"""mattermost-lts — BACKUP overlay (Phase 1e HC3): assertion-only + additive.
ops.pre_backup wrote "original" into postgres before the backup op (the recipe's db pre-hook dumps
the DB + archives the PGDATA dir). This overlay ADDS: the seeded row is intact at backup time."""

import os
import sys

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
from harness import lifecycle  # noqa: E402


def _psql(domain, sql):
    cmd = (
        "PGPASSWORD=$(cat /run/secrets/postgres_password) "
        f'psql -U mattermost -d mattermost -tAc "{sql}"'
    )
    return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], service="postgres").strip()


def test_backup_captures_state(live_app):
    assert _psql(live_app, "SELECT v FROM ci_marker;") == "original", (
        "the seeded postgres state was not present at backup time"
    )
