code: def test_elliptic_curve():
      # Point addition and multiplication
      e3 = EllipticCurve(-1, 9)
      p = e3(0, 3)
      q = e3(-1, 3)
      r = p + q
      assert r.x == 1 and r.y == -3
      r = 2 * p + q
      assert r.x == 35 and r.y == 207
      r = -p + q
      assert r.x == 37 and r.y == 225
      # Verify result in http://www.lmfdb.org/EllipticCurve/Q
      # Discriminant
      assert EllipticCurve(-1, 9).discriminant == -34928
      assert EllipticCurve(-2731, -55146, 1, 0, 1).discriminant == 25088
      # Torsion points
      assert len(EllipticCurve(0, 1).torsion_points()) == 6
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_elliptic_curve() without return types