# Trace ID Functionality Test Plan
## 1. Test Objectives
To verify that the trace_id functionality in Zephyr MCP Agent works correctly, ensuring that each request contains a unique trace_id that remains consistent throughout the request processing flow, and is properly displayed in logs and responses.
## 2. Test Scope
- **trace_id Generation and Retrieval**
- **trace_id Propagation in HTTP Request Processing Flow**
- **trace_id Recording in Log System**
- **trace_id Inclusion in HTTP Responses**
- **trace_id Handling in Exceptional Cases**
- **trace_id Support for Various Endpoints**
## 3. Test Scenarios
### 3.1 trace_id Generation and Retrieval Tests
- **Scenario 1.1**: Client Provides X-Trace-ID Header
- Verify that the server correctly uses the client-provided trace_id
- Verify that the trace_id returned in the response matches the one in the request header
- **Scenario 1.2**: Client Does Not Provide X-Trace-ID Header
- Verify that the server automatically generates a valid UUID format trace_id
- Verify that the generated trace_id is 36 characters long (standard UUID format)
### 3.2 HTTP Endpoint Tests
- **Scenario 2.1**: Health Check Endpoint (`/health`)
- Test if GET requests contain trace_id
- Test if both response JSON and response headers contain trace_id
- **Scenario 2.2**: Tool List Endpoint (`/api/tools`)
- Test trace_id handling for GET requests
- Verify that tool information responses contain trace_id
- **Scenario 2.3**: AI Assistant Endpoint (`/api/ai_assistant`)
- Test trace_id handling for POST requests
- Verify that chat responses contain trace_id
- **Scenario 2.4**: Tool Call Endpoint (`/api/tool`)
- Test trace_id handling for tool execution requests
- Verify that tool execution results contain trace_id
- **Scenario 2.5**: Invalid Endpoint (404 Response)
- Test if requests to non-existent endpoints also contain trace_id
- Verify that error responses contain trace_id
### 3.3 Exception Handling Tests
- **Scenario 3.1**: JSON Parsing Error
- Send incorrectly formatted JSON data
- Verify that error responses contain trace_id
- **Scenario 3.2**: Tool Execution Error
- Call a non-existent tool
- Verify that both error responses and logs contain trace_id
- **Scenario 3.3**: Server Internal Error
- Simulate server internal exception
- Verify that both error responses and logs contain trace_id
### 3.4 Log System Tests
- **Scenario 4.1**: Normal Operation Logs
- Verify that logs for normal request processing contain trace_id
- Verify correct log format: `[timestamp] [log_level] [trace_id] message`
- **Scenario 4.2**: Error Logs
- Verify that logs under error conditions contain trace_id
- Verify that exception stack logs contain trace_id
## 4. Test Methods
### 4.1 Unit Testing
- Test `uuid` import and trace_id generation functions
- Test trace_id retrieval logic in HTTP handlers
- Test trace_id addition logic in response constructor functions
### 4.2 Integration Testing
- Use the `requests` library to simulate HTTP requests
- Send various types of requests (GET/POST) to different endpoints
- Verify trace_id in request headers, response headers, and response bodies
### 4.3 Log Verification
- Capture server log output
- Verify that logs contain the expected trace_id format
- Verify that all log entries for each request contain the same trace_id
## 5. Test Cases
### 5.1 Unit Test Cases
1. **test_trace_id_generation()**
- Verify that generated trace_id is a valid UUID
- Verify that generated trace_id has correct length
2. **test_trace_id_from_header()**
- Simulate HTTP request header containing X-Trace-ID
- Verify correct extraction and use of that trace_id
3. **test_response_trace_id_inclusion()**
- Verify that various response types all contain trace_id
### 5.2 Integration Test Cases
1. **test_health_endpoint_trace_id()**
- Test trace_id handling for /health endpoint
2. **test_tools_endpoint_trace_id()**
- Test trace_id handling for /api/tools endpoint
3. **test_ai_assistant_trace_id()**
- Test trace_id handling for /api/ai_assistant endpoint
4. **test_error_response_trace_id()**
- Test trace_id handling under various error scenarios
## 6. Test Tools and Dependencies
- **Python 3.x**
- **requests library** - For sending HTTP requests
- **unittest/pytest** - Testing framework
- **uuid module** - For validating UUID format
- **mock library** - For simulating server behavior
## 7. Expected Results
- All requests should contain trace_id (whether provided by client or not)
- Response JSON should contain the same trace_id as the request
- Response headers should contain X-Trace-ID field
- All log entries should contain trace_id
- Error responses under exceptional conditions should also contain trace_id
## 8. Test Execution Steps
1. Start Zephyr MCP Agent server
2. Run automated test scripts
3. Verify test results match expectations
4. Check trace_id format in server logs
## 9. Acceptance Criteria
- All test cases pass
- Log format complies with specifications
- Responses consistently contain trace_id
- Exception handling correctly includes trace_id
## 10. Risks and Mitigation Measures
- **Risk**: Log system configuration may affect trace_id format
**Mitigation**: Ensure log configuration is correct before testing
- **Risk**: Some error paths may not properly propagate trace_id
**Mitigation**: Comprehensive testing of all error scenarios
- **Risk**: Third-party dependencies may affect UUID generation
**Mitigation**: Use the standard uuid module
