Filesystem MCP Server

import { describe, it, expect, vi, beforeEach } from 'vitest'; import fs from 'fs/promises'; import { handlers } from '../src/handlers/compare.js'; import { setAllowedDirectories } from '../src/lib.js'; // Mock fs and logger vi.mock('fs/promises'); vi.mock('../src/logger.js', () => ({ logger: { info: vi.fn(), error: vi.fn(), }, })); const mockFs = fs as any; describe('file_compare', () => { beforeEach(() => { setAllowedDirectories(['/tmp']); mockFs.realpath.mockImplementation((p: string) => Promise.resolve(p)); }); it('should compare two identical files', async () => { const mockContent = 'line1\nline2\nline3'; (fs.readFile as any).mockResolvedValue(mockContent); const result = await handlers.compare({ type: 'text', path1: '/tmp/file1.txt', path2: '/tmp/file2.txt' }); expect(result.content[0].text).toContain('Index: /tmp/file1.txt'); expect(result.content[0].text).toContain('original'); expect(result.content[0].text).toContain('modified'); }); it('should compare two different files', async () => { const content1 = 'line1\nline2\nline3'; const content2 = 'line1\nchanged\nline3'; (fs.readFile as any).mockImplementation((path: string) => { if (path === '/tmp/file1.txt') return Promise.resolve(content1); if (path === '/tmp/file2.txt') return Promise.resolve(content2); throw new Error('File not found'); }); const result = await handlers.compare({ type: 'text', path1: '/tmp/file1.txt', path2: '/tmp/file2.txt' }); expect(result.content[0].text).toContain('+changed'); expect(result.content[0].text).toContain('-line2'); }); it('should throw error for invalid path', async () => { await expect(handlers.compare({ type: 'text', path1: '/invalid/path', path2: '/tmp/file2.txt' })).rejects.toThrow('Access denied'); }); });