class_docstr: Test the dataset loading functions
  
  Broadly: test each of the dataset loaders to ensure that they are valid
  for their particular type of dataset and that they return X and y by
  default. Then test their shape to ensure that the dataset hasn't changed
  unexpectedly between versions. See ``test_load_concrete`` for a sketch.
  
  Final tests with parametrize test all loaders against Base classes.
  Make sure you scroll to the bottom and implement your loader in the
  correct test batch!
class_docstr_tok: ["Test","the","dataset","loading","functions","Broadly",":","test","each","of","the","dataset","loaders","to","ensure","that","they","are","valid","for","their","particular","type","of","dataset","and","that","they","return","X","and","y","by","default",".","Then","test","their","shape","to","ensure","that","the","dataset","has","n't","changed","unexpectedly","between","versions",".","See","``","test_load_concrete","``","for","a","sketch",".","Final","tests","with","parametrize","test","all","loaders","against","Base","classes",".","Make","sure","you","scroll","to","the","bottom","and","implement","your","loader","in","the","correct","test","batch","!"]
docstr: Test loading the walking activity clustering dataset
docstr_tok: ["Test","loading","the","walking","activity","clustering","dataset"]
code: def test_load_walking(self):
      """
      Test loading the walking activity clustering dataset
      """
      data = load_walking(return_dataset=True)
      assert_valid_dataset(data, "walking")
  
      X, y = load_walking()
      assert X.shape == (149332, 4)
      assert y.shape == (149332,)
  
imports: import pytest
  import numpy
  from unittest.mock import patch
  from yellowbrick.datasets.loaders import *
  from yellowbrick.datasets.loaders import DATASETS
  from yellowbrick.datasets.base import Dataset, Corpus
  from yellowbrick.datasets.path import dataset_exists, dataset_archive
  from yellowbrick.datasets.path import find_dataset_path
  from yellowbrick.exceptions import DatasetsError
label_desc: Use image node_id 10 for calling the TestDatasetLoaders obj's underlying member method code with example usage: obj.test_load_walking() without return types