test/parallel/test-zlib-zero-byte.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';

const common = require('../common');

const assert = require('node:assert');
const zlib = require('node:zlib');

const compressors = [
  [zlib.Gzip, 20],
  [zlib.BrotliCompress, 1],
  [zlib.ZstdCompress, 9],
];

for (const [Compressor, expected] of compressors) {
  const gz = new Compressor();
  const emptyBuffer = Buffer.alloc(0);
  let received = 0;
  gz.on('data', function(c) {
    received += c.length;
  });
  gz.on('error', common.mustNotCall());
  gz.on('end', common.mustCall(() => {
    assert.strictEqual(received, expected,
                       `${received}, ${expected}, ${Compressor.name}`);
  }));
  gz.write(emptyBuffer);
  gz.end();
}