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import { describe, it, expect } from 'vitest'; import { echoImplementation } from '../echo.js'; describe('Echo Tool', () => { it('should echo the message', async () => { const result = await echoImplementation({ message: 'Hello, World!', }); expect(result.echo).toBe('Hello, World!'); }); it('should include timestamp', async () => { const result = await echoImplementation({ message: 'Test message', }); expect(result.timestamp).toBeDefined(); expect(new Date(result.timestamp).toString()).not.toBe('Invalid Date'); }); it('should throw error when message is missing', async () => { await expect(echoImplementation({})).rejects.toThrow('message parameter is required'); }); it('should handle empty string message', async () => { await expect( echoImplementation({ message: '', }) ).rejects.toThrow('message parameter is required'); }); });