test/parallel/test-zlib-write-after-flush.js

// 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 zlib = require('zlib');

for (const [ createCompress, createDecompress ] of [
  [ zlib.createGzip, zlib.createGunzip ],
  [ zlib.createBrotliCompress, zlib.createBrotliDecompress ],
]) {
  const gzip = createCompress();
  const gunz = createDecompress();

  gzip.pipe(gunz);

  let output = '';
  const input = 'A line of data\n';
  gunz.setEncoding('utf8');
  gunz.on('data', (c) => output += c);
  gunz.on('end', common.mustCall(() => {
    assert.strictEqual(output, input);
  }));

  // Make sure that flush/write doesn't trigger an assert failure
  gzip.flush();
  gzip.write(input);
  gzip.end();
  gunz.read(0);
}