@Override
  public String getHelpMessage() {
    return HELP;
  }
@Test
  public void shouldGetHelp() {
    assertThat(command.getHelpMessage(),
        containsString("server:" + System.lineSeparator() + "\tShow the current server"));
    assertThat(command.getHelpMessage(),
        containsString("server <server>:" + System.lineSeparator()
            + "\tChange the current server to <server>"));
  }