from types import SimpleNamespace
from genesis.writer.template_mapper import map_template
from genesis.writer.models import ChapterSpec


def _fake_parsed():
    ch1 = SimpleNamespace(chapter_id="intro", title="はじめに", section_placeholder="{{section:introduction}}")
    ch2 = SimpleNamespace(chapter_id="db_design", title="DB 設計", section_placeholder=None)
    return SimpleNamespace(chapters=[ch1, ch2])


def test_map_template_ordered():
    specs = map_template(_fake_parsed())
    assert [s.chapter_id for s in specs] == ["intro", "db_design"]
    assert specs[0].section_placeholder == "{{section:introduction}}"
    assert specs[1].section_placeholder is None
    assert all(isinstance(s, ChapterSpec) for s in specs)