module-registry 0.1.0

# Testing - Module Registry

## Overview

This document provides comprehensive testing strategies and examples for the Module Registry module.

## Testing Strategy

### Testing Pyramid

1. **Unit Tests**: Test individual components
2. **Integration Tests**: Test component interactions
3. **System Tests**: Test complete system functionality
4. **Performance Tests**: Test performance characteristics
5. **Security Tests**: Test security features

### Testing Types

- **Functional Testing**: Test functionality
- **Performance Testing**: Test performance
- **Security Testing**: Test security features
- **Compatibility Testing**: Test cross-platform compatibility
- **Regression Testing**: Test for regressions

## Unit Testing

### Basic Unit Tests

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, DiscoveryQuery};

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    fn test_module_registration() {
        let registry = ModuleRegistry::new();
        let config = ModuleConfig::new()
            .with_name("test-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
        assert!(registry.is_registered("test-module"));
    }
    
    #[test]
    fn test_module_discovery() {
        let registry = ModuleRegistry::new();
        let config = ModuleConfig::new()
            .with_name("test-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        registry.register(config).unwrap();
        
        let query = DiscoveryQuery::new()
            .with_name_pattern("test*");
        
        let modules = registry.discover(query).unwrap();
        assert_eq!(modules.len(), 1);
    }
    
    #[test]
    fn test_module_instantiation() {
        let registry = ModuleRegistry::new();
        let config = ModuleConfig::new()
            .with_name("test-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        registry.register(config).unwrap();
        
        let instance = registry.create("test-module").unwrap();
        assert!(instance.process(b"test data").is_ok());
    }
}
```

### Advanced Unit Tests

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, ModuleType, RegistryError};

#[cfg(test)]
mod advanced_tests {
    use super::*;
    
    #[test]
    fn test_duplicate_module_registration() {
        let registry = ModuleRegistry::new();
        let config = ModuleConfig::new()
            .with_name("test-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        // First registration should succeed
        assert!(registry.register(config.clone()).is_ok());
        
        // Second registration should fail
        match registry.register(config) {
            Err(RegistryError::ModuleAlreadyRegistered { name }) => {
                assert_eq!(name, "test-module");
            }
            _ => panic!("Expected ModuleAlreadyRegistered error"),
        }
    }
    
    #[test]
    fn test_module_dependency_resolution() {
        let registry = ModuleRegistry::new();
        
        // Register base module
        let base_config = ModuleConfig::new()
            .with_name("base-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        registry.register(base_config).unwrap();
        
        // Register dependent module
        let dependent_config = ModuleConfig::new()
            .with_name("dependent-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .add_dependency("base-module");
        
        assert!(registry.register(dependent_config).is_ok());
    }
    
    #[test]
    fn test_circular_dependency_detection() {
        let registry = ModuleRegistry::new();
        
        // Register module A that depends on B
        let config_a = ModuleConfig::new()
            .with_name("module-a")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .add_dependency("module-b");
        
        registry.register(config_a).unwrap();
        
        // Register module B that depends on A (circular dependency)
        let config_b = ModuleConfig::new()
            .with_name("module-b")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .add_dependency("module-a");
        
        match registry.register(config_b) {
            Err(RegistryError::CircularDependency { cycle }) => {
                assert!(cycle.contains("module-a"));
                assert!(cycle.contains("module-b"));
            }
            _ => panic!("Expected CircularDependency error"),
        }
    }
}
```

## Integration Testing

### Web Application Integration

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, WebIntegrationConfig};

#[cfg(test)]
mod web_integration_tests {
    use super::*;
    
    #[test]
    fn test_web_application_integration() {
        let web_config = WebIntegrationConfig::new()
            .with_web_security(true)
            .with_api_security(true)
            .with_file_upload_security(true)
            .with_path_validation(true);
        
        let registry = ModuleRegistry::new()
            .with_web_integration_config(web_config);
        
        // Register web application modules
        let web_modules = vec![
            ("auth-module", ModuleType::Security, vec!["authentication", "authorization"]),
            ("user-module", ModuleType::DataProcessor, vec!["user-management", "profile"]),
            ("content-module", ModuleType::DataProcessor, vec!["content-management", "publishing"]),
            ("api-module", ModuleType::Network, vec!["api-gateway", "routing"]),
        ];
        
        for (name, module_type, capabilities) in web_modules {
            let config = ModuleConfig::new()
                .with_name(name)
                .with_version("1.0.0")
                .with_type(module_type);
            
            for capability in capabilities {
                config.add_capability(capability);
            }
            
            assert!(registry.register(config).is_ok());
        }
        
        // Test web application workflow
        let auth_module = registry.create("auth-module").unwrap();
        let user_module = registry.create("user-module").unwrap();
        let content_module = registry.create("content-module").unwrap();
        let api_module = registry.create("api-module").unwrap();
        
        // Test authentication
        let auth_data = b"user credentials";
        let auth_result = auth_module.process(auth_data).unwrap();
        assert!(!auth_result.is_empty());
        
        // Test user management
        let user_data = b"user profile data";
        let user_result = user_module.process(user_data).unwrap();
        assert!(!user_result.is_empty());
        
        // Test content management
        let content_data = b"content data";
        let content_result = content_module.process(content_data).unwrap();
        assert!(!content_result.is_empty());
        
        // Test API routing
        let api_data = b"API request data";
        let api_result = api_module.process(api_data).unwrap();
        assert!(!api_result.is_empty());
    }
}
```

### Microservice Integration

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, MicroserviceIntegrationConfig};

#[cfg(test)]
mod microservice_integration_tests {
    use super::*;
    
    #[test]
    fn test_microservice_integration() {
        let microservice_config = MicroserviceIntegrationConfig::new()
            .with_microservice_architecture(true)
            .with_service_registration(true)
            .with_service_discovery(true);
        
        let registry = ModuleRegistry::new()
            .with_microservice_integration_config(microservice_config);
        
        // Register microservice modules
        let microservices = vec![
            ("user-service", "User management service"),
            ("order-service", "Order processing service"),
            ("payment-service", "Payment processing service"),
            ("notification-service", "Notification service"),
        ];
        
        for (name, description) in microservices {
            let config = ModuleConfig::new()
                .with_name(name)
                .with_version("1.0.0")
                .with_type(ModuleType::Network)
                .with_metadata("description", description)
                .with_metadata("service_type", "microservice");
            
            assert!(registry.register(config).is_ok());
        }
        
        // Test microservice workflow
        let user_service = registry.create("user-service").unwrap();
        let order_service = registry.create("order-service").unwrap();
        let payment_service = registry.create("payment-service").unwrap();
        let notification_service = registry.create("notification-service").unwrap();
        
        // Test user service
        let user_data = b"user data";
        let user_result = user_service.process(user_data).unwrap();
        assert!(!user_result.is_empty());
        
        // Test order service
        let order_data = b"order data";
        let order_result = order_service.process(order_data).unwrap();
        assert!(!order_result.is_empty());
        
        // Test payment service
        let payment_data = b"payment data";
        let payment_result = payment_service.process(payment_data).unwrap();
        assert!(!payment_result.is_empty());
        
        // Test notification service
        let notification_data = b"notification data";
        let notification_result = notification_service.process(notification_data).unwrap();
        assert!(!notification_result.is_empty());
    }
}
```

### Plugin Integration

```rust
use module_registry::{ModuleRegistry, PluginConfig, PluginType, PluginIntegrationConfig};

#[cfg(test)]
mod plugin_integration_tests {
    use super::*;
    
    #[test]
    fn test_plugin_integration() {
        let plugin_config = PluginIntegrationConfig::new()
            .with_plugin_architecture(true)
            .with_plugin_registration(true)
            .with_plugin_instantiation(true);
        
        let registry = ModuleRegistry::new()
            .with_plugin_integration_config(plugin_config);
        
        // Register plugin modules
        let plugins = vec![
            ("data-processor-plugin", "Data processing plugin"),
            ("encryption-plugin", "Encryption plugin"),
            ("compression-plugin", "Compression plugin"),
            ("monitoring-plugin", "Monitoring plugin"),
        ];
        
        for (name, description) in plugins {
            let config = PluginConfig::new()
                .with_name(name)
                .with_version("1.0.0")
                .with_type(PluginType::DataProcessor)
                .with_metadata("description", description)
                .with_metadata("plugin_type", "extension");
            
            assert!(registry.register_plugin(config).is_ok());
        }
        
        // Test plugin workflow
        let data_processor = registry.create_plugin("data-processor-plugin").unwrap();
        let encryption = registry.create_plugin("encryption-plugin").unwrap();
        let compression = registry.create_plugin("compression-plugin").unwrap();
        let monitoring = registry.create_plugin("monitoring-plugin").unwrap();
        
        // Test data processing
        let data = b"input data";
        let processed_data = data_processor.process(data).unwrap();
        assert!(!processed_data.is_empty());
        
        // Test encryption
        let encrypted_data = encryption.process(&processed_data).unwrap();
        assert!(!encrypted_data.is_empty());
        
        // Test compression
        let compressed_data = compression.process(&encrypted_data).unwrap();
        assert!(!compressed_data.is_empty());
        
        // Test monitoring
        let monitoring_data = b"monitoring data";
        let monitoring_result = monitoring.process(monitoring_data).unwrap();
        assert!(!monitoring_result.is_empty());
    }
}
```

## Performance Testing

### Load Testing

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, LoadTestConfig};

#[cfg(test)]
mod load_tests {
    use super::*;
    
    #[test]
    fn test_high_volume_registration() {
        let registry = ModuleRegistry::new();
        
        let start = std::time::Instant::now();
        let mut success_count = 0;
        let mut error_count = 0;
        
        for i in 0..10000 {
            let config = ModuleConfig::new()
                .with_name(&format!("module-{}", i))
                .with_version("1.0.0")
                .with_type(ModuleType::DataProcessor);
            
            match registry.register(config) {
                Ok(_) => success_count += 1,
                Err(_) => error_count += 1,
            }
        }
        
        let duration = start.elapsed();
        println!("Processed 10000 registrations in {:?}", duration);
        println!("Success: {}, Errors: {}", success_count, error_count);
        
        assert!(duration.as_millis() < 1000); // Should complete in less than 1 second
        assert_eq!(success_count, 10000);
        assert_eq!(error_count, 0);
    }
    
    #[test]
    fn test_concurrent_registration() {
        use std::sync::Arc;
        use std::thread;
        
        let registry = Arc::new(ModuleRegistry::new());
        let mut handles = vec![];
        
        for i in 0..10 {
            let registry = Arc::clone(&registry);
            let handle = thread::spawn(move || {
                for j in 0..1000 {
                    let config = ModuleConfig::new()
                        .with_name(&format!("module-{}-{}", i, j))
                        .with_version("1.0.0")
                        .with_type(ModuleType::DataProcessor);
                    
                    assert!(registry.register(config).is_ok());
                }
            });
            handles.push(handle);
        }
        
        for handle in handles {
            handle.join().unwrap();
        }
    }
}
```

### Stress Testing

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, StressTestConfig};

#[cfg(test)]
mod stress_tests {
    use super::*;
    
    #[test]
    fn test_memory_usage() {
        let registry = ModuleRegistry::new();
        let initial_memory = get_memory_usage();
        
        // Process many modules
        for i in 0..100000 {
            let config = ModuleConfig::new()
                .with_name(&format!("module-{}", i))
                .with_version("1.0.0")
                .with_type(ModuleType::DataProcessor);
            
            let _ = registry.register(config);
        }
        
        let final_memory = get_memory_usage();
        let memory_increase = final_memory - initial_memory;
        
        // Memory increase should be reasonable
        assert!(memory_increase < 100 * 1024 * 1024); // Less than 100MB
    }
    
    #[test]
    fn test_cpu_usage() {
        let registry = ModuleRegistry::new();
        let start = std::time::Instant::now();
        
        // Process many modules
        for i in 0..100000 {
            let config = ModuleConfig::new()
                .with_name(&format!("module-{}", i))
                .with_version("1.0.0")
                .with_type(ModuleType::DataProcessor);
            
            let _ = registry.register(config);
        }
        
        let duration = start.elapsed();
        let throughput = 100000.0 / duration.as_secs_f64();
        
        // Should process at least 1000 modules per second
        assert!(throughput > 1000.0);
    }
}
```

## Security Testing

### Security Validation Testing

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, SecurityTestConfig};

#[cfg(test)]
mod security_tests {
    use super::*;
    
    #[test]
    fn test_secure_registration() {
        let registry = ModuleRegistry::new()
            .with_security(true);
        
        // Test secure registration
        let config = ModuleConfig::new()
            .with_name("secure-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
    
    #[test]
    fn test_access_control() {
        let registry = ModuleRegistry::new()
            .with_access_control(true);
        
        // Test access control
        let config = ModuleConfig::new()
            .with_name("protected-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
    
    #[test]
    fn test_audit_logging() {
        let registry = ModuleRegistry::new()
            .with_audit_logging(true);
        
        // Test audit logging
        let config = ModuleConfig::new()
            .with_name("audited-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
}
```

### Vulnerability Testing

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, VulnerabilityTestConfig};

#[cfg(test)]
mod vulnerability_tests {
    use super::*;
    
    #[test]
    fn test_malicious_module_registration() {
        let registry = ModuleRegistry::new()
            .with_security(true);
        
        // Test malicious module registration
        let malicious_config = ModuleConfig::new()
            .with_name("../../../etc/passwd")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        // Should be blocked by security
        assert!(registry.register(malicious_config).is_err());
    }
    
    #[test]
    fn test_injection_attacks() {
        let registry = ModuleRegistry::new()
            .with_security(true);
        
        // Test injection attacks
        let injection_config = ModuleConfig::new()
            .with_name("'; DROP TABLE modules; --")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        // Should be blocked by security
        assert!(registry.register(injection_config).is_err());
    }
    
    #[test]
    fn test_privilege_escalation() {
        let registry = ModuleRegistry::new()
            .with_access_control(true);
        
        // Test privilege escalation
        let privilege_config = ModuleConfig::new()
            .with_name("admin-module")
            .with_version("1.0.0")
            .with_type(ModuleType::Security);
        
        // Should be blocked by access control
        assert!(registry.register(privilege_config).is_err());
    }
}
```

## Compatibility Testing

### Cross-Platform Testing

```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, CrossPlatformTestConfig};

#[cfg(test)]
mod cross_platform_tests {
    use super::*;
    
    #[test]
    fn test_windows_compatibility() {
        let registry = ModuleRegistry::new()
            .with_windows_compatibility(true);
        
        // Test Windows-specific modules
        let windows_config = ModuleConfig::new()
            .with_name("windows-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("platform", "windows");
        
        assert!(registry.register(windows_config).is_ok());
    }
    
    #[test]
    fn test_unix_compatibility() {
        let registry = ModuleRegistry::new()
            .with_unix_compatibility(true);
        
        // Test Unix-specific modules
        let unix_config = ModuleConfig::new()
            .with_name("unix-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("platform", "unix");
        
        assert!(registry.register(unix_config).is_ok());
    }
    
    #[test]
    fn test_macos_compatibility() {
        let registry = ModuleRegistry::new()
            .with_macos_compatibility(true);
        
        // Test macOS-specific modules
        let macos_config = ModuleConfig::new()
            .with_name("macos-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("platform", "macos");
        
        assert!(registry.register(macos_config).is_ok());
    }
}
```

## Test Automation

### Continuous Integration

```rust
use module_registry::{ModuleRegistry, CIConfig};

#[cfg(test)]
mod ci_tests {
    use super::*;
    
    #[test]
    fn test_ci_pipeline() {
        let ci_config = CIConfig::new()
            .with_automated_testing(true)
            .with_continuous_testing(true)
            .with_test_optimization(true)
            .with_test_monitoring(true);
        
        let registry = ModuleRegistry::new()
            .with_ci_config(ci_config);
        
        // Run comprehensive test suite
        test_basic_functionality();
        test_advanced_features();
        test_performance_characteristics();
        test_security_features();
        test_cross_platform_compatibility();
    }
    
    fn test_basic_functionality() {
        let registry = ModuleRegistry::new();
        let config = ModuleConfig::new()
            .with_name("test-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
        assert!(registry.is_registered("test-module"));
    }
    
    fn test_advanced_features() {
        let registry = ModuleRegistry::new()
            .with_advanced_features(true);
        
        let config = ModuleConfig::new()
            .with_name("advanced-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
    
    fn test_performance_characteristics() {
        let registry = ModuleRegistry::new()
            .with_performance_optimization(true);
        
        let start = std::time::Instant::now();
        for i in 0..1000 {
            let config = ModuleConfig::new()
                .with_name(&format!("module-{}", i))
                .with_version("1.0.0")
                .with_type(ModuleType::DataProcessor);
            
            let _ = registry.register(config);
        }
        let duration = start.elapsed();
        assert!(duration.as_millis() < 100);
    }
    
    fn test_security_features() {
        let registry = ModuleRegistry::new()
            .with_security(true);
        
        let config = ModuleConfig::new()
            .with_name("secure-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
    
    fn test_cross_platform_compatibility() {
        let registry = ModuleRegistry::new()
            .with_cross_platform_compatibility(true);
        
        let config = ModuleConfig::new()
            .with_name("cross-platform-module")
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        assert!(registry.register(config).is_ok());
    }
}
```

## Conclusion

This comprehensive testing strategy ensures that the Module Registry is robust, secure, and performant across all supported platforms and use cases. By implementing these testing practices, you can ensure that your module registry implementation meets the highest standards of quality and security.

Key testing areas:

1. **Unit Testing**: Test individual components
2. **Integration Testing**: Test component interactions
3. **Performance Testing**: Test performance characteristics
4. **Security Testing**: Test security features
5. **Compatibility Testing**: Test cross-platform compatibility
6. **Test Automation**: Automate testing processes