp_serde::decode::from_slice(&buf).unwrap();
assert_eq!(
version,
Version {
server_version: "123.456.789-rc+build".parse().unwrap(),
protocol_version: SemVer::new(1, 2, 3),
capabilities: vec![String::from("cap")],
}
);
}
}