# CLI Mock Implementation Summary
## Overview
Created comprehensive mock implementations for testing QuDAG CLI commands without requiring actual network connections or running node instances.
## Files Created
### `/tools/cli/src/mocks.rs`
The main mock implementation file containing:
1. **MockNode** - Simulates complete node behavior
- State management (Stopped, Starting, Running, Stopping, Error)
- Peer management with connection tracking
- Network statistics simulation
- DAG statistics tracking
- Memory usage monitoring
- Activity simulation
2. **MockPeerManager** - Simulates peer management operations
- Connection attempt tracking
- Success/failure simulation
- Configurable connection behaviors
- Connection history logging
3. **MockNetworkStats** - Simulates network statistics
- Real-time stats updates
- Historical data tracking
- Configurable activity patterns
- Statistics reset functionality
4. **MockRpcClient** - Simulates RPC communication
- Request/response handling
- Per-method behavior configuration
- Request history tracking
- Latency simulation
- Error injection capabilities
5. **TestScenarioBuilder** - Creates complex test scenarios
- Multi-node scenario creation
- Network topology configuration (FullMesh, Ring, Star, Custom)
- Global behavior configuration
- Coordinated node management
### `/tools/cli/tests/mock_integration_tests.rs`
Comprehensive integration tests demonstrating:
- Node lifecycle management
- RPC client behavior configuration
- Peer manager functionality
- Network statistics simulation
- Complex scenario testing
- Request history tracking
### `/tools/cli/tests/cli_command_tests.rs`
CLI-specific tests showing:
- Command output verification
- Peer management testing
- Network statistics testing
- Network connectivity testing
- Status command testing
- Error scenario handling
- Concurrent operations testing
- Complex multi-node scenarios
### `/tools/cli/MOCKS_GUIDE.md`
Detailed documentation including:
- Usage examples
- Best practices
- Test patterns
- Component reference
- Advanced features
## Key Features
### Configurable Behaviors
```rust
pub struct MockBehavior {
pub should_succeed: bool,
pub latency_ms: u64,
pub error_message: String,
pub custom_response: Option<serde_json::Value>,
}
```
### Network Topologies
- **FullMesh**: All nodes connected to all others
- **Ring**: Circular connection pattern
- **Star**: Central hub with peripheral nodes
- **Custom**: User-defined connections
### Test Scenarios
```rust
let scenario = TestScenarioBuilder::new()
.add_node("node1".to_string())
.add_node("node2".to_string())
.with_topology(NetworkTopology::Ring)
.with_global_behavior("operation", behavior)
.build()
.await;
```
## Testing Results
All mock implementation tests pass successfully:
- ✅ `test_mock_node_lifecycle`
- ✅ `test_mock_peer_management`
- ✅ `test_mock_rpc_client`
- ✅ `test_scenario_builder`
## Usage Examples
### Basic Node Testing
```rust
let node = MockNode::new("test-node".to_string());
assert!(node.start().await.is_ok());
assert!(node.add_peer("192.168.1.10:8080".to_string()).await.is_ok());
let status = node.get_status().await;
assert_eq!(status.peers.len(), 1);
```
### RPC Testing with Custom Behaviors
```rust
let rpc = MockRpcClient::new(node);
rpc.set_behavior("custom_op", MockBehavior {
should_succeed: true,
latency_ms: 50,
custom_response: Some(serde_json::json!({"result": "success"})),
..Default::default()
}).await;
```
### Complex Scenario Testing
```rust
let scenario = TestScenarioBuilder::new()
.add_node("gateway".to_string())
.add_node("worker-1".to_string())
.add_node("worker-2".to_string())
.with_topology(NetworkTopology::Star { center: "gateway".to_string() })
.build()
.await;
scenario.start_all_nodes().await.unwrap();
scenario.simulate_activity(Duration::from_secs(1)).await;
```
## Benefits
1. **No External Dependencies**: Tests run without requiring actual nodes or network connections
2. **Configurable Behaviors**: Simulate various success/failure scenarios
3. **Performance Testing**: Support for concurrent operations and latency simulation
4. **Complex Scenarios**: Multi-node topologies for integration testing
5. **Debugging Support**: Request history and connection tracking
6. **Realistic Simulation**: Network activity, statistics, and state management
## Integration
The mock system is integrated into the CLI module under `#[cfg(test)]` to ensure it's only available during testing, keeping the production binary clean while providing comprehensive testing capabilities.
The implementation follows Rust testing best practices and provides a foundation for testing all CLI commands and scenarios without external dependencies.