/**
   * ToString is difficult to test fully because there is no restriction on the format of the
   * returned String. At least it can be tested that a String is returned and that it contains the
   * name of a checked in guest.
   */
  @Test
  public void testToString() {
    hotel.checkIn(correctPassword, GUEST_NAME_1);

    assertThat(hotel.toString(), CoreMatchers.containsString(GUEST_NAME_1));
  }