val inflater = MessageInflater(true)
    val buffer = Buffer()

    val message1 = "hello".encodeUtf8()
    val message2 = "hello 2".encodeUtf8()

    DeflaterSink(buffer, Deflater(Deflater.DEFAULT_COMPRESSION, true)).use { sink ->
      sink.write(Buffer().write(message1), message1.size.toLong())
    }
    buffer.writeByte(0x00)

    clientListener.assertOpen()
    val server = serverListener.assertOpen()

    // Server to client message big enough to be compressed.
    val message1 = repeat('a', RealWebSocket.DEFAULT_MINIMUM_DEFLATE_SIZE.toInt())
    server.send(message1)
    clientListener.assertTextMessage(message1)

    // Client to server message big enough to be compressed.
    val message2 = repeat('b', RealWebSocket.DEFAULT_MINIMUM_DEFLATE_SIZE.toInt())

class ProblemCollectorFactoryTest {

    @Test
    void testNewInstance() {
        ProblemCollector collector1 = ProblemCollectorFactory.newInstance(null);

        Problem problem = new DefaultProblem("MESSAGE1", null, null, -1, -1, null);
        ProblemCollector collector2 = ProblemCollectorFactory.newInstance(Collections.singletonList(problem));

        assertNotSame(collector1, collector2);

        constructor.setAccessible(true);

        // Test with suppression enabled and writable stack trace
        String message1 = "Test with suppression enabled";
        CrawlerSystemException exception1 = constructor.newInstance(message1, true, true);
        assertNotNull(exception1);
        assertEquals(message1, exception1.getMessage());
        assertNull(exception1.getCause());

        preauthService.initializeSession(sessionId, salt, PreauthIntegrityService.HASH_ALGO_SHA512);

        // Simulate message exchange
        preauthService.updatePreauthHash(sessionId, "Message1".getBytes());
        preauthService.updatePreauthHash(sessionId, "Message2".getBytes());

        byte[] expectedHash = preauthService.getCurrentPreauthHash(sessionId);