test/parallel/test-stream-readable-next-no-null.js

'use strict';
const { mustNotCall, expectsError } = require('../common');
const { Readable } = require('stream');

async function* generate() {
  yield null;
}

const stream = Readable.from(generate());

stream.on('error', expectsError({
  code: 'ERR_STREAM_NULL_VALUES',
  name: 'TypeError',
  message: 'May not write null values to stream'
}));

stream.on('data', mustNotCall());

stream.on('end', mustNotCall());