cli-e2e-test-harness

# CLI E2E Test Harness Set up E2E test harness for CLI applications. ## Generated Patterns ```typescript import { spawn, SpawnOptions } from 'child_process'; interface CLIResult { stdout: string; stderr: string; exitCode: number | null; } export async function runCLI(args: string[], options?: SpawnOptions): Promise<CLIResult> { return new Promise((resolve) => { const proc = spawn('node', ['./dist/index.js', ...args], { env: { ...process.env, NO_COLOR: '1' }, ...options, }); let stdout = ''; let stderr = ''; proc.stdout?.on('data', (data) => { stdout += data; }); proc.stderr?.on('data', (data) => { stderr += data; }); proc.on('close', (exitCode) => { resolve({ stdout, stderr, exitCode }); }); }); } export function expectOutput(result: CLIResult) { return { toContain: (text: string) => expect(result.stdout).toContain(text), toMatchSnapshot: () => expect(result.stdout).toMatchSnapshot(), toExitWith: (code: number) => expect(result.exitCode).toBe(code), }; } ``` ## Target Processes - cli-unit-integration-testing - mcp-server-testing-suite