### Question:
StringSockets { public static Observable<String> from(final String host, final int port, long quietTimeoutMs, long reconnectDelayMs, Charset charset, Scheduler scheduler) { return from(socketCreator(host, port, (int) quietTimeoutMs), quietTimeoutMs, reconnectDelayMs, charset, scheduler); }  static Observable<String> from(final String host, final int port, long quietTimeoutMs,
            long reconnectDelayMs, Charset charset, Scheduler scheduler); static Observable<String> from(Func0<Socket> socketCreator, long quietTimeoutMs,
            long reconnectDelayMs, Charset charset, Scheduler scheduler); static Builder from(String host); static Observable<String> strings(final String host, final int port, int quietTimeoutMs,
            final Charset charset); static Observable<String> strings(Func0<Socket> socketCreator, final Charset charset); static Observable<String> mergeLinesFrom(Observable<HostPort> hostPorts,
            Scheduler scheduler); static Observable<String> mergeLinesFrom(Observable<HostPort> hostPorts, int maxLineLength); static Observable<String> mergeLinesFrom(Observable<HostPort> hostPorts,
            Scheduler scheduler, int maxLineLength); static Observable<String> mergeLinesFrom(Observable<HostPort> hostPorts); static void main(String[] args);  }### Answer:
@Test public void testLinesFromARegularlyEmittingSource() throws InterruptedException { Observable<String> source = Observable.range(1, 1000000).map(new Func1<Integer, String>() { @Override public String call(Integer n) { return n.toString(); } }).delay(100, TimeUnit.MILLISECONDS, Schedulers.immediate()); ExecutorService executor = Executors.newFixedThreadPool(2); int port = PortFinder.findFreePort(); final StringServer server = StringServer.create(source, port); Runnable runnable = new Runnable() { @Override public void run() { server.start(); } }; executor.execute(runnable); List<String> list = StringSockets .from("localhost", port, 1000, 1000, StandardCharsets.UTF_8, Schedulers.io()) .take(5).toList().toBlocking().single(); System.out.println(list); server.stop(); executor.awaitTermination(1000, TimeUnit.MILLISECONDS); }