Consult LLM MCP

import { describe, it, expect, vi, beforeEach } from 'vitest' import { generateGitDiff } from './git.js' const execSyncMock = vi.hoisted(() => vi.fn()) vi.mock('child_process', () => ({ execSync: execSyncMock, })) beforeEach(() => { execSyncMock.mockReset() }) describe('generateGitDiff', () => { it('returns an error string when no files are provided', () => { const result = generateGitDiff(undefined, []) expect(result).toContain('Error generating git diff') expect(result).toContain('No files specified for git diff') }) it('executes git diff with the expected command and options', () => { execSyncMock.mockReturnValueOnce('diff output') const result = generateGitDiff('/repo', ['a.ts', 'b.ts'], 'main') expect(execSyncMock).toHaveBeenCalledWith('git diff main -- a.ts b.ts', { cwd: '/repo', encoding: 'utf-8', maxBuffer: 1024 * 1024, }) expect(result).toBe('diff output') }) it('uses process.cwd() by default when repo path is missing', () => { const cwd = process.cwd() execSyncMock.mockReturnValueOnce('diff output') generateGitDiff(undefined, ['c.ts']) expect(execSyncMock).toHaveBeenCalledWith('git diff HEAD -- c.ts', { cwd, encoding: 'utf-8', maxBuffer: 1024 * 1024, }) }) it('wraps git errors with a helpful prefix', () => { execSyncMock.mockImplementationOnce(() => { throw new Error('boom') }) const result = generateGitDiff('/repo', ['a.ts']) expect(result).toContain('Error generating git diff: boom') }) })