def test_get_direction_to_combination(self):
start = Point(1, 2)
end = Point(5, 0)
answer = start.get_direction_to(end)
self.assertEqual(answer, CompositeDirection(E, E, E, E, S, S))
magnitude = sqrt(20)
self.assertAlmostEqual(answer.value[0], 4/magnitude, places=7)
self.assertAlmostEqual(answer.value[1], -2/magnitude, places=7)
def test_get_direction_to_west(self):
start = Point(1, 2)
end = Point(-1, 2)
answer = start.get_direction_to(end)
self.assertEqual(answer, CompositeDirection(W))
self.assertEqual(answer.value, (-1.0, 0))
def test_get_direction_to_south(self):
start = Point(1, 2)
end = Point(1, 0)
answer = start.get_direction_to(end)
self.assertEqual(answer, CompositeDirection(S))
self.assertEqual(answer.value, (0, -1.0))