Method it_can_add_a_heading

tests/test_document.py:65–73

(
        self, level: int, style: str, document: Document, add_paragraph_: Mock, paragraph_: Mock
    )

        ("level", "style"), [(0, "Title"), (1, "Heading 1"), (2, "Heading 2"), (9, "Heading 9")]
    )
    def it_can_add_a_heading(
        self, level: int, style: str, document: Document, add_paragraph_: Mock, paragraph_: Mock
    ):
        add_paragraph_.return_value = paragraph_

        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):
        with pytest.raises(ValueError, match="level must be in range 0-9, got -1"):