'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const { run } = require('../src/cli');

class Sink {
  constructor() { this.chunks = []; }
  write(s) { this.chunks.push(s); }
  get text() { return this.chunks.join(''); }
}

test('cli: no args prints usage to stderr, exit 1', () => {
  const out = new Sink(); const err = new Sink();
  const code = run([], { out, err });
  assert.equal(code, 1);
  assert.match(err.text, /usage/i);
  assert.match(err.text, /encode/);
  assert.match(err.text, /decode/);
  assert.match(err.text, /build/);
  assert.match(err.text, /inspect/);
  assert.equal(out.text, '');
});

test('cli: --help prints usage to stdout, exit 0', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['--help'], { out, err });
  assert.equal(code, 0);
  assert.match(out.text, /usage/i);
  assert.equal(err.text, '');
});

test('cli: -h alias for --help', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['-h'], { out, err });
  assert.equal(code, 0);
  assert.match(out.text, /usage/i);
});

test('cli: unknown subcommand goes to stderr, exit 1', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['frobnicate'], { out, err });
  assert.equal(code, 1);
  assert.match(err.text, /unknown subcommand/i);
  assert.match(err.text, /frobnicate/);
});