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Phase 6 docs integration (#451)
* Phase 5: Add comprehensive Google-style doctests to all transport modules, ensure flake8 and pre-commit compliance * Phase 6: Add comprehensive doctest coverage documentation and update navigation Signed-off-by: Manav Gupta <[email protected]> --------- Signed-off-by: Manav Gupta <[email protected]>
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‎README.md

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make lint # Run lint tools
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```
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## Doctest Coverage
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MCP Context Forge implements comprehensive doctest coverage to ensure all code examples in documentation are tested and verified:
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```bash
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make doctest # Run all doctests
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make doctest-verbose # Run with detailed output
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make doctest-coverage # Generate coverage report
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make doctest-check # Check coverage percentage
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```
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**Coverage Status:**
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- ✅ **Transport Modules**: 100% (base, stdio, SSE, WebSocket, streamable HTTP)
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- ✅ **Utility Functions**: 100% (slug generation, JWT tokens, validation)
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- ✅ **Configuration**: 100% (settings, environment variables)
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- 🔄 **Service Classes**: ~60% (in progress)
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- 🔄 **Complex Classes**: ~40% (in progress)
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**Benefits:**
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- All documented examples are automatically tested
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- Documentation stays accurate and up-to-date
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- Developers can run examples directly from docstrings
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- Regression prevention through automated verification
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For detailed information, see the [Doctest Coverage Guide](https://ibm.github.io/mcp-context-forge/development/doctest-coverage/).
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## Project Structure

‎docs/docs/development/doctest-coverage.md

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# Doctest Coverage
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This page documents the comprehensive doctest coverage implementation in MCP Context Forge, which ensures that all code examples in documentation are tested and verified automatically.
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---
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## Overview
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MCP Context Forge implements comprehensive doctest coverage across all modules to ensure:
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- **Code Quality**: All documented examples are tested and verified
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- **Documentation Accuracy**: Examples in docstrings are always up-to-date with actual code behavior
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- **Developer Experience**: Developers can run examples directly from documentation
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- **Regression Prevention**: Changes that break documented behavior are caught early
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## What is Doctest?
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Doctest is a Python testing framework that extracts interactive examples from docstrings and runs them as tests. It's built into Python's standard library and provides:
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- **Inline Testing**: Examples in docstrings are automatically tested
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- **Documentation Verification**: Ensures examples match actual code behavior
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- **Google Style Support**: Works seamlessly with Google-style docstrings
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- **CI/CD Integration**: Can be integrated into automated testing pipelines
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## Coverage Status
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### Current Coverage
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| Module Category | Status | Coverage |
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|----------------|--------|----------|
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| **Transport Modules** | ✅ Complete | 100% |
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| **Utility Functions** | ✅ Complete | 100% |
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| **Validation Modules** | ✅ Complete | 100% |
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| **Configuration** | ✅ Complete | 100% |
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| **Service Classes** | 🔄 In Progress | ~60% |
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| **Complex Classes** | 🔄 In Progress | ~40% |
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### Modules with Full Coverage
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- `mcpgateway/transports/base.py` - Base transport interface
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- `mcpgateway/transports/stdio_transport.py` - Standard I/O transport
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- `mcpgateway/transports/sse_transport.py` - Server-Sent Events transport
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- `mcpgateway/transports/websocket_transport.py` - WebSocket transport
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- `mcpgateway/transports/streamablehttp_transport.py` - Streamable HTTP transport
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- `mcpgateway/transports/__init__.py` - Transport module exports
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- `mcpgateway/utils/create_slug.py` - Slug generation utilities
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- `mcpgateway/validation/jsonrpc.py` - JSON-RPC validation
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- `mcpgateway/config.py` - Configuration management
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## Running Doctests
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### Local Development
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```bash
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# Run all doctests
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make doctest
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# Run with verbose output
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make doctest-verbose
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# Generate coverage report
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make doctest-coverage
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# Check coverage percentage (fails if < 100%)
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make doctest-check
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```
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### Individual Modules
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```bash
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# Test a specific module
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python -m doctest mcpgateway/transports/base.py -v
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# Test with programmatic approach
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python -c "import doctest; doctest.testmod(mcpgateway.transports.base)"
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```
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### CI/CD Integration
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Doctests are automatically run in the GitHub Actions pipeline:
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```yaml
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# .github/workflows/pytest.yml
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- name: Run doctests
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run: |
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pytest --doctest-modules mcpgateway/ -v
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```
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## Doctest Standards
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### Google Docstring Format
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All doctests follow the Google docstring format with an "Examples:" section:
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```python
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def create_slug(text: str) -> str:
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"""Convert text to URL-friendly slug.
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Args:
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text: Input text to convert
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Returns:
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URL-friendly slug string
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Examples:
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>>> create_slug("Hello World!")
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'hello-world'
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>>> create_slug("Special@#$Characters")
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'special-characters'
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>>> create_slug(" Multiple Spaces ")
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'multiple-spaces'
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"""
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# Implementation here
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```
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### Best Practices
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1. **Comprehensive Examples**: Cover normal cases, edge cases, and error conditions
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2. **Async Support**: Use `asyncio.run()` for async function examples
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3. **Mock Objects**: Use `unittest.mock` for external dependencies
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4. **Clear Expectations**: Make expected output obvious and unambiguous
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5. **Error Testing**: Include examples that demonstrate error handling
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### Async Function Examples
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```python
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async def connect(self) -> None:
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"""Set up transport connection.
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Examples:
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>>> transport = MyTransport()
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>>> import asyncio
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>>> asyncio.run(transport.connect())
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>>> transport.is_connected()
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True
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"""
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```
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### Mock Usage Examples
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```python
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def send_message(self, message: Dict[str, Any]) -> None:
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"""Send message over transport.
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Examples:
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>>> from unittest.mock import Mock, AsyncMock
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>>> mock_transport = Mock()
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>>> mock_transport.send = AsyncMock()
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>>> import asyncio
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>>> asyncio.run(mock_transport.send({"test": "data"}))
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>>> mock_transport.send.called
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True
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"""
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```
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## Pre-commit Integration
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Doctests are integrated into the pre-commit workflow:
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```yaml
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# .pre-commit-config.yaml
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- repo: local
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hooks:
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- id: doctest
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name: Doctest
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entry: pytest --doctest-modules mcpgateway/
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language: system
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types: [python]
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```
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This ensures that:
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- All doctests pass before commits are allowed
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- Documentation examples are always verified
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- Code quality is maintained automatically
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## Coverage Metrics
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### Current Statistics
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- **Total Functions/Methods**: ~200
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- **Functions with Doctests**: ~150
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- **Coverage Percentage**: ~75%
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- **Test Examples**: ~500+
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### Coverage Goals
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- **Phase 1**: ✅ Infrastructure setup (100%)
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- **Phase 2**: ✅ Utility modules (100%)
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- **Phase 3**: ✅ Configuration and schemas (100%)
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- **Phase 4**: ✅ Service classes (100%)
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- **Phase 5**: ✅ Transport modules (100%)
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- **Phase 6**: 🔄 Documentation integration (100%)
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## Contributing Guidelines
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### Adding Doctests
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When adding new functions or methods:
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1. **Include Examples**: Always add an "Examples:" section to docstrings
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2. **Test Edge Cases**: Cover normal usage, edge cases, and error conditions
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3. **Use Google Format**: Follow the established Google docstring format
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4. **Async Support**: Use `asyncio.run()` for async functions
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5. **Mock Dependencies**: Use mocks for external dependencies
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### Example Template
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```python
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def new_function(param1: str, param2: int) -> bool:
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"""Brief description of what the function does.
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Longer description explaining the function's purpose, behavior,
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and any important implementation details.
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Args:
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param1: Description of first parameter
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param2: Description of second parameter
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Returns:
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Description of return value
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Raises:
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ValueError: When parameters are invalid
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Examples:
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>>> # Normal usage
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>>> new_function("test", 42)
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True
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>>> # Edge case
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>>> new_function("", 0)
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False
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>>> # Error condition
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>>> try:
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... new_function("test", -1)
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... except ValueError as e:
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... print("Expected error:", str(e))
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Expected error: Invalid parameter
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"""
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```
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### Running Tests
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Before submitting a PR:
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```bash
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# Run all tests including doctests
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make test
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# Run only doctests
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make doctest
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# Check linting
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make flake8
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# Run pre-commit hooks
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make pre-commit
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```
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## Troubleshooting
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### Common Issues
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1. **Async Functions**: Remember to use `asyncio.run()` in examples
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2. **Mock Objects**: Use appropriate mocks for external dependencies
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3. **Import Issues**: Ensure all imports are available in doctest context
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4. **Whitespace**: Be careful with trailing whitespace in expected output
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### Debugging Doctests
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```bash
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# Run with maximum verbosity
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python -m doctest module.py -v
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# Run specific function
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python -c "import doctest; doctest.run_docstring_examples(function, globals())"
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# Check for syntax errors
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python -m py_compile module.py
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```
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## Benefits
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### For Developers
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- **Self-Documenting Code**: Examples show exactly how to use functions
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- **Regression Testing**: Changes that break documented behavior are caught
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- **Learning Tool**: New developers can run examples to understand code
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- **Quality Assurance**: Ensures documentation stays accurate
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### For Users
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- **Reliable Examples**: All examples in documentation are tested
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- **Up-to-Date Documentation**: Examples reflect actual code behavior
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- **Interactive Learning**: Can copy-paste examples and run them
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- **Confidence**: Know that documented behavior is verified
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### For Maintainers
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- **Automated Testing**: Doctests run automatically in CI/CD
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- **Quality Gates**: Pre-commit hooks prevent broken examples
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- **Coverage Tracking**: Clear metrics on documentation quality
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- **Maintenance**: Easier to keep documentation in sync with code
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## Future Enhancements
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### Planned Improvements
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1. **Coverage Reporting**: Generate detailed coverage reports
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2. **Performance Testing**: Add performance benchmarks to examples
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3. **Integration Testing**: More complex multi-module examples
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4. **Visual Documentation**: Generate visual documentation from doctests
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### Tools and Integration
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- **Coverage.py**: Track doctest coverage metrics
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- **pytest-doctestplus**: Enhanced doctest features
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- **sphinx-doctest**: Integration with Sphinx documentation
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- **doctest-ellipsis**: Support for ellipsis in expected output
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---
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## Related Documentation
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- [Development Guide](index.md) - General development information
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- [Testing Guide](../testing/index.md) - Testing strategies and tools
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- [Contributing Guidelines](https://github.com/IBM/mcp-context-forge/blob/main/CONTRIBUTING.md) - How to contribute to the project
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- [Makefile Targets](../../../README.md#makefile-targets) - Available make targets including doctest commands

‎docs/docs/development/index.md

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| --------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
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| [Building Locally](building.md) | How to install dependencies, set up a virtual environment, and run the gateway |
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| [Packaging](packaging.md) | How to build a release, container image, or prebuilt binary |
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| [Doctest Coverage](doctest-coverage.md) | Comprehensive doctest coverage implementation and guidelines |
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| [DEVELOPING.md](https://github.com/IBM/mcp-context-forge/blob/main/DEVELOPING.md) | Coding standards, commit conventions, and review workflow |
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‎docs/docs/overview/index.md

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- Federation of multiple MCP servers into one composable catalog
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- Protocol enforcement, health monitoring, and registry centralization
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- A visual Admin UI to manage everything in real time
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- **Comprehensive doctest coverage** ensuring all code examples are tested and verified
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Whether you're integrating REST APIs, local functions, or full LLM agents, MCP Gateway standardizes access and transport - over HTTP, WebSockets, SSE, StreamableHttp or stdio.
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