index.js
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// Load modules
var Dgram = require('dgram');
var Lab = require('lab');
var Sntp = require('../lib');
// Declare internals
var internals = {};
// Test shortcuts
var expect = Lab.expect;
var before = Lab.before;
var after = Lab.after;
var describe = Lab.experiment;
var it = Lab.test;
describe('SNTP', function () {
describe('#time', function () {
it('returns consistent result over multiple tries', function (done) {
Sntp.time(function (err, time) {
expect(err).to.not.exist;
expect(time).to.exist;
var t1 = time.t;
Sntp.time(function (err, time) {
expect(err).to.not.exist;
expect(time).to.exist;
var t2 = time.t;
expect(Math.abs(t1 - t2)).is.below(200);
done();
});
});
});
it('resolves reference IP', function (done) {
Sntp.time({ host: 'ntp.exnet.com', resolveReference: true }, function (err, time) {
expect(err).to.not.exist;
expect(time).to.exist;
expect(time.referenceHost).to.exist;
done();
});
});
it('times out on no response', function (done) {
Sntp.time({ port: 124, timeout: 100 }, function (err, time) {
expect(err).to.exist;
expect(time).to.not.exist;
expect(err.message).to.equal('Timeout');
done();
});
});
it('errors on error event', function (done) {
var orig = Dgram.createSocket;
Dgram.createSocket = function (type) {
Dgram.createSocket = orig;
var socket = Dgram.createSocket(type);
process.nextTick(function () { socket.emit('error', new Error('Fake')) });
return socket;
};
Sntp.time(function (err, time) {
expect(err).to.exist;
expect(time).to.not.exist;
expect(err.message).to.equal('Fake');
done();
});
});
it('times out on invalid host', function (done) {
Sntp.time({ host: 'error', timeout: 10000 }, function (err, time) {
expect(err).to.exist;
expect(time).to.not.exist;
expect(err.message).to.equal('getaddrinfo ENOTFOUND');
done();
});
});
it('fails on bad response buffer size', function (done) {
var server = Dgram.createSocket('udp4');
server.on('message', function (message, remote) {
var message = new Buffer(10);
server.send(message, 0, message.length, remote.port, remote.address, function (err, bytes) {
server.close();
});
});
server.bind(49123);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(err.message).to.equal('Invalid server response');
done();
});
});
var messup = function (bytes) {
var server = Dgram.createSocket('udp4');
server.on('message', function (message, remote) {
var message = new Buffer([
0x24, 0x01, 0x00, 0xe3,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x41, 0x43, 0x54, 0x53,
0xd4, 0xa8, 0x2d, 0xc7,
0x1c, 0x5d, 0x49, 0x1b,
0xd4, 0xa8, 0x2d, 0xe6,
0x67, 0xef, 0x9d, 0xb2,
0xd4, 0xa8, 0x2d, 0xe6,
0x71, 0xed, 0xb5, 0xfb,
0xd4, 0xa8, 0x2d, 0xe6,
0x71, 0xee, 0x6c, 0xc5
]);
for (var i = 0, il = bytes.length; i < il; ++i) {
message[bytes[i][0]] = bytes[i][1];
}
server.send(message, 0, message.length, remote.port, remote.address, function (err, bytes) {
server.close();
});
});
server.bind(49123);
};
it('fails on bad version', function (done) {
messup([[0, (0 << 6) + (3 << 3) + (4 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.version).to.equal(3);
expect(err.message).to.equal('Invalid server response');
done();
});
});
it('fails on bad originate timestamp and alarm li', function (done) {
messup([[0, (3 << 6) + (4 << 3) + (4 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(err.message).to.equal('Wrong originate timestamp');
expect(time.leapIndicator).to.equal('alarm');
done();
});
});
it('returns time with death stratum and last61 li', function (done) {
messup([[0, (1 << 6) + (4 << 3) + (4 << 0)], [1, 0]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(time.stratum).to.equal('death');
expect(time.leapIndicator).to.equal('last-minute-61');
done();
});
});
it('returns time with reserved stratum and last59 li', function (done) {
messup([[0, (2 << 6) + (4 << 3) + (4 << 0)], [1, 0x1f]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(time.stratum).to.equal('reserved');
expect(time.leapIndicator).to.equal('last-minute-59');
done();
});
});
it('fails on bad mode (symmetric-active)', function (done) {
messup([[0, (0 << 6) + (4 << 3) + (1 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.mode).to.equal('symmetric-active');
done();
});
});
it('fails on bad mode (symmetric-passive)', function (done) {
messup([[0, (0 << 6) + (4 << 3) + (2 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.mode).to.equal('symmetric-passive');
done();
});
});
it('fails on bad mode (client)', function (done) {
messup([[0, (0 << 6) + (4 << 3) + (3 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.mode).to.equal('client');
done();
});
});
it('fails on bad mode (broadcast)', function (done) {
messup([[0, (0 << 6) + (4 << 3) + (5 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.mode).to.equal('broadcast');
done();
});
});
it('fails on bad mode (reserved)', function (done) {
messup([[0, (0 << 6) + (4 << 3) + (6 << 0)]]);
Sntp.time({ host: 'localhost', port: 49123 }, function (err, time) {
expect(err).to.exist;
expect(time.mode).to.equal('reserved');
done();
});
});
});
describe('#offset', function () {
it('gets the current offset', function (done) {
Sntp.offset(function (err, offset) {
expect(err).to.not.exist;
expect(offset).to.not.equal(0);
done();
});
});
it('gets the current offset from cache', function (done) {
Sntp.offset(function (err, offset) {
expect(err).to.not.exist;
expect(offset).to.not.equal(0);
var offset1 = offset;
Sntp.offset({}, function (err, offset) {
expect(err).to.not.exist;
expect(offset).to.equal(offset1);
done();
});
});
});
it('fails getting the current offset on invalid server', function (done) {
Sntp.offset({ host: 'error' }, function (err, offset) {
expect(err).to.exist;
expect(offset).to.equal(0);
done();
});
});
});
describe('#now', function () {
it('starts auto-sync, gets now, then stops', function (done) {
Sntp.stop();
var before = Sntp.now();
expect(before).to.equal(Date.now());
Sntp.start(function () {
var now = Sntp.now();
expect(now).to.not.equal(Date.now());
Sntp.stop();
done();
});
});
it('starts twice', function (done) {
Sntp.start(function () {
Sntp.start(function () {
var now = Sntp.now();
expect(now).to.not.equal(Date.now());
Sntp.stop();
done();
});
});
});
it('starts auto-sync, gets now, waits, gets again after timeout', function (done) {
Sntp.stop();
var before = Sntp.now();
expect(before).to.equal(Date.now());
Sntp.start({ clockSyncRefresh: 100 }, function () {
var now = Sntp.now();
expect(now).to.not.equal(Date.now());
expect(now).to.equal(Sntp.now());
setTimeout(function () {
expect(Sntp.now()).to.not.equal(now);
Sntp.stop();
done();
}, 110);
});
});
});
});