def tearDown(self):
     # Setting the world size to its original value.
     world = World()
     world._size = self._original_world_size
 def tearDown(self):
     # Setting the world size to its original value.
     world = World()
     world._size = self._original_world_size
 def setUp(self):
     # Because we create a separate island somewhere out of world, we expand
     # the world's size to cover that island too.
     world = World()
     self._original_world_size = world.get_size()
     world._size = (15, 34)
 def setUp(self):
     # Because we create a separate island somewhere out of world, we expand
     # the world's size to cover that island too.
     world = World()
     self._original_world_size = world.get_size()
     world._size = (15, 34)