code: def test_descriptions():
      primitives = {
          NumCharacters: "Calculates the number of characters in a given string, including whitespace and punctuation.",
          Day: "Determines the day of the month from a datetime.",
          Last: "Determines the last value in a list.",
          GreaterThan: "Determines if values in one list are greater than another list.",
      }
      assert _get_descriptions(list(primitives.keys())) == list(
          primitives.values()
      )
  
imports: import os
  import pytest
  from featuretools import list_primitives, summarize_primitives
  from featuretools.primitives import AddNumericScalar, Age, Count, Day, Diff, GreaterThan, Haversine, IsFreeEmailDomain, IsNull, Last, Max, Mean, Min, Mode, Month, MultiplyBoolean, NMostCommon, NumCharacters, NumericLag, NumUnique, NumWords, PercentTrue, Skew, Std, Sum, Weekday, Year, get_aggregation_primitives, get_default_aggregation_primitives, get_default_transform_primitives, get_transform_primitives
  from featuretools.primitives.base import PrimitiveBase
  from featuretools.primitives.base.transform_primitive_base import TransformPrimitive
  from featuretools.primitives.utils import _check_input_types, _get_descriptions, _get_summary_primitives, _get_unique_input_types, list_primitive_files, load_primitive_from_file
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 3 for calling a global function with example usage: test_descriptions() without return types