node/test/parallel/test-pipe-return-val.js

'use strict';
// This test ensures SourceStream.pipe(DestStream) returns DestStream

require('../common');
const Stream = require('stream').Stream;
const assert = require('assert');

const sourceStream = new Stream();
const destStream = new Stream();
const result = sourceStream.pipe(destStream);

assert.strictEqual(result, destStream);