// A test that a move south doesn't do anything if there is not a room there.
 @Test
 public void illegalMoveSouthNoRoomTest() {
   Map map = new Map();
   Room loc = Mockito.mock(Room.class);
   Door door = Mockito.mock(Door.class);
   Mockito.when(loc.getSouthRoom()).thenReturn(null);
   Mockito.when(loc.getSouthDoor()).thenReturn(door);
   map.setLocation(loc);
   map.moveSouth(loc);
   assertEquals(loc, map.getLocation());
 }