def test_calculat_angles_for_multiple_centers(self):
p1 = [0, 1]
p2 = [1, 0]
c = np.linspace(-0.5, 0.5)
angles = calculate_angles(p1, p2, c)
self.assertAlmostEqual(np.sum(angles), np.pi/2*len(c))
def test_calculate_angles_for_single_values(self):
p1 = [0, 1]
p2 = [1, 0]
c = [0, 0]
angle = calculate_angles(p1, p2, c)
self.assertAlmostEqual(angle, np.pi/2)
