text: // deno-fmt-ignore-file
  // deno-lint-ignore-file
  
  // Copyright Joyent and Node contributors. All rights reserved. MIT license.
  // Taken from Node 16.13.0
  // This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
  
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  'use strict';
  require('../common');
  const { Readable: R, Writable: W } = require('stream');
  const assert = require('assert');
  
  const src = new R({ encoding: 'base64' });
  const dst = new W();
  let hasRead = false;
  const accum = [];
  
  src._read = function(n) {
    if (!hasRead) {
      hasRead = true;
      process.nextTick(function() {
        src.push(Buffer.from('1'));
        src.push(null);
      });
    }
  };
  
  dst._write = function(chunk, enc, cb) {
    accum.push(chunk);
    cb();
  };
  
  src.on('end', function() {
    assert.strictEqual(String(Buffer.concat(accum)), 'MQ==');
    clearTimeout(timeout);
  });
  
  src.pipe(dst);
  
  const timeout = setTimeout(function() {
    assert.fail('timed out waiting for _write');
  }, 100);
  