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// 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
// 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';const common = require('../common');const assert = require('assert');const { Readable, Writable } = require('stream');
class TestReadable extends Readable {  constructor(opt) {    super(opt);    this._ended = false;  }
  _read() {    if (this._ended)      this.emit('error', new Error('_read called twice'));    this._ended = true;    this.push(null);  }}
class TestWritable extends Writable {  constructor(opt) {    super(opt);    this._written = [];  }
  _write(chunk, encoding, cb) {    this._written.push(chunk);    cb();  }}
// This one should not emit 'end' until we read() from it later.const ender = new TestReadable();
// What happens when you pipe() a Readable that's already ended?const piper = new TestReadable();// pushes EOF null, and length=0, so this will trigger 'end'piper.read();
setTimeout(common.mustCall(function() {  ender.on('end', common.mustCall());  const c = ender.read();  assert.strictEqual(c, null);
  const w = new TestWritable();  w.on('finish', common.mustCall());  piper.pipe(w);}), 1);