class_docstr: UMAPVisualizer tests
class_docstr_tok: ["UMAPVisualizer","tests"]
docstr: Verify the pipeline creation step for UMAP
docstr_tok: ["Verify","the","pipeline","creation","step","for","UMAP"]
code: def test_make_pipeline(self):
      """
      Verify the pipeline creation step for UMAP
      """
  
      umap = UMAPVisualizer()  # Should not cause an exception.
      assert umap.transformer_ is not None
  
      assert len(umap.transformer_.steps) == 1
  
imports: import sys
  import pytest
  import warnings
  from unittest import mock
  from tests.base import VisualTestCase
  from yellowbrick.text.umap_vis import *
  from yellowbrick.datasets import load_hobbies
  from yellowbrick.exceptions import YellowbrickValueError
  from sklearn.datasets import make_classification
  from sklearn.feature_extraction.text import TfidfVectorizer
label_desc: Use image node_id 1 for calling the TestUMAP obj's underlying member method code with example usage: obj.test_make_pipeline() without return types