[Test🧪] Add unit tests for EndTransactionRequestHeader

[mxsm]

Prerequisites

• I have searched existing test issues

Test Scope

Module: rocketmq-remoting
File: src/protocol/header/end_transaction_request_header.rs
Current Coverage: Unknown
Target Coverage: 80%+

Test Cases

The following test scenarios need to be implemented for EndTransactionRequestHeader:

• Test default initialization creates empty struct
• Test Clone trait implementation preserves all fields
• Test serialization to JSON with camelCase field names
• Test deserialization from JSON with camelCase field names
• Test serialization/deserialization roundtrip
• Test flattened rpc_request_header serialization
• Test all required fields are present
• Test topic field with various values
• Test producer_group field with various values
• Test tran_state_table_offset field (u64)
• Test commit_log_offset field (u64)
• Test commit_or_rollback field with different transaction types
• Test commit_or_rollback values: COMMIT, ROLLBACK, NOT_TYPE
• Test from_transaction_check field with true/false
• Test msg_id field with various message IDs
• Test transaction_id field with Some value
• Test transaction_id field with None value
• Test RequestHeaderCodecV2 macro-generated methods
• Test with complete RpcRequestHeader nested structure
• Test Debug trait output

Willing to contribute?

• I can submit a PR for this