ReddRadar
Agent skill
terminal-emulator
Test interactive CLI/TUI applications using @microsoft/tui-test. Use when you need to test CLI tools with interactive prompts, TUI rendering, arrow key navigation, or any command that requires a TTY. Triggers include "test CLI", "test TUI", "run interactively", "automate terminal input", "simulate user input in terminal".
Install this agent skill to your Project
npx add-skill https://github.com/slopus/happy/tree/main/.claude/skills/terminal-emulator
SKILL.md
Testing Interactive CLI / TUI with @microsoft/tui-test
Playwright-like API for terminals. Real PTY per test. Made by Microsoft.
- GitHub: https://github.com/microsoft/tui-test
- npm:
@microsoft/tui-test
Install
yarn add -D @microsoft/tui-test
Usage
import { test, expect } from '@microsoft/tui-test';
test.use({ program: { file: 'node', args: ['./my-cli.js'] } });
test('selects option and proceeds', async ({ terminal }) => {
await expect(terminal.getByText('Select an option')).toBeVisible();
await terminal.write('\x1B[B'); // Arrow Down
await terminal.submit(); // Enter
await expect(terminal.getByText('Option 2 selected')).toBeVisible();
});
test('matches snapshot', async ({ terminal }) => {
await expect(terminal).toMatchSnapshot();
});
API
// Navigation
await terminal.write('\x1B[A'); // Arrow Up
await terminal.write('\x1B[B'); // Arrow Down
await terminal.write('\x1B[C'); // Arrow Right
await terminal.write('\x1B[D'); // Arrow Left
await terminal.submit(); // Enter
await terminal.write('\t'); // Tab
await terminal.write('\x03'); // Ctrl+C
await terminal.write('\x1B'); // Escape
await terminal.write('\x7F'); // Backspace
await terminal.write('hello'); // Type text
// Assertions
await expect(terminal.getByText('pattern')).toBeVisible();
await expect(terminal.getByText('pattern', { full: true })).toBeVisible();
await expect(terminal).toMatchSnapshot();
// Reading
const content = terminal.content; // Full terminal content as string
Running
npx tui-test # Run all tests
npx tui-test --update-snapshots # Update snapshots
npx tui-test my-test.ts # Run specific test
Reference
- Used by VS Code terminal team
- Real PTY isolation per test (no mocking)
- Auto-waits for terminal renders
- Cross-platform (macOS, Linux, Windows)
- Snapshot testing built-in
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