code: def test_yuv2luv():
      cv_yuv = cv.cvtColor(cv_bgr, cv.COLOR_BGR2YUV)
      cv_yuv = caer.to_tensor(cv_yuv, cspace="yuv")
  
      luv = caer.yuv2luv(cv_yuv)
  
      assert len(luv.shape) == 3
      assert isinstance(luv, caer.Tensor)
      assert luv.is_luv()
  
file_path: caer/tests/color/test_yuv.py
imports: import caer
  import cv2
  import os
label_desc: Use image node_id 7 for calling a global function with example usage: test_yuv2luv() without return types