tests/test_state_roundtrip.py

"""State is the source of truth; the struct must survive a dump/validate round-trip and
render into the .md views. (Parsing .md back is intentionally not implemented.)"""

from __future__ import annotations

from visualnovel import state
from visualnovel.schemas import Character, GameState, Scene


def _sample() -> GameState:
    return GameState(
        seed=7,
        vibe="cozy · Fantasy forest",
        style_guide="anime, soft cel shading",
        scene=Scene(
            id="threshold",
            place="The Threshold",
            description="edge of the wood",
            mood="cozy",
            present=["moth"],
        ),
        characters={
            "moth": Character(
                id="moth",
                name="Mothlight",
                one_line="a nervous lantern-moth",
                appearance="amber wings",
            ),
        },
    )


def test_state_struct_roundtrip():
    s = _sample()
    again = GameState.model_validate(s.model_dump())
    assert again == s
    assert again.characters["moth"].name == "Mothlight"


def test_render_world_md_contains_scene():
    s = _sample()
    md = state.render_world_md(s)
    assert "The Threshold" in md
    assert "Mothlight" in md  # character index
    assert "{{" not in md  # all placeholders filled


def test_render_character_md():
    s = _sample()
    md = state.render_character_md(s, s.characters["moth"])
    assert "Mothlight" in md and "amber wings" in md
    assert "{{" not in md