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

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
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//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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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');

// Must be a multiple of 4 characters in total to test all ArrayBufferView
// types.
const expectStr = 'blah'.repeat(8);
const expectBuf = Buffer.from(expectStr);

const opts = {
  level: 9,
  chunkSize: 1024,
};

for (const [type, expect] of [
  ['string', expectStr],
  ['Buffer', expectBuf],
  ...common.getArrayBufferViews(expectBuf).map((obj) =>
    [obj[Symbol.toStringTag], obj]
  )
]) {
  for (const method of [
    ['gzip', 'gunzip'],
    ['gzip', 'unzip'],
    ['deflate', 'inflate'],
    ['deflateRaw', 'inflateRaw'],
  ]) {
    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.`);
    }
  }
}