"""Pytest fixtures for the purchase-order email-processor suite.

Path/env setup and the reusable helpers live in ``_po_parser_support`` (a
uniquely named module) so the test files never do ``from conftest import``,
which would be ambiguous against the repo's top-level ``tests/conftest.py``.
"""

import pytest

from _po_parser_support import FakeDynamoResource, po_persistence


@pytest.fixture
def fake_dynamo(monkeypatch):
    # Phase 5: the dynamodb accessor cache lives on persistence.py now (the
    # module that owns every DynamoDB write); patch it there. The attribute name
    # is unchanged ("dynamodb") -- only the module moved. FakeDynamoResource
    # needs no .meta: its happy path never raises, so _merge_update's
    # `except _get_dynamodb().meta.client.exceptions...` clause is never
    # evaluated (moto exercises that path in tests/test_po_merge.py).
    fake = FakeDynamoResource()
    monkeypatch.setattr(po_persistence, "dynamodb", fake)
    return fake