code: def test_cardinality(self, device, dtype, shape):
      vec = Vector2.random(shape, device, dtype)
      assert vec.shape[:-1] == shape
      assert vec.x.shape == shape
      assert vec.y.shape == shape
  
imports: import pytest
  import torch
  from kornia.geometry.vector import Scalar, Vector2, Vector3
  from kornia.testing import BaseTester
label_desc: Use image node_id 3 for calling the TestVector2 obj's underlying member method code with example usage: obj.test_cardinality(device, dtype, shape) without return types