code: def test_StepFunctionBadShape():
      x = np.arange(20)
      y = np.arange(21)
      pytest.raises(ValueError, utils.StepFunction, x, y)
      x = np.zeros((2, 2))
      y = np.zeros((2, 2))
      pytest.raises(ValueError, utils.StepFunction, x, y)
  
imports: import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal
  from ..None import utils
label_desc: Use image node_id 2 for calling a global function with example usage: test_StepFunctionBadShape() without return types