"""Hardening test fixtures.

Per-test isolation is STRUCTURAL, not via a reset hook: every test builds a fresh Flask app, so
each gets its own ``memory://`` rate-limit store on ``app.extensions`` and its own breaker
registry. There is no process-global hardening state to reset between tests; if one is ever
introduced, add a real teardown here rather than relying on this comment.
"""

from pathlib import Path

_HARDENING_TESTS_DIR = Path(__file__).parent


def pytest_collection_modifyitems(items):
    """Mark every test in this subtree ``no_db`` so the root autouse app/DB fixtures opt out.

    These are pure unit tests -- they build their own Flask app (or none) and never touch the
    repo DB. Tagging by path (not by shadowing the root fixtures by name) keeps the opt-out
    robust if the root conftest renames or adds DB fixtures.
    """
    for item in items:
        if _HARDENING_TESTS_DIR in Path(str(item.fspath)).parents:
            item.add_marker('no_db')