code: def test___len__(self, data):
      data, n = data
  
      assert len(data) == n
  
file_path: NeuralCompression/tests/data/test_clic_2020_image.py
imports: import numpy
  import pytest
  from PIL.Image import Image
  from utils import create_random_image, write_image_to_file
  from neuralcompression.data import CLIC2020Image
label_desc: Use image node_id 2 for calling the TestCLIC2020Image obj's underlying member method code with example usage: obj.test___len__(data) without return types