public void testLiveConnections() throws Exception {
        int serverPortNumber = 47348;
        int clientPortNumber = 47348;
        Server server = new Server(serverPortNumber);
        Thread serverThread = new Thread(server);
        serverThread.start();

        assertEquals(0, server.getConnections().size());

        Socket clientSocket = new Socket("localhost", clientPortNumber, null, 0);
        UserClient userClient = new UserClient(clientSocket);
        Thread.sleep(500);
        assertEquals(1, server.getConnections().size());

        server.alertSocketClosed(server.getConnections().get(0));
        assertEquals(0, server.getConnections().size());
    }