"""Tests for gateway.memory_monitor — periodic process memory logging.

Ported from cline/cline#10343.  The module logs a structured
``[MEMORY] rss=...MB ...`` line periodically so long-running gateway
leaks show up as a time series in agent.log / gateway.log.
"""

from __future__ import annotations


import pytest

from gateway import memory_monitor as mm


@pytest.fixture(autouse=True)
def _ensure_monitor_stopped():
    """Every test starts from a clean state and leaves one behind."""
    mm.stop_memory_monitoring(timeout=1.0)
    yield
    mm.stop_memory_monitoring(timeout=1.0)






def test_double_start_is_noop():
    assert mm.start_memory_monitoring(interval_seconds=3600.0) is True
    assert mm.start_memory_monitoring(interval_seconds=3600.0) is False
    assert mm.is_running() is True


def test_stop_ends_monitoring():
    mm.start_memory_monitoring(interval_seconds=3600.0)
    mm.stop_memory_monitoring(timeout=1.0)
    assert mm.is_running() is False