houseplan-card/tests_backend/test_junction_parity.py

"""Infrastructure contract of the fail-closed junction parity harness (#548)."""
from pathlib import Path

import pytest

from junction_parity import DEFAULT_FIXTURE, frontend_rules, load_backend_validator, load_spaces


def test_shared_fixture_is_nonempty_and_loads_every_named_scenario():
    spaces = load_spaces(DEFAULT_FIXTURE)
    assert len(spaces) == 15
    assert "angle-14" in spaces
    assert "distance-5-exact" in spaces
    assert "debris-node" in spaces


def test_missing_typescript_build_is_a_setup_failure_not_a_skip(tmp_path: Path):
    spaces = load_spaces(DEFAULT_FIXTURE, validator=load_backend_validator())
    with pytest.raises(FileNotFoundError, match="prerequisites are missing"):
        frontend_rules(spaces, build_dir=tmp_path / "missing-build")