@Test
  public void testMultipleConnections() throws Exception {
    doInit(3);

    sendRequest(1, 1); // request 1 connection 1

    sendRequest(2, 2); // request 1 connection 2

    sendRequest(3, 3); // request 1 connection 3

    sendRequest(2, 3); // request 2 connection 2

    sendRequest(3, 3); // request 2 connection 3

    sendRequest(3, 3); // request 3 connection 3

    doClose(3);

    assertEquals(3, _statistics.getConnections());
    assertEquals(0, _statistics.getConnectionsOpen());
    assertEquals(3, _statistics.getConnectionsOpenMax());
    assertTrue(_statistics.getConnectionsOpen() <= _statistics.getConnectionsOpenMax());

    assertTrue(_statistics.getConnectionsDurationMean() > 0);
    assertTrue(_statistics.getConnectionsDurationMax() > 0);
    assertTrue(_statistics.getConnectionsDurationMean() <= _statistics.getConnectionsDurationMax());

    assertEquals(6, _statistics.getMessagesIn());
    assertEquals(2.0, _statistics.getConnectionsMessagesInMean(), 0.01);
    assertEquals(3, _statistics.getConnectionsMessagesInMax());
    assertTrue(
        _statistics.getConnectionsMessagesInMean() <= _statistics.getConnectionsMessagesInMax());
  }
  @Test
  public void testMultipleRequests() throws Exception {
    doInit(1);

    sendRequest(1, 1);

    sendRequest(1, 1);

    doClose(1);

    assertEquals(1, _statistics.getConnections());
    assertEquals(0, _statistics.getConnectionsOpen());
    assertEquals(1, _statistics.getConnectionsOpenMax());
    assertTrue(_statistics.getConnectionsOpen() <= _statistics.getConnectionsOpenMax());

    assertTrue(_statistics.getConnectionsDurationMean() > 0);
    assertTrue(_statistics.getConnectionsDurationMax() > 0);
    assertTrue(_statistics.getConnectionsDurationMean() <= _statistics.getConnectionsDurationMax());

    assertEquals(2, _statistics.getMessagesIn());
    assertEquals(2.0, _statistics.getConnectionsMessagesInMean(), 0.01);
    assertEquals(2, _statistics.getConnectionsMessagesInMax());
    assertTrue(
        _statistics.getConnectionsMessagesInMean() <= _statistics.getConnectionsMessagesInMax());
  }