MCP Time Server Node

import { EventEmitter } from 'events'; import { configureServer, getMaxListenersConfig } from '../../src/utils/serverConfig'; describe('serverConfig environment variable support', () => { const originalEnv = process.env; const originalDefaultMaxListeners = EventEmitter.defaultMaxListeners; const originalProcessMaxListeners = process.getMaxListeners(); beforeEach(() => { // Reset to defaults before each test EventEmitter.defaultMaxListeners = 10; process.setMaxListeners(10); // Clear module cache to ensure fresh import jest.resetModules(); }); afterEach(() => { // Restore original values process.env = originalEnv; EventEmitter.defaultMaxListeners = originalDefaultMaxListeners; process.setMaxListeners(originalProcessMaxListeners); }); describe('MAX_LISTENERS environment variable', () => { test('should use MAX_LISTENERS from environment when set', () => { // Arrange process.env.MAX_LISTENERS = '30'; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(30); expect(config.processMaxListeners).toBe(30); }); test('should use default value (20) when MAX_LISTENERS not set', () => { // Arrange delete process.env.MAX_LISTENERS; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(20); expect(config.processMaxListeners).toBe(20); }); test('should handle invalid MAX_LISTENERS gracefully', () => { // Arrange process.env.MAX_LISTENERS = 'invalid'; // Act configureServer(); // Assert - should fall back to default const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(20); expect(config.processMaxListeners).toBe(20); }); test('should enforce minimum value of 10', () => { // Arrange process.env.MAX_LISTENERS = '5'; // Act configureServer(); // Assert - should use minimum of 10 const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(10); expect(config.processMaxListeners).toBe(10); }); test('should handle very large values', () => { // Arrange process.env.MAX_LISTENERS = '100'; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(100); expect(config.processMaxListeners).toBe(100); }); test('should handle zero as invalid and use default', () => { // Arrange process.env.MAX_LISTENERS = '0'; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(20); expect(config.processMaxListeners).toBe(20); }); test('should handle negative values as invalid', () => { // Arrange process.env.MAX_LISTENERS = '-10'; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(20); expect(config.processMaxListeners).toBe(20); }); test('should parse decimal values as integers', () => { // Arrange process.env.MAX_LISTENERS = '25.7'; // Act configureServer(); // Assert const config = getMaxListenersConfig(); expect(config.defaultMaxListeners).toBe(25); expect(config.processMaxListeners).toBe(25); }); }); });