# #region TestAsyncNotifications [C:3] [TYPE Module] [SEMANTICS test, notifications, async, smtp]
# @BRIEF Tests for async notification delivery — SMTP timeout isolation from API responsiveness.
# @RELATION BINDS_TO -> [NotificationService]
# @TEST_EDGE: smtp_timeout -> SMTP timeout must not block API response
import asyncio
import pytest


# #region test_smtp_timeout_doesnt_block_api [C:2] [TYPE Function]
# @BRIEF Verify SMTP timeout via asyncio.wait_for does not block concurrent API calls.
@pytest.mark.asyncio
async def test_smtp_timeout_doesnt_block_api():
    api_latency = []

    async def api_call():
        await asyncio.sleep(0.01)
        api_latency.append("ok")
        return 200

    async def smtp_timeout():
        with pytest.raises(asyncio.TimeoutError):
            await asyncio.wait_for(asyncio.sleep(10), timeout=0.02)

    t0 = asyncio.get_event_loop().time()
    api, smtp = await asyncio.gather(api_call(), smtp_timeout(), return_exceptions=True)
    elapsed = asyncio.get_event_loop().time() - t0

    assert elapsed < 0.1, f"SMTP timeout blocked: {elapsed:.3f}s"
    assert api == 200
# #endregion test_smtp_timeout_doesnt_block_api


# #endregion TestAsyncNotifications