[Test🧪] Add unit tests for QueryAssignmentRequestBody

[mxsm]

Prerequisites

• I have searched existing test issues

Test Scope

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

Test Cases

The following test scenarios need to be implemented for QueryAssignmentRequestBody:

• 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 topic field with various values
• Test consumer_group field with various values
• Test client_id field with various values
• Test strategy_name field with various values
• Test message_model field with different MessageModel values
• Test MessageModel enum variants (e.g., Broadcasting, Clustering)
• Test with empty string fields
• Test with special characters in string fields
• Test Debug trait output
• Test creating struct with all fields populated

Willing to contribute?

• I can submit a PR for this