node/test/parallel/test-child-process-fork-options.js

'use strict';
const common = require('../common');
const fixtures = require('../common/fixtures');

// This test ensures that fork should parse options
// correctly if args is undefined or null

const assert = require('assert');
const { fork } = require('child_process');

const expectedEnv = { foo: 'bar' };

{
  const cp = fork(fixtures.path('child-process-echo-options.js'), undefined,
                  { env: Object.assign({}, process.env, expectedEnv) });

  cp.on('message', common.mustCall(({ env }) => {
    assert.strictEqual(env.foo, expectedEnv.foo);
  }));

  cp.on('exit', common.mustCall((code) => {
    assert.strictEqual(code, 0);
  }));
}

{
  const cp = fork(fixtures.path('child-process-echo-options.js'), null,
                  { env: Object.assign({}, process.env, expectedEnv) });

  cp.on('message', common.mustCall(({ env }) => {
    assert.strictEqual(env.foo, expectedEnv.foo);
  }));

  cp.on('exit', common.mustCall((code) => {
    assert.strictEqual(code, 0);
  }));
}