code: def test_read_movielens_posters_df(movielens_posters_df):
      assert movielens_posters_df.shape == (1682, 2)
  
file_path: collie/tests/test_movielens.py
imports: from unittest import mock
  import urllib
  import pandas
  import pytest
  from collie.movielens import get_recommendation_visualizations, read_movielens_posters_df, run_movielens_example
label_desc: Use image node_id 4 for calling a global function with example usage: test_read_movielens_posters_df(movielens_posters_df) without return types