/**
* Unit Tests for MCP Server Main Function
* Tests main execution, error handling, and configuration
*/
import { describe, test, expect, vi, beforeEach, afterEach } from 'vitest';
import { createDesignPatternsServer } from '../../src/mcp-server.js';
describe('MCP Server Main Function', () => {
beforeEach(() => {
// Reset process.env
delete process.env.DATABASE_PATH;
delete process.env.LOG_LEVEL;
delete process.env.ENABLE_LLM;
delete process.env.MAX_CONCURRENT_REQUESTS;
});
test('should create server with factory function', () => {
const config = {
databasePath: './data/design-patterns.db',
logLevel: 'info' as const,
enableLLM: false,
maxConcurrentRequests: 10,
};
const server = createDesignPatternsServer(config);
expect(server).toBeDefined();
expect(typeof server.initialize).toBe('function');
expect(typeof server.start).toBe('function');
expect(typeof server.stop).toBe('function');
});
test('should parse environment variables correctly', () => {
process.env.DATABASE_PATH = '/custom/path.db';
process.env.LOG_LEVEL = 'debug';
process.env.ENABLE_LLM = 'true';
process.env.MAX_CONCURRENT_REQUESTS = '20';
// Test that env vars are parsed (this would be in main function)
const config = {
databasePath: process.env.DATABASE_PATH || './data/design-patterns.db',
logLevel: (process.env.LOG_LEVEL as any) || 'info',
enableLLM: process.env.ENABLE_LLM === 'true',
maxConcurrentRequests: parseInt(process.env.MAX_CONCURRENT_REQUESTS || '10'),
};
expect(config.databasePath).toBe('/custom/path.db');
expect(config.logLevel).toBe('debug');
expect(config.enableLLM).toBe(true);
expect(config.maxConcurrentRequests).toBe(20);
});
test('should use default values when env vars not set', () => {
const config = {
databasePath: process.env.DATABASE_PATH || './data/design-patterns.db',
logLevel: (process.env.LOG_LEVEL as any) || 'info',
enableLLM: process.env.ENABLE_LLM === 'true',
maxConcurrentRequests: parseInt(process.env.MAX_CONCURRENT_REQUESTS || '10'),
};
expect(config.databasePath).toBe('./data/design-patterns.db');
expect(config.logLevel).toBe('info');
expect(config.enableLLM).toBe(false);
expect(config.maxConcurrentRequests).toBe(10);
});
test('should handle invalid MAX_CONCURRENT_REQUESTS', () => {
process.env.MAX_CONCURRENT_REQUESTS = 'invalid';
const maxConcurrentRequests = parseInt(process.env.MAX_CONCURRENT_REQUESTS || '10');
const config = {
databasePath: process.env.DATABASE_PATH || './data/design-patterns.db',
logLevel: (process.env.LOG_LEVEL as any) || 'info',
enableLLM: process.env.ENABLE_LLM === 'true',
maxConcurrentRequests: isNaN(maxConcurrentRequests) ? 10 : Math.max(1, maxConcurrentRequests),
};
expect(config.maxConcurrentRequests).toBe(10); // Should fall back to default
});
test('should handle different log levels from env', () => {
const levels = ['debug', 'info', 'warn', 'error'];
levels.forEach(level => {
process.env.LOG_LEVEL = level;
const config = {
databasePath: process.env.DATABASE_PATH || './data/design-patterns.db',
logLevel: (process.env.LOG_LEVEL as any) || 'info',
enableLLM: process.env.ENABLE_LLM === 'true',
maxConcurrentRequests: parseInt(process.env.MAX_CONCURRENT_REQUESTS || '10'),
};
expect(config.logLevel).toBe(level);
});
});
});
