// deno-fmt-ignore-file
// deno-lint-ignore-file

// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by `tests/node_compat/runner/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,
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// 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.
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'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);