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'use strict';
require('../common');
const assert = require('assert');
const zlib = require('zlib');
const fixtures = require('../common/fixtures');
const file = fixtures.readSync('person.jpg');
const chunkSize = 12 * 1024;
const opts = { level: 9, strategy: zlib.constants.Z_DEFAULT_STRATEGY };
const deflater = zlib.createDeflate(opts);
const chunk1 = file.slice(0, chunkSize);
const chunk2 = file.slice(chunkSize);
const blkhdr = Buffer.from([0x00, 0x5a, 0x82, 0xa5, 0x7d]);
const expected = Buffer.concat([blkhdr, chunk2]);
let actual;
deflater.write(chunk1, function() {
deflater.params(0, zlib.constants.Z_DEFAULT_STRATEGY, function() {
while (deflater.read());
deflater.end(chunk2, function() {
const bufs = [];
let buf;
while (buf = deflater.read())
bufs.push(buf);
actual = Buffer.concat(bufs);
});
});
while (deflater.read());
});
process.once('exit', function() {
assert.deepStrictEqual(actual, expected);
});
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