"""Shared pytest fixtures.

The validation engine defaults to a process-global Redis/in-memory cache so
results are reused across runs. That is correct in production but leaks state
between tests — one test's cached DNS/MX then satisfies the next test's
"resolution happened" assertion.

Clearing the in-memory tier between tests keeps the suite hermetic without
every test having to inject its own cache. Tests that assert on caching still
inject a recording cache explicitly.
"""
import pytest


@pytest.fixture(autouse=True)
def _clear_global_cache():
    try:
        from app.utils import cache as cache_mod
    except Exception:  # pragma: no cover - import guard
        yield
        return

    cache_mod._memory_cache.clear()
    yield
    cache_mod._memory_cache.clear()