def it_can_add_a_heading(self, add_heading_fixture, add_paragraph_, paragraph_):
level, style = add_heading_fixture
add_paragraph_.return_value = paragraph_
document = Document(None, None)
paragraph = document.add_heading("Spam vs. Bacon", level)
add_paragraph_.assert_called_once_with(document, "Spam vs. Bacon", style)
assert paragraph is paragraph_
def it_raises_on_heading_level_out_of_range(self):
document = Document(None, None)
with pytest.raises(ValueError):
document.add_heading(level=-1)
with pytest.raises(ValueError):
document.add_heading(level=10)
