# MCP (Model Context Protocol) Acceptance Testing Specification
**Version**: 1.0  
**Date**: 2025-09-10  
**Status**: Implementation Required  
**Coverage Target**: 100% of MCP tools, resources, and protocol features

## 1. Overview

This specification defines comprehensive acceptance testing for the `pmat` MCP server, ensuring 100% coverage of all MCP tools, resources, protocol compliance, and integration scenarios. Every MCP interface must be tested for correctness, protocol compliance, and interoperability with MCP clients.

## 2. MCP Protocol Background

### 2.1 MCP Architecture
- **JSON-RPC 2.0**: All MCP communication uses JSON-RPC 2.0 protocol
- **Bidirectional**: Supports both client-to-server and server-to-client communication
- **Capabilities**: Server advertises capabilities during initialization
- **Tools**: Server provides tools that clients can call
- **Resources**: Server can expose resources (files, data) to clients
- **Prompts**: Server can provide prompt templates to clients

### 2.2 Testing Methodology
- **Protocol Compliance**: Validate JSON-RPC 2.0 compliance for all messages
- **Integration Testing**: Test with real MCP clients (Claude Code, other MCP clients)
- **Error Handling**: Verify proper error responses according to JSON-RPC spec
- **Performance Testing**: Ensure reasonable response times for all operations
- **Security Testing**: Validate input sanitization and access controls

## 3. MCP Tools Coverage Matrix

### 3.1 Template Management Tools
| Tool Name | Coverage | Test Cases | Error Cases | Protocol |
|-----------|----------|------------|-------------|----------|
| `generate_template` | ⏳ | 12 | 6 | ⏳ |
| `list_templates` | ⏳ | 8 | 4 | ⏳ |
| `validate_template` | ⏳ | 10 | 5 | ⏳ |
| `scaffold_project` | ⏳ | 15 | 8 | ⏳ |
| `search_templates` | ⏳ | 9 | 4 | ⏳ |

### 3.2 Analysis Tools (Priority: Critical)
| Tool Name | Coverage | Test Cases | Error Cases | Protocol |
|-----------|----------|------------|-------------|----------|
| `analyze_code_churn` | ⏳ | 10 | 6 | ⏳ |
| `analyze_complexity` | ⏳ | 15 | 8 | ⏳ |
| `analyze_dag` | ⏳ | 12 | 6 | ⏳ |
| `generate_context` | ⏳ | 18 | 9 | ⏳ |
| `analyze_system_architecture` | ⏳ | 20 | 10 | ⏳ |
| `analyze_defect_probability` | ⏳ | 16 | 8 | ⏳ |
| `analyze_dead_code` | ⏳ | 12 | 6 | ⏳ |
| `analyze_deep_context` | ⏳ | 25 | 12 | ⏳ |
| `analyze_tdg` | ⏳ | 22 | 10 | ⏳ |
| `analyze_makefile_lint` | ⏳ | 10 | 5 | ⏳ |
| `analyze_provability` | ⏳ | 14 | 7 | ⏳ |
| `analyze_satd` | ⏳ | 11 | 6 | ⏳ |
| `quality_driven_development` | ⏳ | 20 | 10 | ⏳ |
| `analyze_lint_hotspot` | ⏳ | 8 | 4 | ⏳ |

### 3.3 Vectorized Analysis Tools (High Performance)
| Tool Name | Coverage | Test Cases | Error Cases | Protocol |
|-----------|----------|------------|-------------|----------|
| `analyze_duplicates_vectorized` | ⏳ | 12 | 6 | ⏳ |
| `analyze_graph_metrics_vectorized` | ⏳ | 10 | 5 | ⏳ |
| `analyze_name_similarity_vectorized` | ⏳ | 9 | 4 | ⏳ |
| `analyze_symbol_table_vectorized` | ⏳ | 11 | 6 | ⏳ |
| `analyze_incremental_coverage_vectorized` | ⏳ | 13 | 7 | ⏳ |
| `analyze_big_o_vectorized` | ⏳ | 8 | 4 | ⏳ |
| `generate_enhanced_report` | ⏳ | 15 | 8 | ⏳ |

### 3.4 Utility Tools
| Tool Name | Coverage | Test Cases | Error Cases | Protocol |
|-----------|----------|------------|-------------|----------|
| `get_server_info` | ⏳ | 5 | 2 | ⏳ |

## 4. MCP Protocol Message Testing

### 4.1 Protocol Methods Coverage
| Method | Coverage | Test Cases | Protocol Compliance |
|--------|----------|------------|---------------------|
| `initialize` | ⏳ | 10 | ⏳ |
| `initialized` | ⏳ | 5 | ⏳ |
| `tools/list` | ⏳ | 8 | ⏳ |
| `tools/call` | ⏳ | 50+ | ⏳ |
| `resources/list` | ⏳ | 6 | ⏳ |
| `resources/read` | ⏳ | 10 | ⏳ |
| `prompts/list` | ⏳ | 4 | ⏳ |
| `prompts/get` | ⏳ | 8 | ⏳ |
| `notifications/*` | ⏳ | 12 | ⏳ |

### 4.2 JSON-RPC 2.0 Compliance Testing
- **Message Structure**: All messages must have `jsonrpc: "2.0"`
- **Request ID Handling**: Proper request/response ID matching
- **Error Codes**: Use standard JSON-RPC error codes
- **Batch Requests**: Support for batch JSON-RPC requests
- **Notifications**: Support for notification messages (no response expected)

## 5. Test Implementation Structure

### 5.1 Test Organization
```
server/tests/mcp_acceptance/
├── test_protocol_compliance.rs    # JSON-RPC 2.0 compliance
├── test_initialization.rs         # MCP handshake and capabilities
├── test_template_tools.rs         # Template management tools
├── test_analysis_tools.rs         # Code analysis tools
├── test_vectorized_tools.rs       # High-performance tools
├── test_resources.rs              # Resource management
├── test_prompts.rs                # Prompt templates
├── test_error_handling.rs         # Error scenarios
├── test_performance.rs            # Performance benchmarks
├── test_security.rs               # Security and validation
├── test_integration.rs            # End-to-end workflows
└── helpers/
    ├── mcp_test_client.rs         # Test MCP client implementation
    ├── message_validators.rs      # JSON-RPC validation helpers
    ├── mock_scenarios.rs          # Test data and scenarios
    └── protocol_helpers.rs        # MCP protocol utilities
```

### 5.2 Test Client Implementation
```rust
pub struct McpTestClient {
    server_process: Child,
    stdin: ChildStdin,
    stdout: BufReader<ChildStdout>,
    request_id_counter: u64,
}

impl McpTestClient {
    pub async fn initialize() -> Result<Self>;
    pub async fn send_request(&mut self, method: &str, params: Value) -> Result<Value>;
    pub async fn call_tool(&mut self, tool_name: &str, args: Value) -> Result<Value>;
    pub async fn list_tools(&mut self) -> Result<Vec<Tool>>;
    pub async fn get_capabilities(&mut self) -> Result<Capabilities>;
    pub fn shutdown(&mut self) -> Result<()>;
}
```

## 6. Test Case Specifications

### 6.1 Protocol Compliance Test Template
```rust
#[tokio::test]
async fn test_tool_protocol_compliance() {
    // Arrange
    let mut client = McpTestClient::initialize().await.unwrap();
    let request = json!({
        "tool_name": "analyze_complexity",
        "arguments": {
            "paths": ["src/"],
            "threshold": 10
        }
    });
    
    // Act
    let response = client.call_tool("analyze_complexity", request).await.unwrap();
    
    // Assert Protocol Compliance
    assert_json_rpc_compliance(&response);
    assert_response_structure(&response, &["status", "message", "results"]);
    assert_response_types(&response);
    assert_no_protocol_errors(&response);
    
    // Assert Business Logic
    assert_complexity_analysis_format(&response);
    assert_reasonable_response_time(client.last_request_duration());
    
    client.shutdown().unwrap();
}
```

### 6.2 Critical Test Scenarios

#### 6.2.1 Initialization and Capabilities
- **Server Startup**: MCP server starts correctly and listens on stdio
- **Handshake**: Complete MCP initialization handshake
- **Capabilities**: Server advertises correct capabilities
- **Tool Discovery**: Client can list all available tools
- **Resource Discovery**: Client can discover available resources

#### 6.2.2 Tool Execution Testing
- **Valid Parameters**: Tools execute with correct parameters
- **Parameter Validation**: Tools reject invalid parameters with proper errors
- **Response Format**: All tool responses follow consistent schema
- **Streaming Support**: Long-running tools can stream progress updates
- **Cancellation**: Tools respond to cancellation requests

#### 6.2.3 Error Handling Testing
- **Invalid Tool Names**: Proper error for non-existent tools
- **Malformed Requests**: JSON-RPC error handling for bad requests
- **Parameter Errors**: Clear error messages for invalid parameters
- **System Errors**: Graceful handling of file system and resource errors
- **Timeout Handling**: Proper behavior for long-running operations

#### 6.2.4 Integration Testing
- **Workflow Testing**: Multi-tool workflows (analyze → generate → validate)
- **State Management**: Tools that depend on previous tool results
- **Resource Access**: Tools that read project resources
- **Context Preservation**: Tools that build on previous analysis

## 7. Performance Requirements

### 7.1 Response Time Targets
| Tool Category | Max Response Time | Notes |
|---------------|-------------------|--------|
| Info/Discovery | 1 second | Tool listing, server info |
| Simple Analysis | 10 seconds | Single file analysis |
| Complex Analysis | 2 minutes | Project-wide analysis |
| Code Generation | 30 seconds | Template generation |
| Resource Access | 5 seconds | File reading operations |

### 7.2 Scalability Testing
- **Concurrent Requests**: Handle multiple simultaneous tool calls
- **Large Projects**: Test with projects containing 10K+ files
- **Memory Usage**: Monitor memory consumption during analysis
- **Resource Cleanup**: Verify proper cleanup after tool execution

## 8. Security Testing

### 8.1 Input Validation
- **Path Traversal**: Prevent access to files outside project scope
- **Code Injection**: Sanitize all user inputs
- **Resource Limits**: Prevent excessive resource consumption
- **Parameter Validation**: Type checking and bounds validation

### 8.2 Access Control
- **File System Access**: Tools only access intended files
- **Network Access**: Verify network restrictions if any
- **Process Isolation**: Tools don't interfere with each other
- **Capability Enforcement**: Tools only perform advertised capabilities

## 9. Client Compatibility Testing

### 9.1 Reference Clients
- **Claude Code**: Test integration with Claude Code IDE
- **MCP Reference Client**: Test with official MCP client
- **Custom Test Client**: Dedicated test client for edge cases
- **Mock Clients**: Test error scenarios and edge cases

### 9.2 Client Behavior Testing
- **Connection Handling**: Graceful connection establishment/teardown
- **Message Ordering**: Proper handling of concurrent requests
- **Error Recovery**: Client behavior during server errors
- **Capability Negotiation**: Proper capability discovery and usage

## 10. Quality Gates

### 10.1 Coverage Requirements
- **✅ 100% Tool Coverage**: Every MCP tool has comprehensive tests
- **✅ 100% Protocol Coverage**: All JSON-RPC methods tested
- **✅ 100% Error Path Coverage**: All error conditions tested
- **✅ 90% Integration Coverage**: Major workflow scenarios tested

### 10.2 Quality Standards
- **Zero Protocol Violations**: All messages must be JSON-RPC 2.0 compliant
- **Zero Test Failures**: All MCP acceptance tests pass consistently
- **Performance Compliance**: All tools meet response time targets
- **Security Compliance**: All security tests pass

## 11. Implementation Phases

### 11.1 Phase 1: Protocol Foundation (Week 1)
- Implement MCP test client framework
- Test basic protocol compliance (initialize, tools/list)
- Test core template tools (generate, list, validate)
- Test simple analysis tools (complexity, dead-code)
- Target: 25% coverage

### 11.2 Phase 2: Analysis Tools (Week 2)
- Test all analysis tools thoroughly
- Test vectorized tools for performance
- Test error handling for all tools
- Implement performance benchmarks
- Target: 60% coverage

### 11.3 Phase 3: Advanced Features (Week 3)
- Test resources and prompts functionality
- Test streaming and long-running operations
- Test concurrent request handling
- Integration testing with real MCP clients
- Target: 85% coverage

### 11.4 Phase 4: Production Readiness (Week 4)
- Security testing and hardening
- Cross-platform compatibility testing
- Performance optimization based on benchmarks
- Documentation and compliance verification
- Target: 100% coverage

## 12. Continuous Integration

### 12.1 Automated Testing
```bash
# Daily MCP acceptance test run
cargo test mcp_acceptance --release -- --nocapture

# Protocol compliance testing
cargo test mcp_protocol_compliance --release

# Integration testing with real clients
make test-mcp-integration

# Performance regression testing
cargo test mcp_performance --release -- --nocapture
```

### 12.2 Quality Monitoring
- **Response Time Monitoring**: Track tool response times
- **Protocol Compliance**: Automated JSON-RPC validation  
- **Client Compatibility**: Regular testing with reference clients
- **Error Rate Monitoring**: Track and alert on error rates

## 13. Success Criteria

### 13.1 Functional Excellence
- **✅ 100% Tool Coverage**: Every MCP tool comprehensively tested
- **✅ Protocol Compliance**: Full JSON-RPC 2.0 compliance verified
- **✅ Client Compatibility**: Works with all major MCP clients
- **✅ Error Handling**: Graceful error handling in all scenarios

### 13.2 Performance Excellence
- **✅ Response Time Targets**: All tools meet performance requirements
- **✅ Scalability**: Handles large projects and concurrent requests
- **✅ Resource Efficiency**: Reasonable memory and CPU usage
- **✅ Reliability**: Stable operation under load and error conditions

### 13.3 Security Excellence
- **✅ Input Validation**: All inputs properly validated and sanitized
- **✅ Access Control**: Proper file system and resource access controls
- **✅ Attack Resistance**: Resistant to common security attacks
- **✅ Audit Trail**: Comprehensive logging for security monitoring

---

**Implementation Status**: ⏳ **PENDING IMPLEMENTATION**
**Target Completion**: Sprint 93 (4 weeks)
**Responsibility**: Development Team + DevOps
**Success Metric**: 100% MCP tool coverage with enterprise-grade protocol compliance