text: import pytest
  
  from signal_processing import BaseClass, base_function
  
  given = pytest.mark.parametrize
  
  
  @given("fn", [BaseClass(), base_function])
  def test_parameterized(fn):
      assert "hello from" in fn()
  
  
  def test_base_function():
      assert base_function() == "hello from base function"
  
  
  def test_base_class():
      assert BaseClass().base_method() == "hello from BaseClass"
  