Function test

test/parallel/test-env-var-no-warnings.js:9–21

(newEnv)

  process.emitWarning('foo');
} else {
  function test(newEnv) {
    const [cmd, opts] = common.escapePOSIXShell`"${process.execPath}" "${__filename}" child`;

    cp.exec(cmd, { ...opts, env: { ...opts?.env, ...newEnv } }, common.mustCall((err, stdout, stderr) => {
      assert.strictEqual(err, null);
      assert.strictEqual(stdout, '');

      if (newEnv.NODE_NO_WARNINGS === '1')
        assert.strictEqual(stderr, '');
      else
        assert.match(stderr.trim(), /Warning: foo\n/);
    }));
  }

  test({});
  test(process.env);