/** Test of changing number of beds in room */
  @Test
  public void changeNumberOfBedsTest() {

    int numberOfBeds = 34;

    doAnswer(
            invocationOnMock -> {
              room1.setNumberOfBeds(numberOfBeds);
              return null;
            })
        .when(roomDao)
        .update(any(Room.class));
    assertNotEquals(room1.getNumberOfBeds(), numberOfBeds);
    roomService.changeNumberOfBeds(room1, numberOfBeds);
    verify(roomDao).update(any(Room.class));
    assertEquals(room1.getNumberOfBeds(), numberOfBeds);
  }