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/// A Redis HELLO command.
use crate::cmd::Command;
use crate::frame::Frame;
pub struct Hello {
proto: Option<u8>,
}
impl Hello {
/// Creates a new Hello command.
///
/// # Arguments
///
/// * `msg` - An optional message to send with ping
///
/// # Returns
///
/// A new Ping command
///
/// # Examples
///
/// ```ignore
/// let hello = Hello::new(Some("hello".into()));
/// ```
pub fn new(proto: Option<u8>) -> Self {
Self { proto }
}
}
impl Command for Hello {
/// Converts the Hello command into a Frame to be transimitted over the stream.
fn into_stream(self) -> Frame {
let mut frame: Frame = Frame::array();
frame
.push_frame_to_array(Frame::BulkString("HELLO".into()))
.unwrap();
// do not push the message if it is None
if let Some(proto) = self.proto {
frame
.push_frame_to_array(Frame::BulkString(proto.to_string().into()))
.unwrap();
}
frame
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_hello() {
let hello = Hello::new(None);
let frame = hello.into_stream();
assert_eq!(frame, Frame::Array(vec![Frame::BulkString("HELLO".into())]));
let ping = Hello::new(Some(3));
let frame = ping.into_stream();
assert_eq!(
frame,
Frame::Array(vec![
Frame::BulkString("HELLO".into()),
Frame::BulkString(3.to_string().into()),
])
);
}
}