def test_is_right_turn(self): """Test the is_right_turn method.""" points = np.array([[1, 1], [0, 0], [-1, 1], [0.8, 0.5]]) ch = ConvexHull(points) ch.convex_hull = [1, 2] self.assertTrue(ch.is_right_turn(0)) self.assertTrue(ch.is_right_turn(3)) ch.convex_hull = [0, 1] self.assertTrue(ch.is_right_turn(2)) self.assertFalse(ch.is_right_turn(3)) ch.convex_hull = [1, 0] self.assertFalse(ch.is_right_turn(2)) self.assertTrue(ch.is_right_turn(3))