@Test
public void ekstraSlashShouldShowSystemMessageIfChatMessageFails() throws CommandException {

    doThrow(new CommandException("No slash for you")).when(controller).sendChatMessage(anyString());
    parser.parse("//msg niles hello");
    verify(controller).sendChatMessage("/msg niles hello");
    verify(messageController).showSystemMessage("No slash for you");
}