def test_angle_between(self):
ip = Input_process()
a = Line(np_array=np.array([0, 0, 0, 1]))
b = Line(np_array=np.array([0, 0, 1, 0]))
angle = ip.angle_between(a, b)
self.assertEqual(angle, 90)
a = Line(np_array=np.array([0, 0, 1, 0]))
b = Line(np_array=np.array([0, 0, 0, 1]))
angle = ip.angle_between(a, b)
self.assertEqual(angle, 90)
a = Line(np_array=np.array([0, 0, 1, 0]))
b = Line(np_array=np.array([0, 0, 1, 1]))
angle = ip.angle_between(a, b)
self.assertAlmostEqual(angle, 45, places=1)
