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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 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';const common = require('../common');if (!common.hasCrypto)  common.skip('missing crypto');
const assert = require('assert');const crypto = require('crypto');const stream = require('stream');const zlib = require('zlib');
const Stream = stream.Stream;
// Emit random bytes, and keep a shasumclass RandomReadStream extends Stream {  constructor(opt) {    super();
    this.readable = true;    this._paused = false;    this._processing = false;
    this._hasher = crypto.createHash('sha1');    opt = opt || {};
    // base block size.    opt.block = opt.block || 256 * 1024;
    // Total number of bytes to emit    opt.total = opt.total || 256 * 1024 * 1024;    this._remaining = opt.total;
    // How variable to make the block sizes    opt.jitter = opt.jitter || 1024;
    this._opt = opt;
    this._process = this._process.bind(this);
    process.nextTick(this._process);  }
  pause() {    this._paused = true;    this.emit('pause');  }
  resume() {    // console.error("rrs resume");    this._paused = false;    this.emit('resume');    this._process();  }
  _process() {    if (this._processing) return;    if (this._paused) return;
    this._processing = true;
    if (!this._remaining) {      this._hash = this._hasher.digest('hex').toLowerCase().trim();      this._processing = false;
      this.emit('end');      return;    }
    // Figure out how many bytes to output    // if finished, then just emit end.    let block = this._opt.block;    const jitter = this._opt.jitter;    if (jitter) {      block += Math.ceil(Math.random() * jitter - (jitter / 2));    }    block = Math.min(block, this._remaining);    const buf = Buffer.allocUnsafe(block);    for (let i = 0; i < block; i++) {      buf[i] = Math.random() * 256;    }
    this._hasher.update(buf);
    this._remaining -= block;
    this._processing = false;
    this.emit('data', buf);    process.nextTick(this._process);  }}
// A filter that just verifies a shasumclass HashStream extends Stream {  constructor() {    super();    this.readable = this.writable = true;    this._hasher = crypto.createHash('sha1');  }
  write(c) {    // Simulate the way that an fs.ReadStream returns false    // on *every* write, only to resume a moment later.    this._hasher.update(c);    process.nextTick(() => this.resume());    return false;  }
  resume() {    this.emit('resume');    process.nextTick(() => this.emit('drain'));  }
  end(c) {    if (c) {      this.write(c);    }    this._hash = this._hasher.digest('hex').toLowerCase().trim();    this.emit('data', this._hash);    this.emit('end');  }}
for (const [ createCompress, createDecompress ] of [  [ zlib.createGzip, zlib.createGunzip ],  // TODO(kt3k): Enable this when we support brotli in zlib  // [ zlib.createBrotliCompress, zlib.createBrotliDecompress ],]) {  const inp = new RandomReadStream({ total: 1024, block: 256, jitter: 16 });  const out = new HashStream();  const gzip = createCompress();  const gunz = createDecompress();
  inp.pipe(gzip).pipe(gunz).pipe(out);
  out.on('data', common.mustCall((c) => {    assert.strictEqual(c, inp._hash, `Hash '${c}' equals '${inp._hash}'.`);  }));}