@Test
public void usersShouldListAllUserSeparatedWithComma() {

    userList.add(new User("Amy", 1));
    userList.add(new User("Peter", 2));
    userList.add(new User("Zelda", 3));
    parser.parse("/users");
    verify(messageController).showSystemMessage("Users: Amy, MySelf, Peter, Zelda");
}