node/test/parallel/test-zlib-convenience-methods.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
// test convenience methods with and without options supplied

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

const expectStr = 'blahblahblahblahblahblah';
const expectBuf = Buffer.from(expectStr);
const expectUint8Array = new Uint8Array(expectBuf);
const opts = {
  level: 9,
  chunkSize: 1024,
};

for (const method of [
  ['gzip', 'gunzip'],
  ['gzip', 'unzip'],
  ['deflate', 'inflate'],
  ['deflateRaw', 'inflateRaw'],
]) {
  for (const [type, expect] of [
    ['string', expectStr],
    ['Buffer', expectBuf],
    ['Uint8Array', expectUint8Array]
  ]) {
    zlib[method[0]](expect, opts, common.mustCall((err, result) => {
      zlib[method[1]](result, opts, common.mustCall((err, result) => {
        assert.strictEqual(result.toString(), expectStr,
                           `Should get original string after ${method[0]}/` +
                           `${method[1]} ${type} with options.`);
      }));
    }));

    zlib[method[0]](expect, common.mustCall((err, result) => {
      zlib[method[1]](result, common.mustCall((err, result) => {
        assert.strictEqual(result.toString(), expectStr,
                           `Should get original string after ${method[0]}/` +
                           `${method[1]} ${type} without options.`);
      }));
    }));

    {
      const compressed = zlib[method[0] + 'Sync'](expect, opts);
      const decompressed = zlib[method[1] + 'Sync'](compressed, opts);
      assert.strictEqual(decompressed.toString(), expectStr,
                         `Should get original string after ${method[0]}Sync/` +
                         `${method[1]}Sync ${type} with options.`);
    }


    {
      const compressed = zlib[method[0] + 'Sync'](expect);
      const decompressed = zlib[method[1] + 'Sync'](compressed);
      assert.strictEqual(decompressed.toString(), expectStr,
                         `Should get original string after ${method[0]}Sync/` +
                         `${method[1]}Sync ${type} without options.`);
    }
  }
}