def test_get_delta1(self):
""" Tests that a positive delta can be returned properly. """
b = Board()
origin = (2, 2)
target = (3, 3)
self.assertTupleEqual((1, 1), b.get_delta(origin, target))
def test_get_delta2(self):
""" Tests that a negative delta can be returned properly. """
b = Board()
origin = (2, 2)
target = (1, 1)
self.assertTupleEqual((-1, -1), b.get_delta(origin, target))