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// Copyright 2026 The RocketMQ Rust Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::HashMap;
use cheetah_string::CheetahString;
use serde::Deserialize;
use serde::Serialize;
use crate::protocol::command_custom_header::CommandCustomHeader;
#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct EmptyHeader {}
impl CommandCustomHeader for EmptyHeader {
fn to_map(&self) -> Option<HashMap<CheetahString, CheetahString>> {
Some(HashMap::new())
}
}
#[cfg(test)]
mod tests {
use super::*;
use serde_json;
#[test]
fn test_empty_header_lifecycle() {
let header = EmptyHeader::default();
let json = serde_json::to_string(&header).unwrap();
assert_eq!(json, "{}");
let de: EmptyHeader = serde_json::from_str(&json).unwrap();
assert_eq!(header, de);
assert_eq!(header.to_map(), Some(HashMap::new()));
}
}