1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const common = require('../common');const assert = require('assert');const { Readable } = require('stream');
// Verify that .push() and .unshift() can be called from 'data' listeners.
for (const method of ['push', 'unshift']) {  const r = new Readable({ read() {} });  r.once('data', common.mustCall((chunk) => {    assert.strictEqual(r.readableLength, 0);    r[method](chunk);    assert.strictEqual(r.readableLength, chunk.length);
    r.on('data', common.mustCall((chunk) => {      assert.strictEqual(chunk.toString(), 'Hello, world');    }));  }));
  r.push('Hello, world');}