bitcore/test/encoding/bufferreader.js at master · pinkmagicdev/bitcore · GitHub

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'use strict';

var should = require('chai').should();

var bitcore = require('../..');

var BufferWriter = bitcore.encoding.BufferWriter;

var BufferReader = bitcore.encoding.BufferReader;

var BN = bitcore.crypto.BN;

describe('BufferReader', function() {

it('should make a new BufferReader', function() {

var br = new BufferReader();

should.exist(br);

br = BufferReader();

should.exist(br);

});

it('should create a new bufferreader with a buffer', function() {

var buf = new Buffer(0);

var br = new BufferReader(buf);

should.exist(br);

Buffer.isBuffer(br.buf).should.equal(true);

});

it('should fail for invalid object', function() {

var fail = function() {

return new BufferReader(5);

};

fail.should.throw('Unrecognized argument for BufferReader');

});

describe('#set', function() {

it('should set pos', function() {

should.exist(BufferReader().set({

pos: 1

}).pos);

});

describe('#eof', function() {

it('should return true for a blank br', function() {

var br = new BufferReader(new Buffer([]));

br.finished().should.equal(true);

});

describe('read', function() {

it('should return the same buffer', function() {

var buf = new Buffer([0]);

var br = new BufferReader(buf);

br.readAll().toString('hex').should.equal(buf.toString('hex'));

});

it('should return a buffer of this length', function() {

var buf = new Buffer(10);

buf.fill(0);

var br = new BufferReader(buf);

var buf2 = br.read(2);

buf2.length.should.equal(2);

br.finished().should.equal(false);

br.pos.should.equal(2);

});

it('should work with 0 length', function() {

var buf = new Buffer(10);

buf.fill(1);

var br = new BufferReader(buf);

var buf2 = br.read(0);

buf2.length.should.equal(0);

br.finished().should.equal(false);

buf2.toString('hex').should.equal('');

});

describe('readVarLengthBuffer', function() {

it('returns correct buffer', function() {

var buf = new Buffer('73010000003766404f00000000b305434f00000000f203' +

'0000f1030000001027000048ee00000064000000004653656520626974636f696' +

'e2e6f72672f666562323020696620796f7520686176652074726f75626c652063' +

'6f6e6e656374696e6720616674657220323020466562727561727900473045022' +

'1008389df45f0703f39ec8c1cc42c13810ffcae14995bb648340219e353b63b53' +

'eb022009ec65e1c1aaeec1fd334c6b684bde2b3f573060d5b70c3a46723326e4e' +

'8a4f1', 'hex');

var br = new BufferReader(buf);

var b1 = br.readVarLengthBuffer();

b1.toString('hex').should.equal('010000003766404f00000000b305434f000' +

'00000f2030000f1030000001027000048ee000000640000000046536565206269' +

'74636f696e2e6f72672f666562323020696620796f7520686176652074726f756' +

'26c6520636f6e6e656374696e6720616674657220323020466562727561727900');

var b2 = br.readVarLengthBuffer();

b2.toString('hex').should.equal('30450221008389df45f0703f39ec8c1cc42' +

'c13810ffcae14995bb648340219e353b63b53eb022009ec65e1c1aaeec1fd334c' +

'6b684bde2b3f573060d5b70c3a46723326e4e8a4f1');

});

it('fails on length too big', function() {

var buf = new Buffer('0a00', 'hex');

var br = new BufferReader(buf);

br.readVarLengthBuffer.bind(br).should.throw('Invalid length while reading varlength buffer');

});

describe('#readUInt8', function() {

it('should return 1', function() {

var buf = new Buffer(1);

buf.writeUInt8(1, 0);

var br = new BufferReader(buf);

br.readUInt8().should.equal(1);

});

describe('#readUInt16BE', function() {

it('should return 1', function() {

var buf = new Buffer(2);

buf.writeUInt16BE(1, 0);

var br = new BufferReader(buf);

br.readUInt16BE().should.equal(1);

});

describe('#readUInt16LE', function() {

it('should return 1', function() {

var buf = new Buffer(2);

buf.writeUInt16LE(1, 0);

var br = new BufferReader(buf);

br.readUInt16LE().should.equal(1);

});

describe('#readUInt32BE', function() {

it('should return 1', function() {

var buf = new Buffer(4);

buf.writeUInt32BE(1, 0);

var br = new BufferReader(buf);

br.readUInt32BE().should.equal(1);

});

describe('#readUInt32LE', function() {

it('should return 1', function() {

var buf = new Buffer(4);

buf.writeUInt32LE(1, 0);

var br = new BufferReader(buf);

br.readUInt32LE().should.equal(1);

});

describe('#readUInt64BEBN', function() {

it('should return 1', function() {

var buf = new Buffer(8);

buf.fill(0);

buf.writeUInt32BE(1, 4);

var br = new BufferReader(buf);

br.readUInt64BEBN().toNumber().should.equal(1);

});

it('should return 2^64', function() {

var buf = new Buffer(8);

buf.fill(0xff);

var br = new BufferReader(buf);

br.readUInt64BEBN().toNumber().should.equal(Math.pow(2, 64));

});

describe('#readUInt64LEBN', function() {

it('should return 1', function() {

var buf = new Buffer(8);

buf.fill(0);

buf.writeUInt32LE(1, 0);

var br = new BufferReader(buf);

br.readUInt64LEBN().toNumber().should.equal(1);

});

it('should return 10BTC', function() {

var tenbtc = 10 * 1e8;

var tenbtcBuffer = new Buffer('00ca9a3b00000000', 'hex');

var br = new BufferReader(tenbtcBuffer);

br.readUInt64LEBN().toNumber().should.equal(tenbtc);

});

it('should return 2^30', function() {

var buf = new Buffer(8);

buf.fill(0);

buf.writeUInt32LE(Math.pow(2, 30), 0);

var br = new BufferReader(buf);

br.readUInt64LEBN().toNumber().should.equal(Math.pow(2, 30));

});

it('should return 2^32 + 1', function() {

var num = Math.pow(2, 32) + 1;

var numBuffer = new Buffer('0100000001000000', 'hex');

var br = new BufferReader(numBuffer);

br.readUInt64LEBN().toNumber().should.equal(num);

});

it('should return max number of satoshis', function() {

var maxSatoshis = 21000000 * 1e8;

var maxSatoshisBuffer = new Buffer('0040075af0750700', 'hex');

var br = new BufferReader(maxSatoshisBuffer);

br.readUInt64LEBN().toNumber().should.equal(maxSatoshis);

});

it('should return 2^53 - 1', function() {

var maxSafe = Math.pow(2, 53) - 1;

var maxSafeBuffer = new Buffer('ffffffffffff1f00', 'hex');

var br = new BufferReader(maxSafeBuffer);

br.readUInt64LEBN().toNumber().should.equal(maxSafe);

});

it('should return 2^53', function() {

var bn = new BN('20000000000000', 16);

var bnBuffer = new Buffer('0000000000002000', 'hex');

var br = new BufferReader(bnBuffer);

var readbn = br.readUInt64LEBN();

readbn.cmp(bn).should.equal(0);

});

it('should return 0', function() {

var buf = new Buffer(8);

buf.fill(0);

var br = new BufferReader(buf);

br.readUInt64LEBN().toNumber().should.equal(0);

});

it('should return 2^64', function() {

var buf = new Buffer(8);

buf.fill(0xff);

var br = new BufferReader(buf);

br.readUInt64LEBN().toNumber().should.equal(Math.pow(2, 64));

});

describe('#readVarintBuf', function() {

it('should read a 1 byte varint', function() {

var buf = new Buffer([50]);

var br = new BufferReader(buf);

br.readVarintBuf().length.should.equal(1);

});

it('should read a 3 byte varint', function() {

var buf = new Buffer([253, 253, 0]);

var br = new BufferReader(buf);

br.readVarintBuf().length.should.equal(3);

});

it('should read a 5 byte varint', function() {

var buf = new Buffer([254, 0, 0, 0, 0]);

buf.writeUInt32LE(50000, 1);

var br = new BufferReader(buf);

br.readVarintBuf().length.should.equal(5);

});

it('should read a 9 byte varint', function() {

var buf = BufferWriter().writeVarintBN(new BN(Math.pow(2, 54).toString())).concat();

var br = new BufferReader(buf);

br.readVarintBuf().length.should.equal(9);

});

describe('#readVarintNum', function() {

it('should read a 1 byte varint', function() {

var buf = new Buffer([50]);

var br = new BufferReader(buf);

br.readVarintNum().should.equal(50);

});

it('should read a 3 byte varint', function() {

var buf = new Buffer([253, 253, 0]);

var br = new BufferReader(buf);

br.readVarintNum().should.equal(253);

});

it('should read a 5 byte varint', function() {

var buf = new Buffer([254, 0, 0, 0, 0]);

buf.writeUInt32LE(50000, 1);

var br = new BufferReader(buf);

br.readVarintNum().should.equal(50000);

});

it('should throw an error on a 9 byte varint over the javascript uint precision limit', function() {

var buf = BufferWriter().writeVarintBN(new BN(Math.pow(2, 54).toString())).concat();

var br = new BufferReader(buf);

(function() {

br.readVarintNum();

}).should.throw('number too large to retain precision - use readVarintBN');

});

it('should not throw an error on a 9 byte varint not over the javascript uint precision limit', function() {

var buf = BufferWriter().writeVarintBN(new BN(Math.pow(2, 53).toString())).concat();

var br = new BufferReader(buf);

(function() {

br.readVarintNum();

}).should.not.throw('number too large to retain precision - use readVarintBN');

});

describe('#readVarintBN', function() {

it('should read a 1 byte varint', function() {

var buf = new Buffer([50]);

var br = new BufferReader(buf);

br.readVarintBN().toNumber().should.equal(50);

});

it('should read a 3 byte varint', function() {

var buf = new Buffer([253, 253, 0]);

var br = new BufferReader(buf);

br.readVarintBN().toNumber().should.equal(253);

});

it('should read a 5 byte varint', function() {

var buf = new Buffer([254, 0, 0, 0, 0]);

buf.writeUInt32LE(50000, 1);

var br = new BufferReader(buf);

br.readVarintBN().toNumber().should.equal(50000);

});

it('should read a 9 byte varint', function() {

var buf = Buffer.concat([new Buffer([255]), new Buffer('ffffffffffffffff', 'hex')]);

var br = new BufferReader(buf);

br.readVarintBN().toNumber().should.equal(Math.pow(2, 64));

});

describe('#reverse', function() {

it('should reverse this [0, 1]', function() {

var buf = new Buffer([0, 1]);

var br = new BufferReader(buf);

br.reverse().readAll().toString('hex').should.equal('0100');

});

bitcore/test/encoding/bufferreader.js at master · pinkmagicdev/bitcore · GitHub

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