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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 = 16;
const opts = { level: 0 };
const deflater = zlib.createDeflate(opts);
const chunk = file.slice(0, chunkSize);
const expectedNone = Buffer.from([0x78, 0x01]);
const blkhdr = Buffer.from([0x00, 0x10, 0x00, 0xef, 0xff]);
const adler32 = Buffer.from([0x00, 0x00, 0x00, 0xff, 0xff]);
const expectedFull = Buffer.concat([blkhdr, chunk, adler32]);
let actualNone;
let actualFull;
deflater.write(chunk, function() {
deflater.flush(zlib.constants.Z_NO_FLUSH, function() {
actualNone = deflater.read();
deflater.flush(function() {
const bufs = [];
let buf;
while (buf = deflater.read())
bufs.push(buf);
actualFull = Buffer.concat(bufs);
});
});
});
process.once('exit', function() {
assert.deepStrictEqual(actualNone, expectedNone);
assert.deepStrictEqual(actualFull, expectedFull);
});