code: def test_hls2yuv():
      cv_hls = cv.cvtColor(cv_bgr, cv.COLOR_BGR2RGB)
      cv_hls = caer.to_tensor(cv_hls, cspace="rgb")
      yuv = caer.hls2yuv(cv_hls)
  
      assert len(yuv.shape) == 3
      assert isinstance(yuv, caer.Tensor)
      assert yuv.is_yuv()
  
file_path: caer/tests/color/test_hls.py
imports: import caer
  import cv2
  import os
label_desc: Use image node_id 6 for calling a global function with example usage: test_hls2yuv() without return types