def test_replication_lag():
# pylint: disable=protected-access
now = datetime.now()
status = {
"db_time": now,
"pg_is_in_recovery": True,
"pg_last_xact_replay_timestamp": now,
"pg_last_xlog_receive_location": "0/0000001",
"pg_last_xlog_replay_location": "0/0000002",
}
result = ClusterMonitor._parse_status_query_result(status.copy())
assert result["replication_time_lag"] == 0.0
status["db_time"] += timedelta(seconds=50, microseconds=42)
result = ClusterMonitor._parse_status_query_result(status.copy())
assert result["replication_time_lag"] == 50.000042
status["db_time"] = now + timedelta(hours=42)
result = ClusterMonitor._parse_status_query_result(status.copy())
assert result["replication_time_lag"] == 151200.0
