code: def test_get_feature_names_out_default():
      umap = UMAP()
      # get_feature_names_out should generate feature names in a certain format if no names are passed.
      default_result = umap.get_feature_names_out()
      expected_default_result = ["umap_component_1", "umap_component_2"]
      assert default_result == expected_default_result
  
file_path: umap/umap/tests/test_umap_get_feature_names_out.py
imports: import numpy
  from sklearn.datasets import make_classification
  from sklearn.pipeline import Pipeline, FeatureUnion
  from ..umap_ import UMAP
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_feature_names_out_default() without return types