var common = require('../common.js'); var assert = require('assert'); var zlib = require('zlib'); var path = require('path'); var fs = require('fs'); var file = fs.readFileSync(path.resolve(common.fixturesDir, 'person.jpg')), chunkSize = 16, opts = { level: 0 }, deflater = zlib.createDeflate(opts); var chunk = file.slice(0, chunkSize), expectedNone = new Buffer([0x78, 0x01]), blkhdr = new Buffer([0x00, 0x10, 0x00, 0xef, 0xff]), adler32 = new Buffer([0x00, 0x00, 0x00, 0xff, 0xff]), expectedFull = Buffer.concat([blkhdr, chunk, adler32]), actualNone, actualFull; deflater.write(chunk, function() { deflater.flush(zlib.Z_NO_FLUSH, function() { actualNone = deflater.read(); deflater.flush(function() { var bufs = [], buf; while (buf = deflater.read()) bufs.push(buf); actualFull = Buffer.concat(bufs); }); }); }); process.once('exit', function() { assert.deepEqual(actualNone, expectedNone); assert.deepEqual(actualFull, expectedFull); });