peerjs-server/test/server.js

var PeerServer = require('../').PeerServer;
var expect = require('expect.js');
var sinon = require('sinon');

describe('PeerServer', function() {
    describe('#_initializeWSS', function() {
        WebSocketServer = sinon.stub();

    });

    describe('#_configureWS', function() {

    });

    describe('#_checkKey', function() {
        var p;
        before(function(done) {
            PeerServer.prototype._initializeHTTP = sinon.stub();
            p = PeerServer({ port: 8000 }, done);
            p._checkKey('peerjs', 'myip', function() {});
        });

        after(function(done) {
            p._server.close(done);
        });


        it('should reject keys that are not the default', function(done) {
            p._checkKey('bad key', null, function(response) {
                expect(response).to.be('Invalid key provided');
                done();
            });
        });

        it('should accept valid key/ip pairs', function(done) {
            p._checkKey('peerjs', 'myip', function(response) {
                expect(response).to.be(null);
                done();
            });
        });

        it('should reject ips that are at their limit', function(done) {
            p.options.ip_limit = 0;
            p._checkKey('peerjs', 'myip', function(response) {
                expect(response).to.be('myip has reached its concurrent user limit');
                done();
            });
        });

        it('should reject when the server is at its limit', function(done) {
            p.options.concurrent_limit = 0;
            p._checkKey('peerjs', 'myip', function(response) {
                expect(response).to.be('Server has reached its concurrent user limit');
                done();
            });
        });

    });

    describe('#_initializeHTTP', function() {

    });

    describe('#_startStreaming', function() {

    });

    describe('#_pruneOutstanding', function() {

    });

    describe('#_processOutstanding', function() {

    });

    describe('#_removePeer', function() {
        var p;
        before(function(done) {
            PeerServer.prototype._initializeHTTP = sinon.stub();
            p = new PeerServer({ port: 8000 }, done);

            var fake = {ip: '0.0.0.0'};
            p._ips[fake.ip] = 1;
            p._clients['peerjs'] = {};
            p._clients['peerjs']['test'] = fake;
        });

        after(function(done) {
            p._server.close(done);
        });

        it('should decrement the number of ips being used and remove the connection', function() {
            expect(p._ips['0.0.0.0']).to.be(1);
            p._removePeer('peerjs', 'test');
            expect(p._ips['0.0.0.0']).to.be(0);
            expect(p._clients['peerjs']['test']).to.be(undefined);
        });
    });

    describe('#_handleTransmission', function() {
        var p;
        var KEY = 'peerjs';
        var ID = 'test';
        before(function(done) {
            PeerServer.prototype._initializeHTTP = sinon.stub();
            p = PeerServer({ port: 8000 }, done);
            p._clients[KEY] = {};
        });

        after(function(done) {
            p._server.close(done);
        });

        it('should send to the socket when appropriate', function() {
            var send = sinon.spy();
            var write = sinon.spy();
            var message = {dst: ID};
            p._clients[KEY][ID] = {
                socket: {
                    send: send
                },
                res: {
                    write: write
                }
            }
            p._handleTransmission(KEY, message);
            expect(send.calledWith(JSON.stringify(message))).to.be(true);
            expect(write.calledWith(JSON.stringify(message))).to.be(false);
        });

        it('should write to the response with a newline when appropriate', function() {
            var write = sinon.spy();
            var message = {dst: ID};
            p._clients[KEY][ID] = {
                res: {
                    write: write
                }
            }
            p._handleTransmission(KEY, message);
            expect(write.calledWith(JSON.stringify(message) + '\n')).to.be(true);
        });

        // no destination.
        it('should push to outstanding messages if the destination is not found', function() {
            var message = {dst: ID};
            p._outstanding[KEY] = {};
            p._clients[KEY] = {};
            p._handleTransmission(KEY, message);
            expect(p._outstanding[KEY][ID][0]).to.be(message);
        });

        it('should not push to outstanding messages if the message is a LEAVE or EXPIRE', function() {
            var message = {dst: ID, type: 'LEAVE'};
            p._outstanding[KEY] = {};
            p._clients[KEY] = {};
            p._handleTransmission(KEY, message);
            expect(p._outstanding[KEY][ID]).to.be(undefined);

            message = {dst: ID, type: 'EXPIRE'};
            p._handleTransmission(KEY, message);
            expect(p._outstanding[KEY][ID]).to.be(undefined);
        });

        it('should remove the peer if there is no dst in the message', function() {
            var message = {type: 'LEAVE'};
            p._removePeer = sinon.spy();
            p._outstanding[KEY] = {};
            p._handleTransmission(KEY, message);
            expect(p._removePeer.calledWith(KEY, undefined)).to.be(true);
        });

        it('should remove the peer and send a LEAVE message if the socket appears to be closed', function() {
            var send = sinon.stub().throws();
            var message = {dst: ID};
            var leaveMessage = {type: 'LEAVE', dst: undefined, src: ID};
            var oldHandleTransmission = p._handleTransmission;
            p._removePeer = function() {
                // Hacks!
                p._handleTransmission = sinon.spy();
            };
            p._clients[KEY][ID] = {
                socket: {
                    send: send
                }
            }
            p._handleTransmission(KEY, message);
            expect(p._handleTransmission.calledWith(KEY, leaveMessage)).to.be(true);
        });
    });

    describe('#_generateClientId', function() {
        var p;
        before(function(done) {
            p = new PeerServer({ port: 8000 }, done);
        });

        after(function(done) {
            p._server.close(done);
        });

        it('should generate a 16-character ID', function() {
            expect(p._generateClientId('anykey').length).to.be.within(15, 16);
        });
    });
});