docstr: Test catalog_coverage function
docstr_tok: ["Test","catalog_coverage","function"]
code: def test_catalog_coverage(self):
      """
      Test catalog_coverage function
      """
  
      # GIVEN test catalog_coverage metrics
      test_predicted = [["X", "Y", "Z"], ["X", "Y", "Z"]]
      test_catalog = ["A", "B", "C", "X", "Y", "Z"]
      test_k = 3
  
      # WHEN metrics.catalog_coverage is run
      catalog_coverage = metrics.catalog_coverage(
          predicted=test_predicted, catalog=test_catalog, k=test_k
      )
  
      # THEN the coverage should equal 50.
      self.assertEqual(catalog_coverage, 50.0)
  
file_path: recmetrics/tests/test_metrics.py
imports: import unittest
  from unittest import mock
  import pandas
  from recmetrics import metrics
label_desc: Use image node_id 3 for calling the TestMetrics obj's underlying member method code with example usage: obj.test_catalog_coverage() without return types