text: 'use strict';
  require('../common');
  const zlib = require('zlib');
  const { inspect, promisify } = require('util');
  const assert = require('assert');
  const emptyBuffer = Buffer.alloc(0);
  
  (async function() {
    for (const [ compress, decompress, method ] of [
      [ zlib.deflateRawSync, zlib.inflateRawSync, 'raw sync' ],
      [ zlib.deflateSync, zlib.inflateSync, 'deflate sync' ],
      [ zlib.gzipSync, zlib.gunzipSync, 'gzip sync' ],
      [ promisify(zlib.deflateRaw), promisify(zlib.inflateRaw), 'raw' ],
      [ promisify(zlib.deflate), promisify(zlib.inflate), 'deflate' ],
      [ promisify(zlib.gzip), promisify(zlib.gunzip), 'gzip' ]
    ]) {
      const compressed = await compress(emptyBuffer);
      const decompressed = await decompress(compressed);
      assert.deepStrictEqual(
        emptyBuffer, decompressed,
        `Expected ${inspect(compressed)} to match ${inspect(decompressed)} ` +
        `to match for ${method}`);
    }
  })();
  