def test_wander_basic(self):
world = [[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY],
[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY],
[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY],
[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY],
[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY],
[CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY, CELL_EMPTY], ]
test_world = World(6, 1)
test_world.grid = world
creature_row = randrange(0, WORLD_DIM)
creature_col = randrange(0, WORLD_DIM)
test_creature = Creature([creature_row, creature_col], 0)
old_location = test_creature.get_location()
test_creature.wander(test_world)
new_location = test_creature.get_location()
self.assertTrue(abs(old_location[0] - new_location[0]) <= 1 and abs(old_location[1] - new_location[1]) <= 1, "creature.wander() method moves the creature to an adjacent cell. The total difference of x and y coordinates (before and after wander()) should be equal or less than 1. ")
