test-zlib-write-after-flush.js

// Copyright Joyent, Inc. and other Node contributors.
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//
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'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);
    assert.strictEqual(gzip._nextFlush, -1);
  }));

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