node/test/parallel/test-unicode-node-options.js

'use strict';
// Flags: --expose-internals
const common = require('../common');
const { getOptionValue } = require('internal/options');
const assert = require('assert');
const cp = require('child_process');

if (process.config.variables.node_without_node_options) {
  common.skip('missing NODE_OPTIONS support');
}

const expected_redirect_value = 'foó';

if (process.argv.length === 2) {
  const NODE_OPTIONS = `--redirect-warnings=${expected_redirect_value}`;
  const result = cp.spawnSync(process.argv0,
                              ['--expose-internals', __filename, 'test'],
                              {
                                env: {
                                  ...process.env,
                                  NODE_OPTIONS
                                },
                                stdio: 'inherit'
                              });
  assert.strictEqual(result.status, 0);
} else {
  const redirect_value = getOptionValue('--redirect-warnings');
  console.log(`--redirect-warings=${redirect_value}`);
  assert.strictEqual(redirect_value, expected_redirect_value);
}