# FEAGI Test Coverage Plan

This document outlines the plan for expanding test coverage across the FEAGI codebase to ensure reliability and correctness.

## Current Test Coverage Status

The current test infrastructure includes:
- Basic pytest configuration
- Unit tests for core/config and core/backend modules
- Test for FCL Manager
- Limited coverage for other modules

## Test Coverage Goals

1. **Core Infrastructure**:
   - 90%+ coverage for all core modules
   - 100% coverage for configuration handling
   - 100% coverage for error handling

2. **Neural Processing Unit (NPU)**:
   - 85%+ coverage for FCL Manager and Burst Engine
   - 90%+ coverage for neuron operations and dynamics

3. **Other Components**:
   - 75%+ coverage for BDU, PNS, and API components
   - 80%+ coverage for utility functions

## Test Categories

### Unit Tests
- Test individual functions and classes in isolation
- Focus on input validation, edge cases, and error handling
- Use mocking for external dependencies

### Integration Tests
- Test interactions between components
- Verify proper communication between modules
- Test realistic workflows

### Performance Tests
- Benchmark critical operations
- Test memory usage and efficiency
- Verify scalability with increasing network size

## Implementation Strategy

### Phase 1: Expand Unit Test Coverage (Month 1)

#### Core Module Tests
- [ ] Create comprehensive tests for resource management
- [ ] Add tests for backend selection and capabilities
- [ ] Test configuration validation and loading

#### NPU Component Tests
- [ ] Expand FCL Manager tests with more scenarios
- [ ] Add Burst Engine simulation tests
- [ ] Test neuron and synapse operations

### Phase 2: Add Integration Tests (Month 2)

- [ ] Test interaction between NPU components
- [ ] Test configuration flow to backend instantiation
- [ ] Test event propagation between modules

### Phase 3: Performance and Stress Tests (Month 3)

- [ ] Create benchmarks for critical operations
- [ ] Test with large-scale neural networks
- [ ] Test memory handling under load

## Test Templates

### Unit Test Template
```python
def test_function_name_scenario_description():
    # Arrange
    # Set up test inputs and expected outputs

    # Act
    # Call the function being tested

    # Assert
    # Verify the results match expectations
```

### Integration Test Template
```python
def test_component_interaction_scenario():
    # Arrange
    # Set up components and their dependencies

    # Act
    # Execute workflow that involves multiple components

    # Assert
    # Verify components interact correctly
```

## Module Test Priorities

| Module | Current Coverage | Target Coverage | Priority |
|--------|------------------|----------------|----------|
| core/config | Medium | High | High |
| core/backend | Medium | High | High |
| npu/fcl_manager | Medium | High | High |
| npu/burst_engine | Low | High | Critical |
| bdu/components | Low | Medium | Medium |
| pns/interfaces | Low | Medium | Medium |
| api/endpoints | Low | Medium | Medium |
| utils/* | Low | High | High |

## Tools and Framework

1. **pytest**: Primary testing framework
2. **pytest-cov**: For coverage reporting
3. **pytest-benchmark**: For performance testing
4. **pytest-mock**: For dependency mocking

## Example Test Implementation

For the FCL Manager, we should have tests like:

```python
def test_fcl_update_with_single_neuron_firing():
    """Test FCL is correctly updated when a single neuron fires."""
    # Arrange
    fcl_manager = HierarchicalFCL()
    cortical_area_id = 1
    neuron_id = 42

    # Act
    fcl_manager.update_fcl({cortical_area_id: [neuron_id]})

    # Assert
    assert fcl_manager.get_area_fcl(cortical_area_id).contains(neuron_id)
    assert fcl_manager.get_global_fcl().contains(neuron_id)
```

## Continuous Integration Integration

All tests should be automatically run in the CI pipeline:
- On every pull request
- Nightly against the main branch
- With coverage reports generated and published

## Progress Tracking

| Module | Unit Tests | Integration Tests | Performance Tests | Coverage % |
|--------|------------|-------------------|-------------------|------------|
| core/config | □ | □ | □ | TBD |
| core/backend | □ | □ | □ | TBD |
| npu/fcl_manager | ✓ | □ | □ | TBD |
| npu/burst_engine | □ | □ | □ | TBD |
| bdu/* | □ | □ | □ | TBD |
| pns/* | □ | □ | □ | TBD |
| api/* | □ | □ | □ | TBD |
