text: import pytest
  
  from buildman.component.buildparse import extract_current_step
  
  
  @pytest.mark.parametrize('input,expected_step', [
    ("", None),
    ("Step a :", None),
    ("Step 1 :", 1),
    ("Step 1 : ", 1),
    ("Step 1/2 : ", 1),
    ("Step 2/17 : ", 2),
    ("Step 4/13 : ARG somearg=foo", 4),
  ])
  def test_extract_current_step(input, expected_step):
    assert extract_current_step(input) == expected_step
  