code: def test_recommend_top_k_items(model_fit, df_clean):
      top_k_recommendations = model_fit.recommend_top_k_items(
          df_clean, k=K
      )
      assert len(top_k_recommendations) > len(df_clean)
  
file_path: recommenders/tests/unit/recommenders/models/test_tfidf_utils.py
imports: import pytest
  import scipy
  import pandas
  from recommenders.models.tfidf.tfidf_utils import TfidfRecommender
label_desc: Use image node_id 11 for calling a global function with example usage: test_recommend_top_k_items(model_fit, df_clean) without return types